CDL Class A test

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  1. What is the most important reason for doing a vehicle inspection before a trip?
    For the safety of yourself and others.
  2. What things should you check during a trip?
    Gauges in vehicle, voltmeter, mirrors, tires and cargo.
  3. What are some of the key steering systems parts?
    Steering shaft, gear box and pitman arm.
  4. What are some suspension system defects?
    1. Broken hangers. 2. Broken or missing leaves in any leaf spring or leaves that have shifted so they might hit another part. 3. Air suspension that is damaged and/or leaking.
  5. Three types of emergency equipment that you should have with you:
    Spare electrical fuses, fire extinguisher and reflective warning triangles.
  6. Which direction should you always try to back towards and why?
    The drivers side, to avoid blind spots and to avoid hitting objects.
  7. Why is it important to have a helper during backups?
    To help with blind spots and to avoid hitting an object.
  8. What is the most important hand signal when working with a helper?
  9. Name two special conditions where downshifting is needed.
    Before downgrades and curves.
  10. True or False: Retarders help you to keep from skidding when the road is slippery.
  11. What are the two ways to know when to shift?
    Engine speed and road speed.
  12. How far should you always look ahead of you on the road?
    12 to 15 seconds.
  13. What are the two main things to look ahead for on the road?
    Traffic and potential hazards.
  14. Name the most important way to see the rear and sides of your vehicle?
    Your Mirrors.
  15. Define what communicating on the road means.
    Signaling your intentions by using your emergency flashers and horn.
  16. How far apart and where should reflectors be placed on a divided highway?
    10ft., 100ft. and 200ft. to the rear.
  17. What are the three things that equate stopping distance?
    Stopping distance, perception distance and breaking distance.
  18. Driving twice as fast increases your stopping distance by how much?
    Four times.
  19. True or False: Empty trucks have a shorter stopping distance.
  20. Define hydroplaning:
    When your tires no longer have traction due to water on the road.
  21. What is black ice?
    A thin layer of ice where the road is visible underneath it, making it appear wet.
  22. How do you calculate following distance?
    Wait until the vehicle ahead of you passes a shadow or landmark and count how many seconds it takes for you to reach the same spot.
  23. If your driving a 30ft. vehicle at 55mph, how many seconds of following distance do you need?
  24. True or False: You should increase your following distance if you are being tailgated.
  25. Define a road hazard.
    A hazard is any road condition or other driver that is a possible danger.
  26. True or False: Making emergency plans before driving helps you have more time to react.
  27. What are some tips to follow so you won't become distracted?
    Turn off cell phone or pre-program phone numbers, not reading and not writing.
  28. When is it safe to use in vehicle technology?
    Pull over and stop to use it.
  29. How do you recognize a distracted driver?
    Drifting in lane, inconsistent speeds, talking and eating while driving.
  30. How do distracted drivers drive?
    In bold, selfish and pushy ways.
  31. Define road rage:
    Driving with intent to do harm to others or physically assaulting driver.
  32. Tips to reduce stress:
    Listening to "easy" music, giving the road your full attention, being realistic with time management by anticipating road delays.
  33. You should use you low beams whenever you can. True or False
  34. What should you do before you drive if you are drowsy?
    Get some sleep
  35. What affects can wet brakes cause?
    Lack of breaking power, lockups and jackknife.
  36. You should let the air out of hot tires so the pressure goes back to normal. True or False
  37. You can safely remove the radiator cap as long as the engine isn't overheated? True or False
  38. What factors determine our selection of a "safe" speed when going down a long, steep downgrade?
    1) Total weight of the load 2) length of grade 3) steepness of grade 4) road conditions 5) weather conditions
  39. Why should you be in the proper gear when starting down a hill?
    Will avoid not being able to downshift or put truck in gear, resulting in loss of engine brake.
  40. What type of vehicles can get stuck on a railroad-highway crossing?
    Low slung vehicles and single axle tractors pulling long trailers with their landing gear set to accommodate tandem axle trailer.
  41. How long does it take for a typical tractor-trailer until to clear a double track?
    15 seconds
  42. Describe the proper braking technique when going down a long, steep downgrade?
    Apply brakes "just hard enough" to feel a definite slowdown. Release the brake as soon as you reach 5mph below the posted speed limit. Reapply the brake as soon as speed reaches posted speed limit and repeat steps one and two.
  43. Stopping is not always the safest thing to do in an emergency. True or False
  44. What are some of the advantages to going right around an obstacle instead of left?
    It prevents forcing traffic into the oncoming lane
  45. What is an escape ramp?
    A ramp made of gravel which may or may not be on an incline.  Designed for emergency brake failure.
  46. If a tire blows out, you should put the brakes on hard to stop quickly. True or False
  47. How do you know if your truck has ABS brakes?
    By noting a malfunction lamp on the instrument panel, which will briefly light up during start up
  48. What is the proper braking technique when driving a vehicle with ABS?
    Brake as you normally would
  49. How do anti-lock brakes help you?
    By preventing lock ups
  50. What are some things to do at the scene of an accident to prevent another accident?
    1) pull over to the side of the road (if involved) 2) park away from the scene if stopping to help 3) put on emergency flashers 4) set out reflective triangles
  51. Name two causes of tire fires.
    1) under inflated tires 2) duals that touch
  52. What kinds of fires is a B:C fire extinguisher NOT good for?
    Fires in combustible metals, ordinary combustibles
  53. When using your extinguisher, should you get as close as possible to the fire?
    No, you should get as close as safely possible.
  54. Name some causes of vehicle fires?
    Electrical short, improper fueling, flammable cargo, driver smoking
  55. Common medicines for colds can make you sleepy. True or False
  56. What should you do if you become sleepy while driving?
    Pull over and take a nap
  57. Coffee and a little fresh air will help a drinker sober up. True or False
  58. What is a hazardous materials placard?
    Signs put on the outside of a vehicle to identify the cargo.
  59. Why are placards used?
    To warn others of hazardous materials
  60. What is "sleep debt"?
    Sleep debt is a debt that can only be paid off by sleeping.
  61. What are the danger signals of drowsy driving?
    1) eyes closing and losing focus by themselves 2) trouble keeping head up 3) can't stop yawning 4) not remembering the last few miles 5) drifting between lanes and jerking the truck back on the road
  62. What four things related to cargo are drivers responsible for?
    1) inspecting cargo 2) knowing your cargo is secured properly and not obscuring view ahead or sides 3) Knowing your cargo doesn't restrict access to emergency equipment.
  63. How often must you stop while on the road to inspect your cargo.
    Every three hours or 150 miles and at every break.
  64. How is Gross Combination weight Rating different from Gross Combination Rate?
    Gross Combination Weight Rating is the manufacturers maximum specified weight for the vehicle plus load.
  65. Name two situations where legal maximum weights may not be safe?
    Bad weather and/or mountains
  66. What can happen if you don't have enough weight on the front axle?
    Underloaded front axles can make the steering axle weight too light to steer properly.
  67. What is the minimum number of tiedowns for any flat bed load?
  68. What is the minimum number of tiedowns for a 20 ft. load?
  69. Name two basic reasons for covering cargo on an open bed?
    To protect load from weather and from spilling
  70. What must you check before transporting a sealed load?
    The weight
  71. Why must air tanks be drained?
    To prevent oil and water buildup, causing freezing in cold weather and brake lockup.
  72. What is a supply pressure gauge used for?
    To tell you how much air is in your tanks.
  73. All vehicles with air brakes must have a low air pressure warning signal. True or False
  74. What are spring brakes?
    Spring brakes are powerful springs held back by air pressure. Used for emergency brakes and parking brakes.
  75. Front wheel brakes are good under all conditions. True or False
  76. How do you know if your vehicle is equipped with ABS?
    By looking under the vehicle for the electronic control unit and wheel speed sensor wires coming from the back brakes.
  77. What is a dual air brake system?
    A dual air brake system is has two separate air brake systems which use a single set of brake controls.
  78. What are slack adjusters?
    A temporary measure to to correct the brake adjustment in an emergency situation.
  79. How can you test the low pressure warning signal?
    1) Shut off engine when you have enough pressure built up so that the low pressure warning won't come on 2) turn on the electrical power and pump brakes to reduce air tank pressure. The low pressure warning signal must come on before the pressure drops to less than 60psi.
  80. How can you test that the spring brakes come on automatically?
    Pump brakes to reduce the tank pressure. The TPV valve and the parking brake valve should pop out. This causes the spring brake to engage.
  81. What are the maximum leakage rates?
    Air leakage rates should be less than 2 psi in one minute for single vehicles and less than 3 psi for combination vehicles.
  82. Why should you be in proper gear before starting down a hill?
    To maintain proper speed and to avoid brake fade and brake failure.
  83. What factors can cause brakes to fade or fail?
    Excessive use of service brakes and a loss of air pressure.
  84. What two things are important to prevent roll over?
    Keep the cargo as close to the ground as possible and drive slowly around turns.
  85. When you turn suddenly while pulling doubles, which trailer is most likely to turn over?
    The last trailer is more likely to turn over
  86. The use of brakes on a long steep downgrade is only a supplement to the braking effect of the engine. True or False
  87. If you are away from your vehicle only a short time, you do not need to use your parking brake. True or False
  88. How often should you drain your air tanks?
    After each day
  89. How do you brake when you drive a tractor-trailer combination with ABS.
    You should drive as you always have.
  90. You still have normal brake functions if your ABS is still not working. True or False
  91. Why should you not use a trailer hand brake to straighten out a jackknifing trailer?
    because the brakes on the trailer wheels caused the skid in the first place.
  92. What is offtracking?
    When the rear wheels follow a different path then the front wheels.
  93. When you back a trailer, you should position your vehicle so you can back in a curve path to the driver's side. True or False
  94. What type of trailers can get stuck on railroad-highway crossings?
    Low slung units and trailers with their landing gear set to accommodate of tandem axle.
  95. Why should you not use the trailer hand valve while driving?
    Because of the danger of making the trailer skid.
  96. Describe what the trailer air supply control does?
    Used to control the tractor protection valve. Push to supply the trailer and pull to shut off air supply and engage the trailer emergency brakes.
  97. Describe what the service line is for?
    For controlling the foot brake or trailer hand brake. Allows brakes to be applied more quickly than otherwise possible.
  98. What is the emergency air line for?
    It supplies air to the trailer air tanks and controls the emergency brakes on combination vehicles.
  99. Why should you use chocks when parking a trailer without spring brakes?
    Because the truck can roll freely if there is a loss of air pressure.
  100. Where are the shut off valves?
    At the back of trailers.
  101. What might happen if the trailer is too high when you try to couple?
    It may not couple correctly.
  102. After coupling, how much space should be between the upper and lower fifth wheel?
  103. You should look into the back of the fifth wheel to see if it is locked into the kingpin? True or False
  104. To drive you need to raise the landing gear only until it just lifts off the pavement. True or False
  105. How do you know if your trailer is equipped with ABS?
    Trailers with ABS will have a yellow ABS malfunction lamps on the left side, either on the front or rear corner.
  106. Which shut off valves should be left open and which should be closed?
    All valves should be CLOSED.
  107. How can you test that air flows to all trailers?
    1) apply emergency brakes 2) wait for pressure to reach normal 3) push the red trailer supply knob 4) use the hand brake to supply the service line 5) go to the rear of the rig 6) open the emergency line shut off valve at the rear of the trailer. You should hear air escaping showing that the entire system is charged. 7) close valve
  108. How can you test the tractor protection valve?
    1) charge the trailer air brake system 2) shut off engine 3) step on and off the brake to reduce pressure in tanks. The trailer supply control will pop out or go in "normal" to "emergency" when air pressure falls below manufacturers specifications.
  109. How can you test the trailer emergency brakes?
    1) charge the trailer air brake system and see that trailer rolls freely 2) stop and pull the trailer air supply control 3) pull gently on trailer with tractor to see if brakes are on. This tells you that the trailer brakes are connected and working.
  110. How can you test the trailer service brakes?
    1) check for normal air pressure, release parking brake 2) move vehicle forward slowly an apply trailer brakes with hand control 3) you should feel the brakes come on. This tells you that the trailer brakes are connected and working.
Card Set:
CDL Class A test
2013-05-14 05:03:33

Preparation for the US DOT CDL test
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