Vehicle Maintenance

This test evaluates your understanding of essential truck maintenance procedures, ensuring safe, efficient, and long-lasting vehicle performance. Regular maintenance helps prevent breakdowns, improves fuel efficiency, and ensures compliance with safety regulations.

Topics Covered:

Routine pre-trip and post-trip inspections
Common truck maintenance tasks (oil changes, tire checks, brake inspections)
Identifying warning signs of mechanical issues
Proper recordkeeping for maintenance and repairs
Best practices for maintaining engine, transmission, and suspension systems

Passing this test demonstrates your ability to keep your truck in top condition, reducing downtime and ensuring safety on the road.

1 / 50

What is a sign of potential trouble with a vehicle’s suspension system?

A smooth ride

Uneven tire wear

Frequent refueling

Loud engine noise

2 / 50

Why should air filters be checked regularly?

To maintain proper air flow to the engine

To check for water in the fuel system

To ensure the brakes are functioning properly

To maintain the correct tire pressure

3 / 50

What should be inspected to ensure a vehicle’s lights are functioning properly?

Battery level

Light lenses and reflectors

Fuse box

Tire pressure

4 / 50

Why is it important to ensure that the battery connections are tight and clean?

To prevent power loss

To avoid corrosion

To increase battery life

All of the above

5 / 50

What is the proper way to inspect belts in the engine compartment?

Checking for tightness and signs of wear

Measuring the length of the belts

Listening for noises while the engine is running

Checking the color of the belts

6 / 50

How should slack adjusters be checked for proper adjustment on a vehicle with air brakes?

By measuring the distance they move when pulled

By listening for air leaks

By checking the air pressure gauge

By ensuring the vehicle does not move in neutral

7 / 50

What is the primary reason for checking coolant levels regularly?

To prevent engine overheating

To improve air conditioning efficiency

To ensure proper windshield wiper fluid levels

To enhance fuel economy

8 / 50

What should be done if a warning light stays on after starting the vehicle?

Continue driving to monitor if the light goes off

Stop the vehicle immediately to check for potential problems

Turn the engine off and on again to reset the system

Drive to the nearest service station for a diagnostic

9 / 50

Which of the following is an indicator of potential brake problems?

Squeaking noise when accelerating

Vibrations in the steering wheel

Oil level slightly below maximum

Pulling to one side when braking

10 / 50

What is the correct procedure to check hydraulic brakes for leaks?

Pressing the brake pedal and holding for five seconds

Turning the engine off and waiting for an hour

Checking brake fluid level with the engine running

Inspecting the brake lines before starting the vehicle

11 / 50

What is the consequence of not having proper fire extinguishers in a commercial vehicle?

Reduced vehicle performance

Immediate vehicle impoundment

Possible fines and penalties

Decreased fuel efficiency

12 / 50

How often should the oil level be checked?

Once a month

Before starting a long trip

After every fuel stop

Weekly

13 / 50

What should be checked regularly to ensure proper tire pressure?

Air compressor

Brake pads

Tire tread

Tire inflation

14 / 50

Which part of the vehicle should be checked for cracks, dents, or leaks?

Tires

Exhaust system

Cargo area

Steering wheel

15 / 50

What is the most important reason for doing a vehicle inspection?

To ensure the comfort of the driver

To increase fuel efficiency

To ensure the vehicle is safe to drive

To comply with state regulations

16 / 50

Why should you regularly check the tightness of your vehicle’s lug nuts?

To ensure the wheels are balanced

To prevent the wheels from detaching

To improve handling

To enhance brake performance

17 / 50

What function does coolant perform in a vehicle’s engine?

Lubricates the engine parts

Cleans the engine components

Prevents the engine from overheating

Increases the engine's power

18 / 50

Why is it important to ensure that mud flaps are properly secured?

To prevent them from dragging on the ground

To improve fuel efficiency

To enhance the vehicle's appearance

To increase the engine's lifespan

19 / 50

What is one of the first signs of wheel bearing failure?

A high-pitched squeal when accelerating

A clicking noise when turning

Irregular tire wear

The steering wheel feels loose

20 / 50

Which of the following should be checked to ensure the steering system is functioning properly?

The brake lights

The exhaust system

The steering fluid level

The windshield wipers

21 / 50

What does it mean if your vehicle’s exhaust system emits black smoke?

The air filter needs to be replaced

It is operating efficiently

There might be an oil leak

The fuel is burning incompletely

22 / 50

How should you inspect your truck’s belts for wear and tear?

Check for fraying edges

Measure the belt's thickness

Look for shiny spots

Listen for noises when the engine is running

23 / 50

What is the primary purpose of conducting a pre-trip inspection?

Finding minor issues before they become major

Ensuring the vehicle looks presentable

Checking the vehicle's oil level only

Making sure all paperwork is in order

24 / 50

Which of the following is a critical engine fluid to check regularly?

Windshield washer fluid

Power steering fluid

Coolant

Brake fluid

25 / 50

What is an effective way to check for a leak in air brake systems?

Listening for hissing sounds

Checking the color of the brake fluid

Measuring tire tread depth

Inspecting the engine oil level

26 / 50

Which of the following is a sign of potential brake problems?

Squeaking noises when turning

Vibrations in the steering wheel

A vehicle pulling to one side when braking

Increased fuel consumption

27 / 50

What should you do if you discover a leak in the hydraulic brake system?

Continue driving but use the brakes less

Check the fluid level and refill if necessary

Stop driving and arrange for repairs

Tighten the hydraulic cap

28 / 50

What is the most important reason for doing a vehicle inspection?

To comply with federal regulations

To ensure the vehicle is comfortable to drive

Safety

To improve fuel efficiency

29 / 50

How often should tire pressure be checked?

Once a week

Before every trip

Once a month

Every six months

30 / 50

What should you check for when inspecting hoses?

Color changes

Soft spots, cracks, or bulges

Length

Smoothness

31 / 50

Why is it important to check mirror and windshield cleanliness?

To reduce the risk of sun glare

To ensure clear visibility

To improve the vehicle’s appearance

To prevent ice formation

32 / 50

What should you do if you discover a fuel leak during a pre-trip inspection?

Continue with your trip and monitor the situation

Report it but continue with your trip

Park the vehicle and report it immediately

Only report it if the leak worsens

33 / 50

What is a sign of a potential problem with your vehicle’s electrical system?

A burning smell

The radio turns off and on

Dimming headlights

All of the above

34 / 50

Why should hoses be checked during a pre-trip inspection?

To ensure they are properly color-coded

To check for bulges, cracks, or leaks

To verify their length

To make sure they are dry

35 / 50

What is an indicator of a damaged suspension system?

Uneven tire wear

Bright headlight beams

High fuel efficiency

Rapid steering response

36 / 50

What is the proper inflation pressure for your vehicle’s tires usually determined by?

The type of tire

The weight of the vehicle

The manufacturer’s specification

The age of the tire

37 / 50

Why is it important to ensure the exhaust system is properly mounted and secure?

To prevent loss of engine power

To avoid toxic fumes entering the cab

To reduce fuel consumption

To decrease engine noise

38 / 50

How can you test for a leaking air compressor?

Apply the brakes and listen for a hissing sound

Check the air pressure gauge for rapid loss of pressure

Listen for unusual noises when the compressor is running

All of the above

39 / 50

What does it mean if your brake pedal goes to the floor?

The brakes are in perfect condition

It indicates worn brake pads

Possible brake fluid leakage or air in the braking system

The brakes are overheating

40 / 50

How should you check if your vehicle’s headlights are working properly?

Turn them on in a dark area

Flash them at another vehicle

Check during the day

Use a reflective surface at night

41 / 50

What could happen if the coolant level in your vehicle is too low?

The transmission could slip

The vehicle could overheat

The brakes could fail

The headlights could dim

42 / 50

When inspecting belts in the engine compartment, what should you check for?

Correct routing only

Tension and wear only

Leaks only

Correct routing, tension, and wear

43 / 50

Which of the following is a correct method to check for proper power steering fluid level?

Checking while the engine is off

Checking while the engine is running

Checking immediately after turning off the engine

Checking with the engine cold

44 / 50

What is the purpose of a slack adjuster?

To adjust the steering wheel

To regulate fuel consumption

To adjust the tension on the brakes

To measure tire pressure

45 / 50

How often should a driver perform a pre-trip inspection?

Once a week

Before each trip

Once a month

Every 100 miles

46 / 50

Which of the following should be checked for leaks?

Fuel system

Cooling system

Air system

All of the above

47 / 50

What is the minimum tread depth for front tires on a commercial vehicle?

1/32 inch

2/32 inch

4/32 inch

5/32 inch

48 / 50

When checking the engine compartment, what should NOT be checked?

Oil level

Windshield washer fluid level

Tire tread depth

Coolant level

49 / 50

Which of the following is a sign of potential brake problems?

Squeaking noises

Vehicle pulling to one side when braking

Brake pedal feels spongy

All of the above

50 / 50

What is the most important reason for doing a vehicle inspection?

Safety

Avoiding traffic violations

Improving fuel economy

Preventing wear and tear

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