MO CDL PRACTICE TEST - GENERAL KNOWLEDGE

21. When driving on wet roads, you should reduce your speed by about:
one-fifth.
one-half.
one-third.
22. After a tire has been changed, the driver should stop a short while later to:
deflate the tire to 10 psi.
check the tightness of the nuts.
decrease tire pressure.
23. Total stopping distance equals:
Braking distance + viewing distance
Perception distance + reaction distance + braking distance
Perception distance + braking distance
24. When driving on a slippery surface, you should do all of the following except:
adjust braking to conditions.
keep a shorter following distance.
not pass slower vehicles unless necessary.
25. A hazard is:
Something you can easily avoid.
A dangerous material.
Any road user or road condition that is a possible danger.
26. When approaching an emergency vehicle stopped on the side of the road with lights flashing, you should:
move to the lane not next to that of the emergency vehicle.
speed up.
stay in the right lane.
27. When you pull off the road and stop, you should:
use the taillights.
turn on the 4-way emergency flashers.
flash your brake lights.
28. If the drive wheels begin to spin, you should:
take your foot off the accelerator.
apply your brakes all the way.
accelerate smoothly and change gears as necessary.
29. If you smell exhaust fumes in the cab, you should:
stop immediately.
open the windows.
remember to conduct a post-trip inspection.
30. While driving at night, use __________ when it is safe and legal to do so.
interior lights
high beams
low beams
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