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CDL PERMIT TEST QUESTIONS & ANSWERS
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1. What is the most important reason for doing a vehicle inspection
ANS To ensure the vehicle is safe to drive and roadworthy.
2. What things should you check during a trip
ANS Tires, brakes, lights, connections to trailer, trailer coupling devices, cargo securement devices(tarps, canvass, or straps)
3. Name some key steering system parts
ANS Steering wheel, steering shaft, gear box, hydraulic fluid reservoir, pitman arm, drag link, steering knuckle, spindle, power steering cylinder, steering arm, tie rod
4. Name some suspension system defects
ANS Missing or broken leaf springs, leaking shock absorbers, broken spring hangers, torque rod (arm, ubolts, spring hangers, or other axle positioning parts) cracked or damaged
5. Name three kinds of emergency equipment you must have
ANS Fire extinguish- er, 3 red triangles, spare fuses, flare
6. What is the minimum tread depth for front tires? For other tires?
ANS 4/32" for front tires, 2/32" for all others
7. Name some things you should check on the front of your vehicle during
the walk around inspection ANS Condition of axle and steering system (grab for looseness), condition of the
windshield (clean/dirty, damaged, wiper arms, wiper blades, and lights & reflectors (amber at front for clearance and reflectors, white or amber for turn signal)
8. What should wheel bearing seals be checked for?
ANS Leaks
9. How many red reflective triangles should you carry?
ANS Three
10. How do you test hydraulic brakes for leaks?
ANS Pump three times, hold brake down for 5 seconds. Brakes should hold, if not there is a problem.
11. Why put the starter switch key in your
pocket during the pre-trip inspection? ANS So no one moves the truck while you are inspecting it.
12. Why should you back toward the driver's
side? ANS It is safer because the driver can see more
13. If stopped on a hill, how can you start
moving without rolling back? ANS Engage parking brake or clutch before removing foot from brake
14. When backing, why is it important to use a
helper? ANS The helper can see more than the driver, including blind spots, safer
23. What does "communicating" mean in safe
driving? ANS Using signals, horn, or lights to warn drivers of hazards or changes in driving such as changing lanes, slowing down, accidents, etc
24. Where should your reflectors be placed
when stopped on a divided highway? ANS Behind the vehicle, 10ft, 100ft, 200ft
25. What three things add up to total stopping
distance? ANS Perception Distance + Reaction Distance + Braking Distance
26. If you go twice as fast, will your stopping
distance increase by two or four times? ANS Four times
27. Empty trucks have the best braking. True
or False? ANS False
28. What is hydroplaning?
ANS When tires loose contact with the road surface due to water on the roadway
29. What is "black ice"?
ANS Thin layer of ice over roadway where you can see the pavement, looks wet
30. How do you find out how many seconds of
following distance space you have? ANS ...
31. If you are driving a 30-foot vehicle at 55
mph, how many seconds of following distance should you allow? ANS ...
32. You should decrease your following
distance if somebody is following you too closely. True or False? ANS ...
33. If you swing wide to the left before turning
right, another driver may try to pass you on the right. True or False? ANS ...
34. What is a hazard?
ANS ...
35. Why make emergency plans when you see a
hazard? ANS ...
36. What are some tips to follow so you won't
become a distracted driver? ANS ...
45. You should let air out of hot tires so the
pressure goes back to normal. True or False? ANS ...
46. You can safely remove the radiator cap as
long as the engine isn't overheated. True or False? ANS ...
47. What factors determine your selection of a
"safe" speed when going down a long, steep downgrade? ANS ...
48. Why should you be in the proper gear
before starting down a hill? ANS ...
49. Describe the proper braking technique
when going down a long, steep downgrade. ANS ...
50. What type of vehicles can get stuck on a
railroad-highway crossing? ANS ...
51. Stopping is not always the safest thing to do
in an emergency. True or False? ANS ...
52. What are some advantages of going right
instead of left around an obstacle? ANS ...
53. What is an "escape ramp?"
ANS ...
54. If a tire blows out, you should put the brakes
on hard to stop quickly. True or False? ANS ...
55. How do you know if your vehicle has antilock brakes?
ANS ...
56. What is the proper braking technique when
driving a vehicle with antilock brakes? ANS ...
57. How do antilock brakes help you?
ANS ...
58. What are some things to do at an accident
scene to prevent another accident? ANS ...
59. Name two causes of tire fires.
ANS ...
60. What kinds of fires is a B
ANSC extinguisher not good for? ANS ...
61. When using your extinguisher, should you
62. Name some causes of vehicle fires.
ANS ...
63. Common medicines for colds can make
you sleepy. True or False? ANS ...
64. Coffee and a little fresh air will help a
drinker sober up. True or False? ANS ...
65. What is a hazardous materials placard?
ANS ...
66. Why are placards used?
ANS ...
