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TEXAS CDL GENERAL KNOWLEDGE QUESTIONS &
ANSWERS 100% CORRECT
1. Merging onto a road is safest if you?
ANS Wait for a large enough gap in traffic to enter the road.
2. What three things add up to total stoping distance for your truck or
bus? ANS Perception distance, reaction distance, effective breaking distance.
3. You are checking your steering and exhaust system during a pre trip
inspection. Which of these problems if found should be fixed before the vehicle is driven? ANS Steering wheel play of more than 10 degrees (2 inches on a 20 inch wheel)
4. How does vehicle weight effect stopping?
ANS Empty trucks take longer to stop than loaded ones, but this is not always the case for buses.
5. When the roads are slippery you should?
ANS Make turns as gently as possible
6. Which of these is NOT a good rule when caring for injuries at an accident
scene? ANS Keep injured persons cool
7. You are driving on a straight level highway at 50mph. There are no vehicles
in front of you, suddenly a tire blows out on your vehicle, what should you do?
ANS Stay off the brakes until the vehicle has slowed down.
8. After starting the engine
ANS The coolant temperature gauge should begin a gradual rise to normal.
9. You are driving a heavy vehicle with a Manuel transmission, you have to
stop the vehicle on the shoulder while driving on an uphill grade. Which of these is a good rule to follow when putting the vehicle back in motion up the grade? ANS Use the parking brake to hold the vehicle until the clutch engages.
10. Which of these statements is true about speed management?
ANS When the road is slippery it will take longer to stop and it will be harder to turn without skidding.
11. Where must you keep shipping papers when transporting hazardous
materials? ANS In the pouch on the drivers door or in the seat.
12. You should use your mirrors to check?
ANS Where the rear of the vehicle is while you are making turns.
13. Extra care is needed to keep your vehicle centered in your lane because
commercial vehicles... ANS Are often wider than other vehicles.
14. Which of these would probably not help if your windshield were covered in
ice? ANS Brush
ANS Prescrip- tion drugs are allowed if the drug will not affect safe driving ability.
25. You are driving a new truck with a Manuel transmission, what gear will
you probably have to use to take a long steep down grade hill? ANS A lower gear than you would use to climb the hill.
26. Which of these statements about certain type of cargo is true?
ANS Unstable loads such as having meat or livestock
27. Which of these statements about marking a stopped vehicle is true?
ANS If a hill or curve keeps drivers behind you from seeing the vehicle within 500 feet the reflective triangles should be moved back to give adequate warning.
28. Which of these is true about rear wheel braking skids?
ANS On vehicles with trailers, the trailers can push the towing vehicle sideways.
29. Which of these statements about double clutching and shifting is true.
ANS -
You can use the tachometer to tell you when to shift.
30. Which of these is true about overhead clearance?
ANS The weight of the cargo can change the height of the vehicle.
31. How far should a driver look ahead of the vehicle while driving.
ANS 12-15 seconds or 1/4 of a mile
32. If you need to leave the road due to traffic a traffic emergency you
should? ANS Avoid braking until your speed has dropped to about 20mph
33. Which of these statements about backing a heavy vehicle is NOT true?-
ANS Because you can't see behind you, you should back slowly until you bump onto the dock.
34. Which of these lights can not be checked at the same time. E
ANS The signals, break lights, and 4 way flashers.
35. Which of these is correct about emergency or evasive action?
ANS In order to turn quickly you must have a firm grip on the steering wheel.
36. You are driving a vehicle that can safely be driven at 55mph on an open
road, but traffic is now heavy moving at 35 mph though the speed limit is 55mph. The safest speed for your vehicle is? ANS 35 mph
37. According to the cdl drivers manual, why should you limit the use of your
horn? ANS It can startle other drivers.
38. Which of these statements are true about bad weather and driving condi-
tions. ANS When the temperature drops the bridges will freeze before the road does.
46. Which of these systems should receive extra attention during a winter
weather inspection. ANS Exhaust
47. The total weight of a powered unit, the trailer and the cargo is called?
ANS -
Gross combination weight
48. Which of the following statements are true.
ANS Most heavy vehicle accident's occur between midnight and 6am.
49. Controlled breaking
is used to keep a vehicle in a straight line when breaking. ANS is used to keep a vehicle in a straight line when breaking.
50. When a coolant container is part of a pressurized system which of these is
true. ANS You can check the coolant level of a hot engine.
51. Which of these is a good thing to do when driving at night?
ANS Keep your speed slow enough that you can stop within the distance of your headlights.
52. You should avoid driving thru deep puddles to flowing water but if you
must which of these steps can help keep your breaks working? ANS Gently putting on the break while driving through the water.
53. Stab braking should not be used on vehicles with
ANS Anti lock brakes
54. Implied consent means
ANS You have given your consent to be tested for alcohol in your blood.
55. Which of these should be tested while the vehicle is stopped.
ANS Hydraulic breaks
56. If you have to make a vehicle inspection report you must sign it.
ANS When any defects are noted whether they are certified to be repaired or not.
57. Which of the following is not a characteristic of front tire failure?
ANS Vehicle fishtail
58. What is the proper way to hold a steering wheel
ANS With both hands, on opposite sides of the wheel.
59. What is counter steering?
ANS Turning the wheel back in the other direction after steering to avoid emergency traffic.
60. The distance that you should look ahead of your vehicle while driving
amounts to about...mile at highway speeds. ANS 1/4 mile
61. Why will your vehicles speed naturally increase on down grades?
ANS Gravity
62. Which of these pieces of emergency equipment must always be carried in
your vehicle? ANS Warning devices for parked vehicles.
71. Containerized loads
ANS Are generally used when freight is carried part way by rail, ship, or air.
72. In your mirror you can see a car approaching from the rear, the next time
you check your mirror you do not see the car, you wish to change lanes, you should? ANS Wait to change lanes until you are sure the car isn't in your blind spot.
73. Whenever you double your speed your vehicle has about...times more
destructive power. ANS 4
74. You are starting your vehicle in motion from a stop, as you apply power
to the drive wheels they start to spin, you should? ANS Take your foot off the accelerator
75. Placards must be
ANS Placed on all four sides of the vehicle
76. A car cuts in front of you creating a hazard. What should you not do?
ANS -
Honk and stay close behind the car
77. What should you do if you are unsure whether you have enough overhead
clearance? ANS Find another route that will not require driving under the object.
78. You are driving a heavy vehicle you must exit a highway using a off ramp
that curves downhill, you should? ANS Slow down to a safe speed before the curb.
79. You are driving a vehicle at 55 mph on dry pavement about how much
total stopping distance will you need to bring the vehicle to a stop? ANS The length of a football field
80. Which of these is not part of the pre trip inspection in the engine com-
partment? ANS Valve clearance
81. Truck escape ramps
ANS Help avoid damage to vehicles.
82. On which fires can you use water on?
ANS Tires
83. What is the term for a commercial vehicle habit of swinging wide on wide
turns. ANS Off tracking
84. Backing a commercial vehicle...
ANS Is always dangerous
85. Convex (curved or spot) mirrors...
ANS Show a wider are than flat mirrors show.
86. Your breaks can get wet when you drive through heavy rain what can
cause this when breaks are applied?
95. How often should you check your mirrors for a lane change?
ANS Before you change lanes, after you have signaled, after you start the lane change, and after you complete the lane change.
96. What does communicating mean in safe driving?
ANS Tapping your horn when passing, flashing your lights, signaling, or using triangles.
97. Freeway exits can be dangerous for heavy vehicles. At what speed should
you enter the exit? ANS At least 5 miles below the posted speed limit.
98. When driving in heavy traffic you should travel?
ANS At a speed consistent with the flow of other traffic.
99. The best drivers are those who watch for and prepare for hazards, this is
called being... ANS Defensive
100. If you are not sure what extinguisher to use on hazardous material fire
you should? ANS You should wait for qualified fire fighters
