NH CDL PRACTICE TEST - GENERAL KNOWLEDGE

21. Driving at night is _______ driving during the day.
safer than
about the same as
more dangerous than
None of the above.
22. To test for hydraulic leaks, you should:
keep the wheels locked up after you release the brakes.
pump the brake pedal three times, then hold the pedal for five seconds. The pedal should not move.
apply the brakes firmly using the brake pedal and check to see if the brake pedal returns to its normal position.
use the stab braking method, then re-apply the brakes as soon as you can.
23. Black ice is:
ice that makes the road look dry.
a thick layer of ice.
a thin layer of black ice.
None of the above.
24. When a tire fails, do NOT:
brake, unless you're about to run into something.
keep a firm grip on the steering wheel.
stay off the brake until the vehicle has slowed down.
None of the above.
25. If you go twice as fast, your stopping distance will increase by:
two times.
eight times.
ten times.
four times.
26. You should check wheel bearing seals for:
gasoline.
leaks.
illegal stickers.
broken leaf springs.
27. When you drive a tractor-trailer combination with ABS, you should:
always apply the brakes hard.
brake as you always have.
pump the brakes.
apply the trailer hand brake whe braking.
28. To use the controlled braking method in an emergency, you should:
pump the brake pedal 3 times.
apply the brakes as hard as you can without locking the wheels.
apply the brakes when the wheels lock up.
apply your brakes all the way, and release the brakes when the wheels lock up.
29. Too much weight on the steering axle can cause:
poor traction.
better handling.
hard steering and damage to the steering axle and tires.
None of the above.
30. The Johnson bar is a valve that:
works the trailer brakes.
reduces the braking pressure to a safe level.
is installed in the first tank the air compressor pumps air to.
keeps air from going out if the air compressor develops a leak.
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