GENERAL KNOWLEDGE CDL TEST DISTRICT OF COLUMBIA - PRACTICE TEST

31. If you are involved in a collision and not seriously hurt, you should:
do your best to care for the injured.
notify the authorities.
protect the area.
All of the above.
32. If you must stop on or by a one-way or divided highway, you must place warning devices ___ feet, ___ feet, and ___ feet toward the approaching traffic.
20; 200; 400
10; 100; 200
5; 50; 100
15; 150; 300
33. Most heavy duty vehicles use ___ air brake systems for safety.
triple
dual
single
reduced
34. Checking the engine compartment during the seven-step inspection does NOT include checking:
the battery fluid level.
the engine oil level.
the power steering fluid level.
the engine oil temperature.
35. You should NOT use the parking brakes if:
the brakes are very hot.
the brakes are cold.
the brakes are too dry.
All of the above.
36. The posted speed limit for a curve:
is optional and may be exceeded.
may be too fast for many trucks or buses.
is safe for trucks or buses, but it may be too fast for cars.
is safe for all vehicles.
37. When changing lanes, you should:
ensure that the vehicle behind you has moved into your blind spot.
do it slowly, so a driver you did not see may have a chance to honk their horn.
do it quickly so other vehicles won't get into the lane.
turn sharply.
38. When driving in very hot weather you should inspect your tires regularly. Why?
The minimum tread depth may vary.
Air pressure increases with temperature.
Hydroplaning is more likely if tire pressure is low.
All of the above.
39. Antifreeze:
helps the engine under hot conditions as well as cold conditions.
helps the engine only when the temperature is below freezing.
helps the engine only under hot conditions.
doesn't help the engine in any way.
40. In ideal conditions, if you are driving at 55 mph your vehicle will travel a minimum of _______ until you can bring it to a complete stop.
250 feet
209 feet
At least 350 feet
419 feet
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