CDL- General Knowledge- Set 4

Which of these can cause the vehicle to skid? 1) Not enough weight on the front axle. 2) Over acceleration. 3) Turning too sharply. 4) All of these answers are correct.

Not enough weight on the front axle. Over acceleration. Turning too sharply.

To avoid rollbacks when you start, you should: 1) Stop on a flat surface. 2) Engage the clutch very quickly. 3) Partly engage the clutch before you take your right foot off the brake.

Partly engage the clutch before you take your right foot off the brake.

How do you test the hydraulic brakes for leak? 1) Pump the brake pedal three times, then apply firm pressure to the pedal and hold for five seconds. The pedal should not move. 2) Drive 20 mph and slam on the brakes. 3) Drive slowly and pump the brake pedal. Make sure it doesn't hit the floor.

Pump the brake pedal three times, then apply firm pressure to the pedal and hold for five seconds. The pedal should not move.

What is an "escape ramp" ? 1) Ramps that are located a few miles from the top of a downgrade to help you stop. 2) A quick way to get out of town. 3) Ramps to get on and off an interstate highway fast.

Ramps that are located a few miles from the top of a downgrade to help you stop.

The oil pressure gauge should come up to normal within how long after staring the engine? 1) Minutes. 2) Seconds. 3) It does not matter.

Seconds.

How can you avoid wet brake problems? 1) Speed up, shift to a higher gear. 2) Slow down, shift to a low gear, gently put on the brakes. 3) Apply the brakes harder and faster.

Slow down, shift to a low gear, gently put on the brakes.

You should check the following for looseness, sticking, damage, or improper settings: 1) Steering wheel and Transmission controls. 2) Accelerator, brakes, and clutch pedals. 3) Both of these answers are correct.

Steering wheel and Transmission controls. Accelerator, brakes, and clutch pedals.

If the vehicle in front of you is smaller than yours, it can probably: 1) Out-run you. 2) Stop faster than you. 3) Take turns faster than you.

Stop faster than you.

What is the most important hand signal you and your backing helper should agree on? 1) Stop. 2) Go 3) Slowly.

Stop.

For an average commercial vehicle being driven at 55 mph on dry pavement it will take about_________ to bring the vehicle to a stop. 1) The length of a football field (300 feet). 2) Half the length of a football field (150 feet). 3) Twice the length of the vehicle.

The length of a football field (300 feet).

When backing, why is it important to use a helper? 1) It makes people think you are a better driver. 2) There are blind spots you can't see. 3) It's more fun when you have help.

There are blind spots you can't see.

What factors determine your selection of "safe" speed when going down a long steep downgrade? 1) Size of vehicle, traffic conditions, curves in the road. 2) Condition of the brakes, radio bulletins, and alertness of the driver. 3) Total weight of the vehicle, length of the grade, steepness, road conditions, and weather.

Total weight of the vehicle, length of the grade, steepness, road conditions, and weather.

What are two main things to look for ahead? 1) Road signs and traffic. 2) Police and weigh stations. 3) Traffic and road conditions.

Traffic and road conditions.

If you swing wide to the left before turning right another driver may try to pass you on your right. 1) True 2) False

True

When preparing to do a pre-trip inspection you must check to see that the parking brakes are on and/or chocked. 1) True 2) False

True

Stopping isn't always the safest thing to do in an emergency. 1) True. 2) False.

True.

What are some things to do at an accident scene to prevent another accident? 1) Try to get your vehicle to the side of the road. 2) If you're stopping to help, park away from the accident. 3) Put on your flashers and set out reflective triangles. 4) All of these answers are correct.

Try to get your vehicle to the side of the road. If you're stopping to help, park away from the accident. Put on your flashers and set out reflective triangles

Which of these statements about certain types of cargo is true? 1) Oversize loads can be hauled without special permits during daylight hours. 2) When liquids are hauled, the tank should always be loaded completely full. 3) Unstable loads such as hanging meat or livestock require extra caution on curves.

Unstable loads such as hanging meat or livestock require extra caution on curves.

What are two ways to know when to shift? 1) Use engine speed (rpm) and road signs. 2) Use your watch and engine sounds. 3) Use engine speed (rpm) and use road speed (mph).

Use engine speed (rpm) and use road speed (mph).

When should you downshift automatic transmissions? 1) When going down grades. 2) When going up grades. 3)When going around curves.

When going down grades.

What is hydroplaning? 1) Driving in the snow. 2) When the tires lose their contact with the road. 3) When you hit a pot hole.

When the tires lose their contact with the road.

What are some advantages of going right instead of left around an obstacle? 1) You can avoid a head-on collision. 2) Taking the shoulder may be best. 3) Someone be passing to the left. 4) All of these answers are correct.

You can avoid a head-on collision. Taking the shoulder may be best. Someone be passing to the left.

If you are driving a 30 foot vehicle at 55 mph, how many seconds of following distance should you allow? 1) 4 seconds. 2) 6 seconds. 3) 8 seconds.

4 seconds.

You should use low beams whenever you can. 1) True 2) False

False

Why make emergency plans when you see a hazard? 1) To have something to do while driving. 2) In order to protect yourself and others. 3) To avoid getting a ticket.

In order to protect yourself and others.

What does " communicating" in mean in safe driving? 1) Letting other drivers know you're there to help prevent crashes. 2) Using hand signals. 3) Driving brightly colored vehicles.

Letting other drivers know you're there to help prevent crashes.

When checking lights you should: 1) Make sure that the parking brake is set. 2) Turn off the engine and take the key with you. 3) Turn on the headlights and four way flashers. 4) All of these are correct.

Make sure that the parking brake is set. Turn off the engine and take the key with you. Turn on the headlights and four way flashers.

Name two causes of fires: 1) Under-inflated tires and duals that touch. 2) Tight turns and gravel roads. 3) Driver smoking and following too close.

Under-inflated tires and duals that touch.

How far ahead should you look? 1) 5-10 seconds. 2) 12-15 seconds. 3) 15-30 seconds.

12-15 seconds.

How many red reflective triangles should you carry? 1) 1 2) 3 3) 4

3

You are driving a vehicle that could safely be driven at 55 mph on an open road; but traffic is now heavy, moving at 35 mph, although the speed limit is 55. The safest speed for your vehicle in this situation is most likely: 1) 35 mph. 2) 40 mph. 3) 45 mph.

35 mph.

What is black ice? 1) Dirty snow. 2) Rain and snow mixed. 3) A thin layer if ice clear enough that you can see the road underneath it.

A thin layer if ice clear enough that you can see the road underneath it.

What is a hazard? 1) Any road condition or other road user that is a possible danger. 2) A flashing amber light. 3) A small animal.

Any road condition or other road user that is a possible danger.

Every time you park your vehicle and shut the engine off you should: 1) Leave it in gear ( if it has a manual transmission). 2) Apply the parking brake. 3) Turn the steering wheel as far to the left as you can.

Apply the parking brake.

Which of the following statements about backing is true? 1) Backing is always dangerous. 2) You should back and turn towards the driver's side whenever possible. 3) You should use a helper and communicate with hand signals. 4) All of these are true.

Backing is always dangerous. You should back and turn towards the driver's side whenever possible. You should use a helper and communicate with hand signals.

Why should you back towards the driver's side? 1) Backing toward the right side is dangerous. 2) So you can see better. 3) Both answers are correct.

Backing toward the right side is dangerous. So you can see better.

Why should you be in the proper gear before starting down a hill? 1) Because gravity can cause the speed of your vehicle to increase. 2) Because you don't want to shift going down a hill. 3) Because the clutch works better up a hill.

Because gravity can cause the speed of your vehicle to increase.

What are two special occasions where you should downshift? 1) When starting off fast and speed shifting. 2) Before starting down a hill and before entering a curve. 3) Before starting up a hill and when going around a curve.

Before starting down a hill and before entering a curve.

What effects can wet brakes cause? 1) Brakes can be weak or grab. 2) Brakes to work better. 3) Your foot can get tired.

Brakes can be weak or grab.

What is your most valuable way to see the sides and rear? 1) By looking out the window. 2) Checking your mirrors regularly. 3) Getting out and inspect the areas.

Checking your mirrors regularly.

After inspecting mirrors and windshields for crack, dirt, and illegal stickers, or other obstructions to your vision, you should: 1) Look in the mirror to see if you look good. 2) Clean and adjust as necessary. 3) Not to worry any of it.

Clean and adjust as necessary.

Retarders keep you from skidding where the road is slippery. 1) True 2) False

False

Empty trucks have the best braking. 1) True. 2) False.

False.

You can safely remove the radiator cap as long as the engine isn't overheated. 1) True. 2) False.

False.

You should let air out of hot tires so the pressure goes back to normal. 1) True. 2) False.

False.

What is the proper way to hold the steering wheel? 1) Firmly with both hands on opposite sides of the wheel. 2) With your right hand on the wheel. 3) Firmly with one hand at the top of the wheel and the other hand at the bottom of the wheel.

Firmly with both hands on opposite sides of the wheel.

Why put the starter key in your pocket during the pre-trip inspection? 1) So you don't lose it. 2) So no one moves the vehicle. 3) For your safety.

For your safety.

If you go twice as fast your stopping distance will increase by: 1) Two times. 2) Three times. 3) Four times.

Four times.

What should you do before driving if you are sleepy? 1) Drink some coffee. 2) Take some caffeine pills. 3) Get some sleep before you drive.

Get some sleep before you drive.

What should the wheel bearing seals be checked for? 1) Color of paint used on cover. 2) Cleanliness. 3) Hub oil level and no leaks.

Hub oil level and no leaks.