15. The best way to stop any skid is to:
a. accelerate.
b. counter-steer.
c. restore traction to the tires.
d. use stab or controlled braking.
16. How can you be sure you supplied air to a second trailer?
a. Go to the rear of the second trailer and open the emergency line shut-off.
b. Open the hand valve with the rig parked and watch for movement.
c. Watch for a drop of 30 psi. on the air gauge for each trailer.
d. Apply the hand valve at 10mph. You should stop in the same distance as a truck with one trailer at 5mph.
17. Which of these is not a good thing to do when driving on slippery roads?
a. Make turns as gently as possible.
b. Use the engine brake or speed retarder.
c. Keep other traffic out of your side space.
d. Use a light touch on the accelerator and brake pedals.
18. Before you can supply air to the air tanks of a second trailer you need to:
a. close the shut-off valves at the rear of both trailers.
b. open the shut-off valves at the rear of both trailers.
c. open the shut-off valves at the rear of the first trailer and close the shut-off valves at the rear of the second trailer.
d. close the shut-off valves at the rear of the first trailer and open the shut-off valves at the rear of the second trailer.
19. When does the Driver Manual say you should disable the steering axle brakes?
a. Never.
b. When the road is slippery.
c. When driving in very hilly areas.
d. When all of the trailers have brakes.
20. What is likely to happen if the pintle hook is unlocked with the dolly still under the second trailer?
a. The trailer brakes will unlock.
b. The air lines will rupture.
c. The dolly tow bar may fly up.
d. Nothing will happen unless the rig rolls forward.
21. Converter dollies:
a. often do not have spring brakes.
b. have little braking power because they are small.
c. usually need a glad hand converter.
d. All of the above.
Answers: (15)c (16)a (17)b (18)c (19)a (20)c (21)c
Pages 
