1.To test the trailer service brakes you should:

A. Lightly test brakes at 5 mph
B. Apply hand control and check to see if you feel the trailer brakes come on
C. Depress the brake pedal
D. Release air to the brakes

2.It is dangerous to unlock the pintle hook with the dolly still under the rear trailer because:

A. The dolly tow bar may fly up
B. The brakes might release
C. The kingpin might break off
D. The fifth wheel might not be aligned

3.When coupling twin trailers, you should release the dolly brakes by:

A. Dropping the trailer onto the fifth wheel
B. Opening the air tank petcock
C. Letting the air out of the brake line
D. Pushing the air release valve on the dash

4.When connecting the converter dolly to the rear trailer, you should remember to:

A. Make sure trailer brakes are locked
B. Make sure trailer height is correct
C. Raise the landing gear slightly off the ground
D. All of the above

5.When coupling the rear trailer, the correct trailer height is:

A. Six inches of space between the upper and lower fifth wheel
B. Slightly lower than the fifth wheel
C. When the locking jaws are closed around the kingpin
D. The kingpin touches the fifth wheel

6.To uncouple the converter dolly you should:

A. Disconnect safety chains, lower the landing gear and chock the wheels
B. Chock the wheels, lower the landing gear and disconnect safety chains
C. Lower the landing gear, disconnect safety chains, and chock the wheels
D. Chock the wheels, disconnect safety chains and lower the landing gears

7.When pulling triple trailers, always put the heaviest trailer:

A. In the front
B. In the rear
C. In the middle
D. It doesn’t make a difference

8.When inspecting doubles, the shut off valves at the rear of the trailer should be:

A. Open at the rear of front trailer, open at the rear of the last trailer
B. Open at the rear of front trailer, closed at the rear of the last trailer
C. Closed at the rear of front trailer, closed at the rear of the last trailer
D. None of the Above

9.To check for air flow to the last trailer:

A. Pull forward and step on brake pedal
B. Open emergency shut off valve and listen for escaping air
C. Step on brake pedal and watch for brake lights
D. Test emergency brake lines on level surface

10.To uncouple double trailers, you should park your rig:

A. On a slight incline
B. On level ground
C. In the company parking lot
D. On a soft surface

11.You should test your tractor protection valve to avoid:

A. The emergency brakes coming on due to loss of air
B. The loss of air from the air hose
C. The loss of air from your trailer brakes
D. All of the above

12.When pulling triple trailers, which unit is more likely to roll over:

A. The front trailer
B. The middle trailer
C. The last trailer
D. The tractor

13.The stopping distance for a tractor trailer traveling 55 mph on dry pavement is:

A. Longer than a football field, about 300 feet
B. Two football fields, about 600 feet
C. Two thirds of a football field, about 200 feet
D. Half of a football field, about 150 feet

14.When steering to avoid a crash while pulling doubles, remember to:

A. Keep both hands on the steering wheel
B. Stay off the brake while turning
C. Be prepared to counter-steer
D. All of the above

15.A drive-wheel skid when pulling doubles could result in a jackknife when:

A. The tractor brakes lock up
B. The trailer pushes the towed vehicle sideways
C. The trailer slides off the right side of the road
D. The tractor spins around


Correct answers (Prawidlowe odpowiedzi):

1. B
2. A
3. B
4. D
5. C
6. C
7. A
8. B
9. B
10. B
11. D
12. C
13. A
14. D
15. B

All tests are provided for informational and hypothetical purposes only. shall not be liable for any errors in the content.

Wszystkie testy zawarte na stronach maja jedynie charakter przykladowo - informacyjny. Nie jestesmy odpowiedzialni za ewentualne bledy w zawartosci merytorycznej testow.