1. To prevent rollovers, remember to:
A Keep the load centered
B Keep the load as low as possible
C Go slow around turns
D All of the above

2. Large combination vehicles take longer to stop:
A When they are empty
B When they are loaded
C Than bobtail tractors
D It takes the same time whether empty or loaded

3. When traveling under 40 mph, you should follow other vehicles:
A Only during the day
B With a distance of one second for every ten feet of your vehicle length
C With a distance of one second for every twenty feet of your vehicle length
D As close as possible so others don't cut in

4. The earliest way to notice a trailer skid is:
A By feeling the pull on your steering wheel
B By feeling a jerking in the back of the tractor
C By seeing it in your mirrors
D By hearing the squeal from the tires

5. If you start a trailer skid you should:
A Step on the brakes quickly
B Release the brakes to get traction back
C Use the trailer hand brake
D Slowly apply pressure to the brakes

6. "Offtracking" occurs when you go around a corner and:
A The rear wheels follow a different path than the front wheels
B The rear trailer goes off the road
C The rear wheels follow the front ones in a straight line
D The front of the trailer pulls to the right

7. The trailer hand valve should be used:
A Only at highway speeds
B Only when parking
C Only to test the trailer brakes
D Both B & C above

8. Which one of the following statements about tractor protection valves is NOT true?:
A It keeps air in the tractor in the event the trailer air leaks
B It is controlled by the trailer air supply valve in the cab
C When it closes it allows air to leak from the tractor line
D It will close automatically if air pressure is low

9. The trailer air supply control:
A Is a red, triangular-shaped knob
B Is a yellow, square knob
C Is a red, square knob
D Is a red, eight sided knob

10. Which one of the following is controlled by the foot brake?
A The service air line
B The emergency air line
C The shut off valve
D The hose coupler