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Answered
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Question 1 of 14

1. Question

If you do not hear a clicking sound when coupling your tractor and trailer, this could indicate which component has not closed properly?

Release arm

Locking jaws

Skid plate

Mounting bolts

Correct

Incorrect

Hint

Locks protect.
Question 2 of 14

2. Question

What are signs of a drive shaft malfunction?

Clunking sounds

Vehicle shaking

Both are correct

Correct

Incorrect
Question 3 of 14

3. Question

If you see your tractor is leaning to one side, this could signal that which of the following has malfunctioned?

Clutch

Transmission

Brakes

Leaf spring suspension

Correct

Incorrect
Question 4 of 14

4. Question

What two senses can you use to help identify and diagnose your brakes are fading or faded?

Sight/Hearing

Smelling/Feeling

All of these senses are used.

Correct

Incorrect
Question 5 of 14

5. Question

In most cases, what is the first sense that would help you identify burning oil?

Sight

Smell

Feeling

Correct

Incorrect
Question 6 of 14

6. Question

What things should you check during a trip?

Check your maps and directions and the weather report.

Check load stability by slightly swerving left to right in your lane.

Watch gauges and mirrors and use your senses to check for problems.

Correct

Incorrect

Hint

The nose knows.
Question 7 of 14

7. Question

Which of these will happen if a tire blows out at highway speeds?

A vibrating feeling.

A loud hissing sound.

A rapid drop in speed to below 20 mph.

Correct

Incorrect

Hint

You may only feel it.
Question 8 of 14

8. Question

In a four-stroke diesel engine, fuel is injected into the cylinder during the:

compression stroke.

power stroke.

exhaust stroke.

Correct

Incorrect

Hint

Air gets hotter as it’s compressed.
Question 9 of 14

9. Question

An en route inspection should include checking:

The cargo securement.

The tires.

Both of these.

Correct

Incorrect

Hint

Check the safety-critical items.
Question 10 of 14

10. Question

What kinds of things should you inspect during a trip?

Gauges, brakes, lights, tires, and cargo securement.

Gauges, brakes, lights, pumps, and hoses.

Gauges, exhaust, lights, cargo securement, and radio.

Correct

Incorrect

Hint

All the safety-critical items.
Question 11 of 14

11. Question

Why can a damaged exhaust system be hazardous to you?

Excessive noise can damage your hearing.

Poisonous fumes can enter the cab or sleeping compartment.

The exhaust can pollute the environment.

Correct

Incorrect

Hint

The exhaust system helps remove toxic gases produced by the engine.
Question 12 of 14

12. Question

In your pre-trip inspection, you are checking your steering and exhaust systems. Which of these problems should be fixed before the vehicle is driven?

Oil on the tie rod.

Steering play in excess of 10 degrees.

White smoke from the exhaust pipe before the vehicle warms up.

Correct

Incorrect

Hint

Steer safely.
Question 13 of 14

13. Question

When should you review the post-trip inspection report from the previous driver?

You should review it once a week.

It doesn't have to be reviewed.

You should review it during your pre-trip inspection.

Correct

Incorrect

Hint

What happened to the last person who drove this vehicle?
Question 14 of 14

14. Question

When you inspect the air lines, which sense should you use to check for air leaks?

Hearing

Sight

Smell

Correct

Incorrect

Hint

Hiss…

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Quiz Summary

0 of 14 Questions completed

Questions:

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Results

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Time has elapsed

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You did not pass the Diagnosis of Malfunctions Quiz!

Please retake the test.
CONGATULATIONS!

You passed the Diagnosis of Malfunctions Quiz!

1
2
3
4
5
6
7
8
9
10
11
12
13
14

Current
Review
Answered
Correct
Incorrect

Question 1 of 14

1. Question

If you do not hear a clicking sound when coupling your tractor and trailer, this could indicate which component has not closed properly?

Release arm

Locking jaws

Skid plate

Mounting bolts

Correct

Incorrect

Hint

Locks protect.
Question 2 of 14

2. Question

What are signs of a drive shaft malfunction?

Clunking sounds

Vehicle shaking

Both are correct

Correct

Incorrect
Question 3 of 14

3. Question

If you see your tractor is leaning to one side, this could signal that which of the following has malfunctioned?

Clutch

Transmission

Brakes

Leaf spring suspension

Correct

Incorrect
Question 4 of 14

4. Question

What two senses can you use to help identify and diagnose your brakes are fading or faded?

Sight/Hearing

Smelling/Feeling

All of these senses are used.

Correct

Incorrect
Question 5 of 14

5. Question

In most cases, what is the first sense that would help you identify burning oil?

Sight

Smell

Feeling

Correct

Incorrect
Question 6 of 14

6. Question

What things should you check during a trip?

Check your maps and directions and the weather report.

Check load stability by slightly swerving left to right in your lane.

Watch gauges and mirrors and use your senses to check for problems.

Correct

Incorrect

Hint

The nose knows.
Question 7 of 14

7. Question

Which of these will happen if a tire blows out at highway speeds?

A vibrating feeling.

A loud hissing sound.

A rapid drop in speed to below 20 mph.

Correct

Incorrect

Hint

You may only feel it.
Question 8 of 14

8. Question

In a four-stroke diesel engine, fuel is injected into the cylinder during the:

compression stroke.

power stroke.

exhaust stroke.

Correct

Incorrect

Hint

Air gets hotter as it’s compressed.
Question 9 of 14

9. Question

An en route inspection should include checking:

The cargo securement.

The tires.

Both of these.

Correct

Incorrect

Hint

Check the safety-critical items.
Question 10 of 14

10. Question

What kinds of things should you inspect during a trip?

Gauges, brakes, lights, tires, and cargo securement.

Gauges, brakes, lights, pumps, and hoses.

Gauges, exhaust, lights, cargo securement, and radio.

Correct

Incorrect

Hint

All the safety-critical items.
Question 11 of 14

11. Question

Why can a damaged exhaust system be hazardous to you?

Excessive noise can damage your hearing.

Poisonous fumes can enter the cab or sleeping compartment.

The exhaust can pollute the environment.

Correct

Incorrect

Hint

The exhaust system helps remove toxic gases produced by the engine.
Question 12 of 14

12. Question

In your pre-trip inspection, you are checking your steering and exhaust systems. Which of these problems should be fixed before the vehicle is driven?

Oil on the tie rod.

Steering play in excess of 10 degrees.

White smoke from the exhaust pipe before the vehicle warms up.

Correct

Incorrect

Hint

Steer safely.
Question 13 of 14

13. Question

When should you review the post-trip inspection report from the previous driver?

You should review it once a week.

It doesn't have to be reviewed.

You should review it during your pre-trip inspection.

Correct

Incorrect

Hint

What happened to the last person who drove this vehicle?
Question 14 of 14

14. Question

When you inspect the air lines, which sense should you use to check for air leaks?

Hearing

Sight

Smell

Correct

Incorrect

Hint

Hiss…