1. 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

2. 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

3. 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

4. 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

5. 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

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. 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

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. 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

11. 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

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. 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

15. 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

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