CDL Permit Quiz

General Knowledge 4 CDL Test Nebraska
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1. Antilock braking system use sensors and computers to sense:
  • Potential wheel lock up.

  • Brake wear and condition.

  • Roadway surface conditions.

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2. Which of these is true about the use of a heater?
  • You must have at least one extra heater, such as a mirror heater, battery box heater, or fuel tank heater, when driving in temperatures below freezing.

  • If you feel sleepy, warming your cab with the heater will help you stay alert.

  • When driving in winter weather, you should check that the heater is working properly before starting your trip.

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3. Which of these statements about certain types of cargo is true?
  • Unstable loads such as hanging meat or livestock can require extra caution on curves.

  • Oversize loads can be hauled without a special permits during times when the roads are not busy.

  • When liquids are hauled, the tank should always be loaded totally full.

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4. What should you do before driving in mountains?
  • Know escape ramps locations on your way.

  • Unhook your steering axle brake.

  • Carry the tire chains in your vehicle.

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5. What keeps an engine cool in a hot weather driving?
  • Enough engine oil level.

  • Air conditioner use.

  • High speed driving in order to put more air to the radiator.

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6. Can federal inspectors inspect your truck or bus?
  • Yes, but they cannot put it out of service.

  • Yes, and they can put it out of service if it is unsafe.

  • No.

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7. The engine braking effect is greatest when the engine is _______ governed RPM and the transmission is in the _______ gear.
  • below, higher

  • near, lower

  • above, lower

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8. Which of these is NOT a good rule to follow when caring for an injured person at an accident scene?
  • If a qualified person is helping them, stay out of the way unless asked to assist.

  • Keep an injured persons cool.

  • Move severely injured persons if there is danger due to fire or passing traffic.

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9. The amount of the brake pressure you need to stop the behicle will depend on:
  • Whether the vehicle is equipped with antilock brakes.

  • The vehicle's speed and how quickly you want to stop.

  • The type of brakes the vehicle has.

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10. Communication means:
  • Talking with law enforcement officers.

  • Communicating your intention to other motorists.

  • Talking on the CB radio.

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11. brakes fail while going down a hill?
  • Get off the road as soon as possible.

  • Try to use your parking brakes to stop.

  • Call or radio for help.

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12. Which of these statements about speed management is true?
  • Shady parts of the road allow better traction then do open areas.

  • Road surfaces will freeze before bridges.

  • When the road is slippery, it will take longer to stop and it will be harder to turn without skidding.

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13. Backing of the commercial vehicle is:
  • Always dangerous.

  • Not dangerous if you don't have to turn.

  • Not dangerous if you have a helper.

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14. Which of these statements about cold-weather driving is true?
  • An engine cannot overheat when the weather is very cold.

  • Windshield washer antifreeze should be used.

  • Exhaust system leaks are less dangerous in cold weather.

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15. Controlled braking:
  • Involves locking the wheels for short periods of time.

  • Is used to keep a vehicle in a straight line when braking.

  • Should only be used with hydraulic brakes.

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16. Brake fade:
  • Can be caused by the brakes getting very hot.

  • Can be corrected by letting up on the brakes for 1-2 seconds and then reapplying them.

  • Can be caused by very cold weather.

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17. The center of gravity of a load:
  • Should be kept as high as possible.

  • Can make a vehicle more likely to tip over on curves if it is high.

  • Is only a problem if the vehicle is overloaded.

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18. Your brake can get wet when you are driving through the heavy rain. What can happen if the brakes are applied?
  • Hydroplaning.

  • Extensive brake wear.

  • Trailer jackknife.

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19. Most skids:
  • Happen on ice.

  • Will not happen with radial tires.

  • Are caused by going too fast or trying to stop too quickly.

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20. Which of these is true about radiator shutters and the winterfront during the winter driving?
  • The winterfront should be closed tightly.

  • Ice should be removed from the radiator shutter.

  • The engine may overheat if winterfront left open.

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21. A hazard:
  • Is any road condition or other road user that is possible danger.

  • Cannot turn into emergency.

  • Does not need to be seen.

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22. You are driving a heavy vehicle with a manual 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 it back in motion up the grade?
  • Keep the clutch slipping while slowly accelerating.

  • Use the parking brake to hold the vehicle until the clutch engages.

  • Let the vehicle roll backwards a few feet Cbefore you engage the clutch, but turn the wheel so that the back moves away from the roadway.

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23. The speed at which you drive should be determined by:
  • Your schedule.

  • Your engine type.

  • Your visibility.

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24. You will know if the vehicle you are driving is equipped with ABS brakes by:
  • Red indicator lamps on the brake cylinders.

  • The certification on the driver-side door.

  • When you turn on the ignition, yellow ABS malfunction lamps light up on the instrument panel.

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25. You are starting your vehicle in motion from a stop. As you apply power to the drive wheels, they start to spin. You should:
  • Take your foot off the accelerator.

  • Take your foot off the accelerator and apply the brakes.

  • Try a lower gear.

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26. When starting a bus on a level surface with good traction there is often no need for:
  • A tire check.

  • The packing brake.

  • Slow acceleration.

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27. Which of these best describes how you should use the brake pedal on a steep downhill grade?
  • Light, pumping action.

  • Light, steady pressure.

  • Repeated strong pressure then release.

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28. Which of these is true about notifying the authorities after an accident occurs?
  • An exact location is not necessary, just identify the road and the vehicles involved.

  • You should notify authorities about an accident before doing anything else.

  • If you have a cellular phone or CB radio, you should notify the authorities before exiting your vehicle.

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29. If antilock braking system is not working, you should:
  • Drive normally, but get system serviced soon.

  • Drive at a lower speed and get thesystem serviced soon.

  • Not drive until it is repaired.

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30. Which of these statements about marking a stopped vehicle is true?
  • If a hill or curve keeps drivers behind you from seeing the vehicle within 500 feet, the rear reflective triangle should be moved down the road to give adequate warning.

  • You do not need to put out reflective triangles unless the vehicle will be stopped for 30 minutes or more.

  • The vehicle's taillights should be kept on to warn other drivers.

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31. In your mirror you see a car approaching from the rear. The next time you check your mirror, you do not see the car. You wish to change the lane. You should:
  • Wait to change lanes until you are sure that car isn't in your blind spot.

  • Ease into the other lane very slowly so the car can get out of the way if it is beside you.

  • Assume that car left the road and change lane as normal.

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32. Which of these would probably NOT help if windshield covered with ice?
  • Brush.

  • Scraper.

  • Defroster.

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33. In mounting driving you will have to use a lower gears to drive safely on a grade. Which of these does NOT affect your choice of gear?
  • Weight of the load.

  • Tire tread type.

  • Length of the grade.

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34. Which of these statements about hazard of vehicle fire is true?
  • Poor trailer ventilation can cause cargo to catch on fire.

  • Carrying a properly charged fire extinguisher will help prevent fires.

  • Under-inflated tires will not cause a vehicle fire.

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35. The best drivers are those who watch and prepare for hazard. This is called the ____________ driving.
  • offensive

  • defensive

  • objective

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36. The driver's manual suggests several things to do, when you pass a vehicle. Which of these in NOT one of them?
  • Lightly tap your horn.

  • At night, turn on your high beams before you start to pass and leave them on until you have completely passed the vehicle.

  • Assume that the other driver does not see you.

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37. Optional safety equipment may include emergency phone number, tire chains, and:
  • Tire changing equipment.

  • Red reflective triangles.

  • Charged fire extinguisher

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38. If you have convicted of driving a commercial vehicle under influence of alcohol or drugs, you will lose your CDL for at least _______.
  • 6 months

  • 1 year

  • 2 years

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39. The primary cause of fatal crashes is:
  • Driving at night.

  • Driving while eating.

  • Driving too fast.

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40. You should adjust and check each mirror to show:
  • Some part of the vehicle is showing.

  • You can see your entire vehicle.

  • You do not have a blind spot.

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41. You are driving a 40-foot vehicle at 35 mph. The road is dry and visibility is good. What is the least amount of space that you should keep in front of your vehicle to be safe?
  • 3 seconds.

  • 4 seconds.

  • 5 seconds.

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42. If a tractor, truck or bus has antilock brakes and the yellow ABS malfunction lamp lights up on the instrument panel when you areunderway:
  • Your vehicle's ABS may not be functioning.

  • The roadway may be slick.

  • Your brake fluid may be low.

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43. You are driving a vehicle that could safely be driven at 55 mph on an open road. However, traffic is heavy and other vehicle driving at 35 mph, although the speed limit is 55 mph. The safest speed for your vehicle is more likely to be:
  • 35 mph.

  • 45 mph.

  • 55 mph.

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44. How much space in front of you is needed while driving on a highway?
  • 1 second for each 10 feet of vehicle length.

  • 1 second for each 20 feet of vehicle length.

  • 1 second for each 30 feet of vehicle length.

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45. Which of these is a good thing to remember about drinking alcohol?
  • The driver can control how fast the body gets rid of alcohol.

  • Small quantities of alcohol improve reaction time.

  • Alcohol first affect judgment and self-control, which are necessary for safe driving.

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46. Which of the following statements about speed management is true?
  • If you double your speed, stopping distance will double.

  • Empty truck and loaded trucks will have the same stopping distance.

  • If you double your speed, stopping distance will be increased by 4 times.

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47. The road you are driving on becomes very slippery due to the glare i ice. Which of these is a good thing to do in such a situation?
  • Stop driving as soon as you can safely do so.

  • Downshift to stop.

  • Keep varying your speed by accelerating and braking.

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48. You should lightly apply your brakes to flash the brake lights if:
  • You are about to exit the road and need to slow down.

  • A police car is approaching you from the Bother direction.

  • A driver tailgates your vehicle.

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49. Which of these statements about backing a heavy vehicle is true?
  • You should avoid backing whenever you can.

  • Helpers should be out of the driver's sight and they should use only voice (spoken) signals to communicate with the driver.

  • It is safer to back toward the right side of the vehicle than toward the driver's side.

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50. In a mountain driving you should go slow for safety. Which of these is the most important?
  • Weight of the vehicle.

  • Tire tread type.

  • Depth of the tread.

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