AY Honors/Automobile Mechanics/Answer Key 2

Automobile Mechanics

Skill Level

2

Year

1928

Version

25.11.2024

Approval authority

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