Automobile Mechanics: Answer Key (North American Division)

Overview & requirementsAnswer Key (General Conference)Answer Key (North American Division)

1. Properly start an automobile or light truck engine with an automatic transmission, and then one with a standard transmission. Briefly explain why it is necessary for the engine to have the proper oil, water, fuel, and battery pressures and levels for proper engine operation.

2. Briefly describe how a keyless ignition system functions. Properly start an automobile or light truck with a push button start/stop assembly.

3. Briefly explain the following concepts:

3a. The principles of four-cycle engine vs. a two-cycle engine.

3b. The difference between a gasoline and a diesel engine.

3c. The major differences between carburetor fuel systems and fuel-injection systems.

3d. The principles of an electric vehicle.

4. What is an ECU? Give three practical examples of its use.

5. Briefly explain the function of the following:

5a. Engine: crankshaft, connecting rods, pistons, camshaft, valves, oil pump, carburetor, fuel injectors, ignition distributor, fuel distributor, electrical system including alternator, battery, and regulator

5b. Transmission: The difference between standard transmission and automatic transmission, and how the engine torque is transmitted to both kinds of transmissions; the purpose of overdrive

5c. Drivetrain: The difference between rear wheel drive, front wheel drive, and all-wheel drive

5d. Brakes: The difference between drum brakes and disk brakes, standard brakes and power brakes, and the parking brake

6. Describe two techniques used to measure the tread depth of a tire.

7. What is a tire pressure gauge? Briefly describe:

7a. where to check for the recommended tire pressure

7b. the process of adjusting the tire pressure as necessary

7c. what takes place when the tire pressure is low

8. How often should the engine oil, transmission oil, and cooling fluid be changed?

9. Give some pointers on proper care of the vehicle and its finish, both interior and exterior.

10. Be able to describe and locate each of the following items, if equipped.

10a. Fuel Pump

10b. Gaskets

10c. Muffler

10d. Spark Plugs

10e. Timing Belt

10f. Water Pump

10g. Radiator

10h. Catalytic Converter

10i. Paddle Shifters

10j. Single/Dual Exhaust

10k. Cruise Control

10l. Suspension (Shocks & Struts)

10m. Brake Assist

10n. Air Bags

10o. Keyless Entry

10p. Fuse Box

10q. Master Cylinder

11. Perform typical automotive maintenance as listed below:

11a. Check engine and transmission oil levels.

11b. Check water/antifreeze level. Change and flush the cooling system.

11c. Change engine oil and filter.

11d. Change a tire, following proper safety procedure.

11e. Lubricate the chassis according to the vehicle service manual.

11f. Check windshield wipers and replace if necessary.

11g. Check windshield wiper fluid reservoir and adjust fluid levels as necessary.

11h. Check power steering fluid levels.

11i. Check front, rear, and turning signal lights.

11j. Check air filter and replace if necessary.

11k. Check cabin filter and replace if necessary.

References

Adapted from AY Honors/Automobile Mechanics/Answer Key 2 on the Pathfinder Wiki, licensed under CC BY-SA 3.0. See the original page's history for its authors.
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