GENERAL KNOWLEDGE CDL TEST DISTRICT OF COLUMBIA - PRACTICE TEST

11. When the spring brakes are on, you should:
not push the brake pedal down.
pump the brakes.
exceed the posted speed limit.
press the accelerator.
12. You should use your horn to:
to let others know you are about to increase your speed.
to let others know you are an experienced driver.
to let others know you are there.
to let others know you are about to break.
13. ABS helps you:
increase your normal braking capability.
avoid wheel lock up and maintain control of your vehicle when you brake.
stop much faster.
steer gently and smoothly while you are braking.
14. When driving a 60-foot truck at 50 mph, your minimum following distance should be:
5 seconds
3 seconds
7 seconds
6 seconds
15. What three things add up to total stopping distance?
Braking distance + stopping distance
Reaction distance + braking distance
Reaction distance + viewing distance + braking distance
Perception distance, reaction distance and braking distance
16. _____ is a thin layer of ice that forms on road surfaces.
Black ice
Blue ice
Grey ice
White ice
17. Vehicle inspections:
are required by state and federal law.
are required once a month.
should only be performed by a certified mechanic.
are not required for trips under 50 miles.
18. Escape ramps:
have been built to stop runaway vehicles on steep downgrades.
can only be used by trucks or passenger vehicles.
are used to safely leave the highway.
All of the above.
19. Empty trucks:
require a shorter stopping distance than full trucks.
require the same stopping distance than full trucks.
require a greater stopping distance than full trucks.
None of the above.
20. A bridge formula permits less maximum axle weight for axles that:
are further apart than normal
have poor weight balance
have a high center of gravity
are closer together
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