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CDL GENERAL KNOWLEDGE QUESTIONS &
ANSWERS 100% CORRECT
1. If you have an air brake restriction...: you may not operate a CMV
2. What is the most important reason for doing a vehicle inspection?: Safety.
Safety for yourself and other road user.
3. What things should you check during a trip?: Watch gauges for signs of
trouble. Use your senses to check for problems (look,listen,smell,and feel) Check critical items when you stop : tires, wheels, rims, brakes, lights, reflectors, electrical connections to trailers.
4. Name some key steering wheel parts: Gear box
pitman arm steering knuckle steering arm tie rod
5. Name some suspinsion system defects: Broken leaf spring, spring hangers
that allow movement of axle. U-bolts, or other axle poistioning parts that are cracked, or damaged.
6. What 3 kinds of emergency equiptment must you have?: Spare electrical
fuses Three red reflective triangles properly charged and rated fire extinguisher.
7. What is the minimum tread depth for front tires? For all other tires?: 4/
on the front and 2/32 elsewhere
8. Name some things you should check on the front of your vehicle during
the walk around inspection?: Headlights, low and high beam. Windshield wiper arms for proper spring tension. Wiper blades for damage. Reflectors Turn Signals both left and right.
9. What should wheel bearing seals be checked for?: Leaks, Leaks, LEAKS!!
10. How many red reflective triangles should you carry?: Three
11. How do you test hydraulic breaks for leaks?: Pump brake pedal three times
and apply firm pressure to the pedal, hold for five seconds. The pedal should not move.
12. Why put the starter switch key in your pocket during the pre-trip inspec-
tion?: To keep someone from running over you.
13. Why should you back toward the driver's side?: So you can see better
The lower ranges prevent the transmission from shifting up beyond the selected gears ( unless the governor rpm is exceeded )
20. TRUE OR FALSE:
Engine retarders keep you from skidding when the road is slippery: False
21. What are the two ways to know when to shift?: Use engine speed (rpm) or
road speed (mph)
22. TRUE OR FALSE:
All drivers look ahead, but many don't look far enough ahead: true
23. How far ahead does the manual say you should look ahead?: Most good
drivers look at least 12 to 15 seconds ahead
24. What are some things to look for ahead?: Look for vehicles coming onto the
highway, into your lane, or turning. Watch for brake lights from slowing vehicles by seeing these things far enough ahead, you can change your speed, if necessary.
25. Whats the most important way to see the sides and rear of your vehi-
cles?: WATCH YOUR MIRRORS!!
26. By using your mirrors you can see?: Tires and cargos
Loose straps, ropes, or chains
27. TRUE OF FALSE :
Mirrors can only be checked accurately when the trailer is straight.: True
28. TRUE OR FALSE:
There are blind spots that your mirrors cannot show you?: True
29. Some drivers try to help out others by signaling when it is safe to pass.
Should you do this?: No, don't do it. You can be blamed if an accident occurs!
30. What does "communicating" mean in safe driving?: Other drivers can't
know what you are going to do until you tell them. You communicate your intentions by using turn signals for turns and lane changes
39. What is hydroplaning?: The tires loose their contact with the road and have
little or no traction
40. Hydroplaning can occur at speeds as low as mph if their is a lot of
water.: 30
41. What is "Black Ice?": A thin layer that is clear enough that you can see the
road underneath it It makes the road look wet Any time the temp is below freezing and the road looks wet, watch out for black ice!
42. TRUE OR FALSE:
You should alwasy be able to stop within the distance you can see ahead.: - True
43. At night, you can't see as far with low beams, so you should..: Slow down
44. TRUE OR FALSE:
In heavy traffic, the safest speed is that of other vehicles as long as it is legal and not excessive for conditions.: True
45. When driving through a roadway work zone, you should: Decrease your
speed for adverse weather or road conditions. Decrease your speed even further when a worker is close to the roadway.
46. TRUE OR FALSE :
If the vehicle ahead of you is smaller than yours, it can probably stop faster than you can.: True
47. How do you find out how many seconds of follwoing distance space you
have?: Wait until the vehicle ahead passes a pavement marking, or some other clear landmark. Count off the seconds. Compare your count with the rule of one second for every ten feet of length.
48. If you are driving a 40-foot vehicle at 35 mph, how many seconds of
following distance should you allow?: Four seconds
49. If you are driving a 60-foot vehicle at 55 mph, how many seconds of
53. Many drivers forget about the space under their vehicles which can cause
them to..: Get hung up
54. TRUE OR FALSE :
If you swing wide to the left before turning right, another driver may try and pass you on the right.: True
55. TRUE OR FALSE :
Before you start across a road, make sure you can get all the way across before traffic reaches you.: True
56. What is a hazard?: A hazard is any road condition or other road user ( driver,
bicyclist, pedestrian ) that is a possible danger.
57. Why should you make emergency plans when you see a hazard?: Being
prepared will reduce the danger!
58. How can you recognize distracted drivers?: Vehicles that drift over the lane
divider lines, or travel at inconsistant speeds.
59. What are some tips to follow so you wont become a distracted driver?: -
Review and be totally familiar with all safety and usage features on any in-vehicle electronics, including your wireless phone, before you drive. Pre-program radio stations and pre-load all cd's and cassets.
60. What is the definition of agressive driving and road rage?: Agressive driving
is the act of operating a motor vehicle in a selfish, bold, or pushy manner, w/o
regard for the rights or safety of others. An agressive driver may change lanes abruptly and without warning. Road rage is operating a vehicle with the intent of doing harm to others or physically assaulting a driver or their vehicle.
61. What should you do when confronted with an agressive driver?: Make
every attempt to get out of their way. Do not challenge them by speeding up. Avoid eye contact, and ignore gestures and refuse to react with them.
62. What are some things you can do to reduce your stress before and while
you drive?: Listen to "easy listening" music
It is illegal to shift gears while crossing railroad tracks.: True
69. TRUE OR FALSE:
If your brakes fade, set the parking brake to stop the vehicle.: False
70. TRUE OR FALSE:
You should use low beams whenever you can.: False
71. The best advice for driving in fog is...: DON'T!
72. During winter driving you should pay extra attention to the following...: -
Tire chains
Defrosting and heating equiptment.
73. What effects can wet brakes cause? How can you avoid these problems?-
: Can cause loss of braking power, wheel lockups, pulling to one side or the other. Water in the brakes can cause the brakes to be weak, to apply unevenly, or to grab.
74. TRUE OR FALES:
You should let air out of the hot tires so the pressure goes back to normal.- : False
75. In hot weather, inspect tires every...: Every 2 hours or 100 miles
76. When can you safely remove the radiator cap?: When system has cooled.
77. What factors determine your selection of a "safe" speed when going
down a long, steep downgrade.: Total weight of the vehicle and cargo. Legnth of grade, steepness of grade, road conditions, and weather.
78. Why should you be in proper gear before starting down a hill?: You may
not be able to shft into lower gears. You may not even be able to get back into any gear and all engine braking affect will be lost.
79. Descibe the proper braking technique when going down a long, steep
83. If you loose your brakes on a downgrade, you should....: Use the escape
ramp
84. What type of vehicles can get stuck or railroad-highway crossing?: Low
slung units ( lowboy, car carrier, moving van, possum-belly livestock trailer ) Single-axle tractor pulling a long trailer with its landing gear set to accommodate a tandem-axle tractor.
85. How long does it take a typical tractor-trailer unit to clear a double
track?: At least 14 seconds to clear a single track and more than 15 seconds to clear a double track.
86. Why is stopping not always the safest thing to do in an emergency?: You
can almost alwasy turn to miss an obstacle more quickly than you can stop. When you don't have enough room to stop, you may have to steer away from whats ahead.
87. What are some advantages of going right, instead of left around an
obstacle?: If an oncoming driver has drifted into your lane, a move to your right is best. If that driver has realized what has happened, a natural reaction is to move back into their lane.
88. What is an "escape ramp?": A bed of loose, soft material to slow a runaway
vehicle.
Escape ramps are sometimes used in combination with an upgrade.
89. TRUE OR FALSE:
If a tire blows out, you shoould put the brakes on hard and stop quickly.: False
90. The major signs of tire failure are...: Sound. The loud "bang" is an easily
recognized sign. Vibration. The vehicle thumps or vibrates heavily.
91. TRUE OR FALSE:
When leaving the roadway in an emergency, avoid using the brakes until
98. What advantages do you have with ABS?: Brake pressure is adjusted to
provide the maximum braking without the danger of lockup.
99. TRUE OR FALSE:
If you ABS malfunctions, you still have regular brakes.: True
100. TRUE OR FALSE:
The most common skid is where the rear wheels loose traction through excessive braking or acceleration.: True
101. TRUE OR FALSE:
Driving to fast for conditions causes most front-wheel skid.: True
102. TRUE OR FALSE:
The frist thing to do at a crash scene is to keep another crash from happening in the smae spot.: True
103. TRUE OR FALSE :
It takes time, not coffee or a cold shower to sober up.: True
104. What are some things to do at an accident scene to prevent another
accident?: If you are involved in the crash, try and get to the side of the road. If you are stopping to help, park away from the crash.
105. Name two causes of fire tires.: Under-inflated tires
Duals that tocuh.
106. TRUE OR FALSE:
The B:C type fire extinguisher is designed to work on electrical fires and burning liquids.: True
107. TRUE OR FALSE:
When using a fire extinguisher, you should get as close as possible to the fire.: False
108. Name some causes of vehicle fires.: Under-inflated tires and duals that
