Free Mechanic Certification Study Guide Information - Michigan


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Pages: 26
Date: May 28, 2008
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State: Michigan
Category: Secretary of State
Author: Michigan Department of State
Word Count: 6,871 Words, 46,294 Characters
Page Size: Letter (8 1/2" x 11")
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http://www.michigan.gov/documents/sos/mechstudykit_208010_7.pdf

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CONTENTS OF THIS PACKET This packet contains the following information regarding mechanic testing, certification, and trainee permit: Information for the Mechanic Trainee Locating Secretary of State Branch Offices & Test Tips Mechanic Certification Frequently Asked Questions Mechanic Study Guides Read the information in this packet carefully. Then, if you have further questions about the materials, contact the Licensing Unit at 1-888-SOS-MICH (1-888-767-6424).

INFORMATION FOR THE MECHANIC TRAINEE There are two ways a person can get the skills needed to be a mechanic. The first is by going to a school which offers automotive training. This usually includes hands-on learning along with classroom studies. The other way is by working at a repair shop with an experienced mechanic who can teach proper repair methods and see that the work done by the trainee is correct. Most good mechanics have learned their trade by both schooling and experience on the job. Today's cars and trucks are becoming more and more complicated to repair. This means that both training and experience are more important than ever to the person who wants to earn a living as a mechanic. If you are currently performing major repairs on motor vehicles in Michigan, you must be a certified mechanic or hold a valid trainee permit. A mechanic trainee permit is valid for a period of two years from the date of issue in the major repair categories listed on the permit. A permit may not be renewed. Upon expiration of the trainee permit, a mechanic trainee must either become certified or stop performing repairs in the categories listed on the permit. A mechanic trainee may perform repairs only in the categories listed on the permit under the supervision of a mechanic who is currently certified by the State of Michigan in those repair categories.

BUSINESS LICENSING AND REGULATION DIVISION RICHARD H. AUSTIN BUILDING h 3RD FLOOR h 430 W. ALLEGAN h LANSING, MICHIGAN 48918 www.Michigan.gov/sos h (517) 373-9070

A mechanic trainee should display his or her trainee permit in a conspicuous location, and when a mechanic trainee works on a motor vehicle, his or her name and trainee permit number must appear on the customer's final invoice. The name and certification number of the supervising mechanic must also appear on the final invoice. It is the responsibility of trainees and certified mechanics to insure that their names and numbers are not used inappropriately by their employers. The Bureau of Regulatory Services may take action to suspend or revoke a mechanic trainee permit if a trainee misrepresents the need for repairs, performs unnecessary repairs, or makes false or misleading statements in connection with a diagnosis or repair. In addition, a mechanic trainee may be required to obtain additional training or discontinue performing certain repairs if it is determined that the mechanic or trainee disregarded or departed from accepted industry repair standards. 5/08

MECHANIC TESTING OFFERED AT SELECTED SECRETARY OF STATE BRANCH OFFICES
The Bureau of Regulatory Services offers written tests at selected Secretary of State branch offices around the state with at least one branch in every county. To search for a branch office nearest you, access the Secretary of State Branch Office Locator available through the internet at: Michigan.gov/sos or Telephone: 1-888-SOS-MICH (1-888-767-6424) for assistance.

Test Tips: The State mechanic exams contain multiple choice questions and are intended to measure the competencies necessary to work in a particular area of study. An individuals ability to pass an exam depends on the amount of knowledge the person has covering a specific area, and how the individual interprets the test items. All exams are closed-book format. No reference materials or electronic devices may be used during testing. Absolutely no copying of examination items is permitted. Before taking exams, keep these tips in mind: Prepare in advance! It is suggested that individuals reference the State Mechanic Study Guides in preparation of any one exam. Study guides provide a listing of the primary categories that would be found in a specific specialty area of study along with the specific subcategory subjects that will make up the exam. Each exam primary category is also broken down into percentages of questions asked therefore allowing the individual the ability to focus more heavily on specific areas of the exam. Read each question carefully, including ALL of the answers, so that you understand exactly what is being asked. Answer the questions based ONLY on the choices given. Don't try to "read into" the question or add information that is not provided. For many individuals, this is where they fail to answer the question correctly. Don't spend too much time on any one question. If you are not sure of your answer, try to narrow down your choices and mark the answer you think is most likely correct. Chances are your first guess is the most correct! Answer every question. Leave no stray marks on the exam. Bubble in each answer as indicated on the instructions. Be neat! The exams are scored electronically. Ensure that you have completed the exam according to the examination instructions provided within the test booklet, registration form and answer sheet. Failure to follow test instructions may result in a No-Score result. The testing individual, not the administration staff, is ultimately responsible for ensuring that the exam is completed properly.









Important Reminders: The State of Michigan does not provide or recommend any single educational textbook or publishing materials for your review covering the mechanic certification categories. However, it is recommend that individuals who prefer home study acquire textbooks similar to those found in technical skill centers, and two or 4 four year colleges. Typically, these types of textbooks are not found at your local library, but are available though educational book stores and various automotive publishers. Select branch offices administer written tests ONLY and do not have specific information concerning your test results. If you have not received your test results after six weeks, or have lost them, contact the Customer Support Section at 1-888-SOS-MICH (1-888-767-6424). All motor vehicle mechanics performing major repairs for compensation must be certified by the Michigan Department of State in the categories for which they perform repairs. A person who is not certified may obtain a trainee permit. A mechanic trainee permit is valid for a period of two years from the date of issue in the major repair categories listed on the permit. A permit may not be renewed. Upon expiration of the trainee permit, a mechanic trainee must either become certified or stop performing repairs in the categories listed on the permit. A mechanic trainee may perform repairs only in the categories listed on the permit under the supervision of a mechanic who is currently certified by the State of Michigan in those repair categories.







Further mechanic test issues may be directed to:

Michigan Department of State Bureau of Regulatory Services Business Licensing & Regulation Division Licensing Unit Lansing, MI 48918 Telephone: 1-888-SOS-MICH (1-888-767-6424) Fax: (517) 335-2810

AR-0144 (05/2008) By Authority of PA 300 of 1974

AR-0145 (5/2008)

MECHANIC CERTIFICATION FREQUENTLY ASKED QUESTIONS
MECHANIC CERTIFICATION REQUIREMENTS 1. Q. Who must be certified? A. All persons who repair motor vehicles for compensation, including the reconditioning, replacement, diagnosis, adjustment or alteration of the operating condition of the vehicle or any component or sub-assembly, in any category of major repair, must be certified by the State of Michigan. Any person performing major repairs who is not certified must obtain a mechanic trainee permit in the categories of repair in which he or she works. 2. Q. What are the motor vehicle repair categories which require state certification? A. The Automobile and Light Truck repair categories for vehicles under 10,000 pounds G.V.W. are: 1. Engine Repair 7. Electrical Systems 2. Engine Tune-up/Performance 8. Heating & Air Conditioning 3. Front End, Suspension & Steering Systems 9. Collision-Related Mechanical Repair 4. Brakes & Braking Systems 10. Unitized Body Structural Repair 5. Automatic Transmission 11. Pre-1973 Vehicles 6. Manual Transmission, Front & Rear Drive Axles The Heavy-Duty Truck repair categories for vehicles over 10,000 pounds G.V.W. are: 1. Engine Repair Gasoline 5. Suspension & Steering Systems 2. Engine Repair Diesel 6. Electrical Systems 3. Drive Train 7. Collision-Related Mechanical Repair 4. Brakes & Braking Systems Repair categories for other on-road vehicles are: 1. Motorcycle 3. Q. How do I become a certified mechanic? A. You first must pass a test for each repair category in which you want certification. You are not eligible to apply for certification until you have passed the appropriate repair category test. The application for certification is included with your test result letter. You must complete the application and return it with the appropriate fee to the Business Licensing and Regulation Division, Licensing Unit. The address is on the back of this sheet. 4. Q. What is the difference between a Master mechanic and a Specialty mechanic? A. A mechanic certified in all of the first 8 categories of automobile and light truck repair is a Master Automobile mechanic. Similarly, a mechanic certified in all of the first 6 categories of heavy-duty truck repair is a Master Heavyduty truck mechanic. Individuals having certification in Motorcycle are also given a Master status. A mechanic certified in less than the first 8 automobile and light truck categories, the first 6 heavy-duty truck repair categories or other categories is considered a specialty mechanic. 5. Q. Where and when can I take the tests? A. The Bureau of Regulatory Services offers written tests at select Secretary of State branch offices around the state with at least one branch in every county. To search for a branch office nearest you, access the Secretary of State Branch Office Locator available through the internet at: Michigan.gov/sos or Telephone: 1-888-SOS-MICH (1-888-767-6424) for assistance. There is a $6.00 fee for each test. Exams are offered on a first come, first serve basis. Exams are not available within one hour of closing. 6. Q. I have worked as a motor vehicle mechanic for many years. Do I have to take tests? A. Yes, you must pass a test for each repair category in which you want to be certified. The law does not provide a "grandfather clause." The only way to qualify for state certification is to pass the state exam or if you have passed tests administered by the National Institute for Automotive Service Excellence (ASE), you may be eligible to apply for state certification in certain categories. ASE certification alone does NOT qualify you as a state certified mechanic. Telephone the Licensing Unit at 1-888-SOS-MICH (1-888-767-6424) for further information. 2. Recreational Trailer

7.

Q. I took the state test but lost, or did not receive, my test results. How do I find out if I passed? A. If you have not received your test results after four weeks, or have lost them, you can get assistance by contacting the Licensing Unit at 1-888-SOS-MICH (1-888-767-6424). SECRETARY OF STATE BRANCH OFFICE PERSONNEL CANNOT HELP YOU. They do not have information concerning your test results.

8. Q. I took the state tests and did not pass. Can I take the tests again and will I have to pay the test fees again? A. Yes, you may retake tests you did not pass. You must pay the $6.00 test fee for each test you take. You are, however, encouraged to do additional studying or get more training before taking the tests again. 9. Q. Can a person who has a disability or difficulty with the English language take the mechanic tests? A. Yes, persons who would have difficulty taking a written test because of special needs should telephone the Licensing Unit at 1-888-SOS-MICH (1-888-767-6424).

CERTIFICATION FEES 10. Q. What does it cost to become certified? A. To become certified you must complete an application for certification (which is sent with your test result letter) and return the application with the $25.00 fee to the Licensing Unit. You may make application for certification in any number of repair categories at one time and pay a single application fee of $25.00. If you pass additional tests after you become certified and your certification is current, an amended certificate with the new categories added will automatically be mailed to you at no additional cost. 11. Q. Must I renew my certification? A. Yes, there is an annual (yearly) renewal fee of $20.00. You are responsible for notifying the Licensing Section of any address change. A renewal form will be mailed to you approximately 45 days prior to your certification expiration date. Certification renewals received after the expiration date require payment of a $10.00 late fee. If your certificate has been expired over one year, telephone 1-888-SOS-MICH (1-888-767-6424) for the proper form.

MECHANIC TRAINEE PERMITS 12. Q. What is a mechanic trainee permit? A. A mechanic trainee permit makes it possible for a non-certified mechanic to work at a repair facility to gain experience. A mechanic trainee employed by a repair facility must work under the direct supervision of a currently certified specialty or master mechanic in that specialty area. 13. Q. What are the repair categories for a mechanic trainee? A. The mechanic trainee categories are the same as those for certification. A person may obtain a trainee permit in any number of categories of repair, but cannot remain a mechanic trainee in any single repair category for more than two years. 14. Q. How do I apply for a mechanic trainee permit? A. You must complete an Application for Motor Vehicle Mechanic Trainee Permit. For an application, contact the Licensing Unit at 1-888-SOS-MICH (1-888-767-6424). The completed application must be returned with the $20.00 application fee. No fee is required if you are a state-certified mechanic with an unexpired certificate. __________________________________ If you have additional questions about the Michigan mechanic certification program or requirements, contact: Michigan Department of State Bureau of Regulatory Services Business Licensing and Regulation Division Licensing Unit Lansing, MI 48918-1210 Telephone: 1-888-SOS-MICH (1-888-767-6424) Fax: (517) 335-2810

MECHANIC STUDY GUIDES
Table of Contents Automobile & Light Truck (Vehicles under 10,000 lbs. GVW)
Engine Repair ........................................................................ p.1 Automatic Transmission........................................................ p.2 Manual Transmission, Front & Rear Drive Axles.................p.3 Front End, Suspension & Steering Systems ..........................p.4 Brakes & Braking Systems.................................................... p.5 Electrical Systems ................................................................. p.6 Heating & Air Conditioning.................................................. p.7 Engine Tuneup/Performance ................................................. p.8 Unitized Body Structural Repair ........................................... p.9 Collision-Related Mechanical Repair....................................p.10 Motorcycle Repair ................................................................. p.11 Recreational Trailer ...............................................................p.13

Heavy Duty Trucks (Vehicles over 10,000 lbs. GVW)
Engine Repair - Gasoline....................................................... p.14 Engine Repair - Diesel........................................................... p.15 Drive Train ............................................................................ p.16 Brakes & Braking Systems.................................................... p.17 Suspension & Steering Systems ............................................p.18 Electrical Systems ................................................................. p.19
Revised 7/06

MECHANIC STUDY GUIDE Engine Repair Automobile & Light Truck Repair Listed below are a number of items and subjects which make up the mechanic certification test identified above. An individual's ability to pass the certification test will depend upon the amount of knowledge the person has concerning these items. NOTE: There could be up to 5 additional pretest questions. These questions will not count but may be used on a later version of the test. Your answers to these pre-test questions will not affect your score. Since you won't know which they are, you should answer all questions. Engine Block Diagnosis & Repair - 12% Using a bore gauge Honing a newly bored cylinder Engine bore diagnosis Installing pistons in block Cleaning and assembling Cylinder Head/Valve Train Diagnosis & Repair - 21% Intake valve deposits Valve tappet clearance Valve timing understanding Valve tappet adjustment Valve guide wear Valve refacing Valve spring diagnosis Noisy lifter diagnosis Valve seats General Engine Diagnosis - 19% Oil consumption .001" cylinder leakage test Compression test Sludge in crankcase Vacuum testing Low oil pressure Crankcase blow-by diagnosis Spark plug diagnosis Piston Diagnosis & Repair - 10% Piston design Ring groove diagnosis Piston ring diagnosis Crankshaft &Camshaft Diagnosis & Repair - 15% Crankshaft end-play Journal taper diagnosis Installing cam bearings Camshaft diagnosis Crankshaft diagnosis Miscellaneous - 23% Understanding measurements to Engine Assembling procedures Diagnosing coolant bubbling Micrometer reading Bolt head markings Engine break-in Water pump diagnosis Turbocharger diagnosis Engine R&R procedures Basic carburetor diagnosis Vibration/misfire diagnosis Plastigage use

SAMPLE QUESTION: A transverse mounted engine with front wheel drive must be removed from the car. All of the following are generally recommended EXCEPT: A. B. C. D. Removing the engine and transaxle as a unit. Disconnecting the speedometer cable. Disconnecting the half-shafts. Removing the differential gears.

ANSWER: D 1

MECHANIC STUDY GUIDE Automatic Transmission Automobile & Light Truck Repair Listed below are a number of items and subjects which make up the mechanic certification test identified above. An individual's ability to pass the certification test will depend upon the amount of knowledge the person has concerning these items. NOTE: There could be up to 5 additional pretest questions. These questions will not count but may be used on a later version of the test. Your answers to these pre-test questions will not affect your score. Since you won't know which they are, you should answer all questions. Component Diagnosis - 8% Hydraulic pump Torque converter Clutch pack clearance Pump gear clearance Internal Operation - 32% Gear train end-play Clutch band servo Planetary gear set Multiple disc clutch packs Passing gear operation Lock-up converters Vacuum modulator Valve body shift valves Shift points Governor operation TPS (throttle position sensor) Operation General Diagnosis - 18% Harsh engagement Governor malfunctions Fluid diagnosis Glazed band diagnosis Fluid leak diagnosis Pressure testing Spool valve diagnosis Burned clutch diagnosis Fluid loss diagnosis Driveability Diagnosis - 28% Downshift problems Improper shifting Upshifting problems Modulator problems Shift linkage adjustment No drive diagnosis Creeps in neutral Restricted filter Noisy transmission Slipping Transmission Sluggish operation Repair Procedures - 6% Transmission remove & replace Stator support bushing wear Cooler line repair Pump to converter engagement Miscellaneous - 8% Valve identification Fluid types Transaxle knowledge Valve body components Direct drive condition SAMPLE QUESTION: It takes a moment for the car to move after the gear selector has been placed in "drive." Which of the following would cause this problem? A. B. C. D. A defective neutral safety switch. A partially plugged screen. An inoperative lock-up converter clutch. None of the above.

ANSWER: B 2

MECHANIC STUDY GUIDE Manual Transmission, Front & Rear Drive Axles Automobile & Light Truck Repair Listed below are a number of items and subjects which make up the mechanic certification test identified above. An individual's ability to pass the certification test will depend upon the amount of knowledge the person has concerning these items. NOTE: There could be up to 5 additional pretest questions. These questions will not count but may be used on a later version of the test. Your answers to these pre-test questions will not affect your score. Since you won't know which they are, you should answer all questions. Component R & R - 6%10% Cluster gear remove & replace Extension housing seal remove & replace Synchronizer replacement Transmission/Transaxle Diagnosis - 32% Fluid diagnosis Hard shifting complaints Transmission v.s. transaxle comparison Cluster gear end-play Transaxle gear recognition from picture Synchronizer problems & operation 3, 4 & 5 speed diagnosis from picture (4 questions) Overdrive operation Extension housing bushing wear Noise diagnosis Defective output shaft Final Drive - 30% Ring gear run-out Noise diagnosis Differential diagnosis Differential pinion nose angle Ring & pinion gear sets Ring & pinion backlash Pinion bearing preload Final drive ratio Pinion seal remove & replace Limited slip diagnosis Differential bearing preload Lubricant Types Axle Shaft\C.V. Repair - 10% CV boot installation Drive axle noise diagnosis (2 questions) CV joint operation Vibration Diagnosis Clutch Diagnosis & Repair - 10% Clutch disc operation Noise diagnosis Chatter diagnosis Shifting problem diagnosis Miscellaneous - 12% Bearing removal and installation procedures Drive train noise diagnosis Gear recognition Trans interlock function Understanding how direct drive & gear reduction is accomplished SAMPLE QUESTION: The main reason for making a rear end gear tooth contact pattern is to check: A. B. C. D. Carrier end-play. Carrier bearing preload. Axle gear clearance. Pinion depth.

ANSWER: D

3

MECHANIC STUDY GUIDE Front End, Suspension & Steering Systems Automobile & Light Truck Repair Listed below are a number of items and subjects which make up the mechanic certification test identified above. An individual's ability to pass the certification test will depend upon the amount of knowledge the person has concerning these items. NOTE: There could be up to 5 additional pretest questions. These questions will not count but may be used on a later version of the test. Your answers to these pre-test questions will not affect your score. Since you won't know which they are, you should answer all questions. Alignment Diagnosis - 34% "Toe" adjustment procedures Caster adjustment procedures for various suspension systems Camber understanding Camber adjusting procedures for various suspension systems Total alignment procedures Caster understanding Strut suspension alignments Tire Wear Diagnosis - 10% Tire wearing angles Inside tread wear only Cupping Feathered outside edge wear Wear on both inside & outside of tire Suspension Diagnosis - 18% Ball joint diagnosis Measuring curb height Torsion bar remove & replace Ball joint remove & replace procedure MacPherson suspensions Automatic leveling systems Steering Diagnosis - 18% Rack & pinion diagnosis Power assist diagnosis Tie rod end diagnosis Steering gear adjustment Steering linkage diagnosis Power steering system bleeding Driveability Diagnosis - 16% Pulling diagnosis Road crown compensation Wandering or darting diagnosis Shimmy & bounce diagnosis Steering wheel centering Miscellaneous - 4% Brake rotor R & R precautions Wheel bearing adjustment SAMPLE QUESTION: A car has excessive lean on turns (body roll). This could be caused by: A. B. C. D. Bad shocks. Worn sway bar bushings. Weak springs. All of the above.

ANSWER: D

4

MECHANIC STUDY GUIDE Brakes & Braking Systems Automobile & Light Truck Repair Listed below are a number of items and subjects which make up the mechanic certification test identified above. An individual's ability to pass the certification test will depend upon the amount of knowledge the person has concerning these items.

System Diagnosis - 20% Load sensing proportioning valves Brake pedal pulsation Grabbing brakes Brake lock-up Dragging brakes Combination valve Gear lube in drums Brake booster Master Cylinder Diagnosis & Repair - 9% Low fluid level Rebuilding Swollen diaphragm Sinking pedal ABS Diagnosis & Repair - 20% Pump/motor operation Safety precautions Speed sensors Wheel speed readings 3 way circuits 4 way circuits Hose replacement Drum Brake Diagnosis & Repair - 22% Drum turning, finish Single anchor Bendix type Self adjuster diagnosis Noise diagnosis Measuring Primary and secondary shoes Disc Brake Diagnosis & Repair - 16% Rotor thickness variation Rotor surface finish Caliper overhaul Brake noise Brake adjustment Measuring, lateral run-out

Repair Procedures - 13% Brake line bleeding Brake fluid diagnosis Replacing wheel bearings/races Brake adjustments SAMPLE QUESTION: A car has a spongy pedal. Which of the following could be the cause? A. B. C. D. Air in the system. An internal master cylinder leak. Worn brake pads. Warped brake disc.

ANSWER: A

5

MECHANIC STUDY GUIDE Electrical Systems Automobile & Light Truck Repair Listed below are a number of items and subjects which make up the mechanic certification test identified above. An individual's ability to pass the certification test will depend upon the amount of knowledge the person has concerning these items. NOTE: There could be up to 5 additional pretest questions. These questions will not count but may be used on a later version of the test. Your answers to these pre-test questions will not affect your score. Since you won't know which they are, you should answer all questions. OHMS Law & Electrical Symbol Recognition - 14% Ohmmeter symbol Splice symbol Resistor symbol Switch symbol Solenoid symbol Circuit breaker symbol Variable resistor symbol Lamp symbol Diode symbol LED symbol Test Methods/Meter & Equipment Usage - 11% Ohmmeter usage Voltmeter usage Ammeter usage Starting System Diagnosis - 20% Capacity/load testing Starter armature testing Starter current draw Starter relay diagnosis Voltage drop tests Circuit resistance test Battery test Starter drive diagnosis Charging System Diagnosis - 5% R & R battery properly Alternator output testing Miscellaneous Circuit Diagnosis - 32% Short to ground Regulator diagnosis Blower motor circuit diagnosis Horn circuit diagnosis Turn signal circuit Dimmer switch diagnosis Tail lamp circuit Dashlight circuit Windshield washer pump circuit Cooling fan circuit Oil pressure light circuit General - 18% Measuring current flow Voltage drop Parallel circuit diagnosis Junction block replacement E.S.D. (Electrostatic Discharge) S.I.R. (Supplemental Inflatable Restraint) Precautions SAMPLE QUESTION: The maximum allowable voltage drop across the ground circuit of the starter system is: A. B. C. D. .2 volt. .7 volt. 1/2 volt. 1 volt.

ANSWER: A

6

MECHANIC STUDY GUIDE Heating & Air Conditioning Automobile & Light Truck Repair Listed below are a number of items and subjects which make up the mechanic certification test identified above. An individual's ability to pass the certification test will depend upon the amount of knowledge the person has concerning these items. NOTE: There could be up to 5 additional pretest questions. These questions will not count but may be used on a later version of the test. Your answers to these pre-test questions will not affect your score. Since you won't know which they are, you should answer all questions. Heating & Engine Cooling System Diagnosis - 22% Leak diagnosis Low coolant in radiator Thermostat Coolant mixture Low heater output Windshield fogging Heater core hose routing Radiator cap Defrost operation Overheating General Knowledge of A/C Components & Their Functions - 16% Receiver drier Ambient temperature switch Orifice expansion tube Compressor muffler Condensor Evaporator Fixed orifice tube Halide tester General Knowledge of A/C Systems - 18% R-12 v.s. R134-a Refrigerant (understanding change between liquid & gas) Operating pressures Effect of moisture in the system Effect of outside temperature & humidity on System A/C Diagnosis - 24% H2O at air ducts Finding leaks Overcharged system Compressor clutch Gauge set readings Lack of cold air Schematic diagnosis A/C Repair Procedures - 16% Precautions when discharging system Compressor o-ring replacement Correction of excessively high pressure Compressor replacement Hose replacement Charging the system Leak detection Condensor replacement Refrigerant Recovery, Recycling & Handling - 4% CFC's (Chlorofluorocarbons) and their affect on the environment Recycle or replace R-12 and R-134a SAMPLE QUESTION: An A/C control system has an apparent vacuum leak. Which of the following is the best way to locate the leak? A. B. C. Feel around the suspected line or component. Trace the origin of the hissing sound. Install known good hoses and components in place of the original components. Spray water on the suspected areas.

D.

ANSWER: B 7

MECHANIC STUDY GUIDE Engine Tuneup/Performance Automobile & Light Truck Repair Listed below are a number of items and subjects which make up the mechanic certification test identified above. An individual's ability to pass the certification test will depend upon the amount of knowledge the person has concerning these items. Diagnosis (starting system & misc.) 18% Engine timing Slow cranking diagnosis Circuit resistance checks Engine vacuum Catalytic converter Cylinder leakage Compression test Emission Control Systems - 25% EGR operation Evaporative emission control system Hydrocarbon levels Oxides of nitrogen O2 sensor operation Fuel vapor recovery system Carbon monoxide levels Exhaust analyzer readings Engine timing & effect on emissions Catalytic converter's purpose SAMPLE QUESTION: In automotive computers, this memory contains information that tailors the computer to the vehicle. A. B. C. D. Programmable Read Only Memory (PROM). Controllable Access Memory (CAM). Random Access Memory (RAM). None of the above.

Computer Control & Sensor Basics - 24% ROM (Read Only Memory) Fault codes Maintaining stoichiometric balance Closed loop Oxygen sensor diagnosis Knock sensor function Self diagnosis Hall sensor pattern reading Types of meters to use Scan tool usage TPS operation Ignition Systems - 13% Scope pattern diagnosis Setting timing No spark diagnosis Spark plug voltage requirements Carburetor & Fuel Injection - 10% Injector pulse width Fuel line replacement E.F.I. principals "Heavy float" symptoms Types of injection systems Performance Basics - 10% Causes of detonation Spark plug diagnosis Dirty air cleaner symptoms Causes of a lean mixture Influences on performance

ANSWER: A

8

MECHANIC STUDY GUIDE Unitized Body Structural Repair Automobile & Light Truck Repair Listed below are a number of items and subjects which make up the mechanic certification test identified above. An individual's ability to pass the certification test will depend upon the amount of knowledge the person has concerning these items. Steels (Characteristics & Identification) 12% UHSS (Ultra High Strength Steel) HSS (High Strength Steel) Tensile strength Identification of various steels Pulling (Straightening) - 8% Overpulling How to minimize tearing Anchoring Welding - 20% MIG Oxyacetylene Brazing Shielding gas Weld quality Electrode wire use Precautions Types of welds Types of welders Repairing Structural Components - 25% A-pillars & B-pillars Location of welds Sectioning Joints to use Corrosion protection Weld-through primers Glass installation Measuring/Damage Analysis - 21% Point to point Indirect damage Direct damage Secondary damage Primary damage Datum plane Asymmetrical dimensions Vehicle centerline Centering gauges Loaded measurement Unitized Body General Understanding 14% Crush zones Design features which initiate the crush process Space frame construction Manufactures' tolerances One-time fasteners SAMPLE QUESTION: Two-part epoxy primers: A. B. C. Provide corrosion protection close to OEM E-coat. Have an indefinite pot life. Should be used on structural parts only if a lacquer primer surfacer is not available. All of the above.

D.

ANSWER: A

9

MECHANIC STUDY GUIDE Collision-Related Mechanical Repair Automobile & Light Truck Repair Listed below are a number of items and subjects which make up the mechanic certification test identified above. An individual's ability to pass the certification test will depend upon the amount of knowledge the person has concerning these items. Steering Components - 12% Adjustments Rack & Pinion Power Steering Heating & Cooling - 10% General Questions Electrical - 30% Turn Signals Horn Circuit Lights Starter system Drive Train - 28% Bearings Noise Diagnosis Transaxle Transmission Linkage Brakes - 10% Brake Lines Hydraulics Measuring Techniques Miscellaneous - 10% Steering Columns Fuel Leaks SAMPLE QUESTION: The mechanic notices antifreeze under the car after completing collision repairs. What should he or she do next? A. B. C. D. Remove the radiator and pressure test. Warm up the engine thoroughly then recheck. Visually inspect the vehicle for signs of a leak. Nothing, it is normal for the cooling system to leak after a collision.

ANSWER: C

10

MECHANIC STUDY GUIDE Motorcycle Repair Automobile & Light Truck Repair Listed below are a number of items and subjects which make up the mechanic certification test identified above. An individual's ability to pass the certification test will depend upon the amount of knowledge the person has concerning these items. Fuel Systems - 10% Causes of a lean mixture Carburetor systems; float, power, choke, etc. Spark plug diagnosis Causes of a rich mixture Idle mixture adjustment Diagnosis of a worn needle and seat Crankcase flooding diagnosis Carburetor jets Understanding the idle circuit on a slide type Carburetor Skill in Measuring - 13% Measuring piston ring grooves Crankshaft end-play Using plastigage Using a dial indicator Spark plug gap Shaft run-out Cylinder bore measurements Understanding decimal equivalents up to 1/1000" Piston ring end-gap Reading a micrometer Understanding metric system measurements Repair Skills - 17% Cylinder head bolt torque procedure Compression test Repairing float valve wear Replacing a steel bearing race in aluminum case Replacing the master link in a drive chain Valve adjustment Finishing cylinder walls at overhaul Fitting pistons to the cylinder Cylinder leak down test Valve guide wear Oil pump installation Breaker point alignment Checking for bent forks Diagnosis - 17% Poor running with black smoke under heavy throttle Transmission shifting problems Backfire Spark plug fouling and diagnosis Undershifting or jumping out of gear problem Coil diagnosis Hard starting or no start problems Low oil pressure Restricted air intake Rough running and backfiring problems Ignition & Electrical - 20% C.D.I. systems compared to point systems Flywheel stampings Splicing electrical connections Continuity testing Checking voltage in a system Diagnosing turn signal circuits Master cylinder operation Point burning What tool is necessary to time a flywheel Timing advance Alternator output problems Diagnosing a condenser Battery charging rates Zener diode operation (continued)

11 MECHANIC STUDY GUIDE

Motorcycle Repair Automobile & Light Truck Repair

General - 23% Sticking hydraulic forks Deglazing cylinders Understanding the 4-stroke cycle engine Clutch operation and diagnosis Full floating piston pins Oil pressure relief valve operation Alternator or generator operation Brake system operation Adjusting steering stem bearings Piston slap Camshaft operation What is a hydrometer used for Front drum bakes Spark plug "reach" Oil consumption SAMPLE QUESTION: Oil circulation in the engine: A. B. C. D. Goes from sump to oil pump to bearings to filter. Goes from filter to bearings to oil pump. Goes from bearings to filter to oil pump to sump. Goes from sump to oil pump to filter to bearings.

ANSWER: D

12

MECHANIC STUDY GUIDE Recreational Trailer Automobile & Light Truck Repair Listed below are a number of items and subjects which make up the mechanic certification test identified above. An individual's ability to pass the certification test will depend upon the amount of knowledge the person has concerning these items.

Electrical Diagnosis - 36% Trailer tail lamps Ground wire problems Turn signal circuits Determine voltage drop Trailer stop lamps Brake controllers 4-Wire connectors Current supply for trailer brakes Electrical symbols Flasher diagnosis Color codes Causes of blown fuses Current flow/resistance Brake Diagnosis - 26% Loss of brakes Grabby brakes Dragging brakes Erratic braking, surging Pull to one side during braking Adjusting trailer brakes Brake shoe recognition Springs/Hitches - 16% Leaf springs Equalizing hitches Adjustment of hitches Types of trailer springs Spring maintenance General Knowledge - 12% Surge brakes Reducing sway Wheel bearing adjustment Hydraulic brake lines Metric measurements Tire wear diagnosis Wheels/Hubs - 10% Wheel bearing diagnosis Wheel bolt torque pattern

SAMPLE QUESTION: Current flow resistance is decreased when: A. B. C. D. Wire length is increased. Wire diameter is decreased. Corroded terminals are replaced. All of the above.

ANSWER: C

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MECHANIC STUDY GUIDE Engine Repair - Gasoline Heavy Duty Truck Listed below are a number of items and subjects which make up the mechanic certification test identified above. An individual's ability to pass the certification test will depend upon the amount of knowledge the person has concerning these items.

Engine Mechanical Components - 16% Cylinder blocks Pistons Fuel pumps Spark plugs Governors Cylinder heads Diagnosis - 30% Engine Miss Compression test diagnosis Rough idle Engine knocks Power loss Blue smoke Overheating Basic Procedures - 22% Grinding valves Starting a flooded engine How to measure cam lobe wear Measuring plug wire resistance Engine assembly Understanding bolt markings Valve Adjustment Skills In Measuring - 14% How to check cylinder head flatness How to check crankshaft end-play Reading a micrometer Reading plastigage Measuring main and rod journals System Operation - 18% Understanding how engines operate Purpose for checking clearances Understanding carburetor operation Cooling system operation Engine timing Ignition systems

SAMPLE QUESTION: What are the minimum and maximum measurements of a shaft given as 3.750 plus or minus .010? A. 3.650 - 3.850 B. 3.749 - 3.751 C. 3.740 - 3.780 D. 3.740 - 3.760 ANSWER: D

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MECHANIC STUDY GUIDE Engine Repair - Diesel Heavy Duty Truck Listed below are a number of items and subjects which make up the mechanic certification test identified above. An individual's ability to pass the certification test will depend upon the amount of knowledge the person has concerning these items.

Engine Components - 24% Detroit blower rotor clearance adjustment Piston rings Piston ring grooves After cooling - benefits Bolt grade recognition Lube oil coolers Turbo charger operation Valve bridge function Diagnosis - 34% Turbo problem diagnosis Coolant in crankcase Smoke problem diagnosis Engine operating temperature Low oil pressure Engine tear-down diagnosis Blow-by Crankshaft diagnosis Engine Miss Lube & Fuel - 10% Direct injection Leaky fuel lines Restarting and engine that has run out of fuel Fuel Filters Skills In Measuring - 12% Tools for measuring Plastigage reading Cylinder taper Reading a micrometer Crankshaft End-play

Miscellaneous - 20% Using a vacuum gauge fuel shut-off solenoid Idle speed Detroit diesel R.P.M. setting Understanding 2-stroke, 4-stroke engines Valve seat width Valve lash adjustment Overheating SAMPLE QUESTION: A diesel engine misses at all speeds and there is a puff of smoke when it misfires. What is the most likely cause of this problem? A. B. C. D. Erratic governor action. Stale fuel. A miscalibrated pump. A sticking nozzle.

ANSWER: D

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MECHANIC STUDY GUIDE Drive Train Heavy Duty Truck Listed below are a number of items and subjects which make up the mechanic certification test identified above. An individual's ability to pass the certification test will depend upon the amount of knowledge the person has concerning these items.

Clutch Diagnosis - 10% Causes of hard shifting Free play Hydraulic clutch fluid Reason for clutch slipping Clutch Components - 12% Clutch brake Pilot bearing Linkage adjustment Axle & Driveline Diagnosis - 22% Adjusting driveline angles Pinion bearing preload Axle shaft replacement U-Joint angles Air shift controls Two-Speed planetary axle Axle & Drive line Components - 22% Ring and pinion backlash Inter-axle differential lock Drive shaft removal Pinion bearing preload adjustment U-joint replacement Differential side bearing preload Transmission Diagnosis - 22% Causes of hard shifting Gear slipout Slow shifting problem in a twin countershaft Transmission Transmission Components - 14% Synchronizers Seal installation 10-Speed twin countershaft operation 4 & 5-Speed synchronized transmissions Transmission Interlock

SAMPLE QUESTION: Which of the following could cause driveline vibration? A. B. C. D. Bad engine mounts. Crossed plug wires. Over lubed universal joints. All of the above

ANSWER: A

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MECHANIC STUDY GUIDE Brakes & Braking Systems Heavy Duty Truck Listed below are a number of items and subjects which make up the mechanic certification test identified above. An individual's ability to pass the certification test will depend upon the amount of knowledge the person has concerning these items. Basic Knowledge - 20% Inversion valve function Anti-skid brakes Hydraulic brake line material Air brake hand valve Brake chatter Vacuum booster operation Air brake line routing Engine (Jacobs) brake Air over hydraulic systems Repair Skills, Air Brakes - 8% Finding air leaks Adjusting cam actuated brakes Brake linkage lubrication Air line material Repair Skills, Hydraulic Brakes - 10% Wheel cylinder assembly Power booster Master cylinder residual valve Master cylinder operation Diagnosis, Air Brakes - 34% "S" cam brakes Air pressures for fail-safe brakes Cause of excessive air pressure Dual diaphragm brake chamber operation Compressor operation Tractor protection valves Air brake systems operation Inoperative trailer brakes Straight truck air line and operation Trailer brakes won't release Diagnosis, Hydraulic Brakes - 14% Causes of a pulsating pedal Brake booster operation Swollen master cylinder diaphragm Cause of gear lube inside brake drums Brake lining wear diagnosis Grabbing brakes 17 Basic Repair Procedures - 14% Spring brake repairs Pushrod travel Air reservoirs Slack adjuster and pushrod angle Grease-soaked brake linings SAMPLE QUESTION: Which of the following should a mechanic do before taking apart a spring-type parking brake? A. B. C. D. Fill the air reservoir. Remove the quick release valve. Remove the diaphragm clamp. Cage the spring.

ANSWER: D

MECHANIC STUDY GUIDE Suspension & Steering Systems Heavy Duty Truck Listed below are a number of items and subjects which make up the mechanic certification test identified above. An individual's ability to pass the certification test will depend upon the amount of knowledge the person has concerning these items. Steering System Diagnosis - 18% Hard steering complaint Recovering from a turn Noise in the power steering unit Wheel shimmy Tie rod end wear Oil foaming in power steering system Suspension Diagnosis - 14% Air ride suspension operation Leaf spring failure Tire problems Hendrickson suspensions Torque rods Tandem axle alignment Wheel Alignment - 12% Causes of uneven and rapid tire wear Front end alignment procedure Toe-in adjustment Tire wear diagnosis Caster/Camber - 6% How to adjust caster on a solid axle Recognize extreme conditions from a picture Basic Steering System Knowledge - 32% Front suspension components Steering gears Wheel bearings Steering Wheel freeplay Steering kunckle wear Installing kingpin bushings Sector shaft adjustment Power steering pump replacement Basic Suspension Knowledge - 18% Cap screw head markings Suspension adjustment Equalizing beam suspensions Adjustable trailer axles 18 SAMPLE QUESTION: A tractor trailer rig with tandems on both units rides and handles good when loaded. When unloaded, the rig wonders. Which of the following is the most likely cause of this condition? A. B. C. D. Misaligned trailer tandems. Wrong caster settings. Misaligned tractor tandems. Wrong toe setting.

ANSWER: B

MECHANIC STUDY GUIDE Electrical Systems Heavy Duty Truck Listed below are a number of items and subjects which make up the mechanic certification test identified above. An individual's ability to pass the certification test will depend upon the amount of knowledge the person has concerning these items. System Diagnosis - 22% Lamp circuits High & low beam headlamp questions Dash lights Alternator circuits Windshield wiper circuit Oil pressure sending unit Circuit diagnosis Horn Circuits General - 10% Batteries Fusible links Hydrometer use Jump starting Fuse box replacement Vehicle Lighting - 18% Turn signal circuit Tail lamp circuit Head lamp circuit Dash light circuit Clearance lights Starting Systems - 24% Battery hook-ups Starter circuit resistance Specific gravity readings Solenoid problems Starter draw test Starter drives Starter no-load test Charging Systems - 12% Low or unsteady alternator output Alternator Circuitry Overcharged battery problem Alternator amperage limit Test Methods & Equipment - 14% Voltmeter use Ohmmeter use Circuit testing Verifying a circuit drain Alternator rotor tests Ammeter use SAMPLE QUESTION: The alternator output current is 0 amps. What could cause this condition? A. B. C. D. An open diode. A grounded rectifier bridge. An open rotor winding. All of the above

ANSWER: C

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