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Class B Knowledge test > Test 2 > Flashcards

Test 2 Flashcards

1
Q

CDL medical certificates must be renewed every

A

Two years

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2
Q

Merging onto a road is safest if you

A

Wait for a large enough gap in traffic to enter the road

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3
Q

What three things add up to the total stopping distance for your truck or bus?

A

Perception distance, reaction distance, braking distance

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4
Q

You are checking your steering and exhaust systems in a pre-trip inspection. Which of these problems, if found, should be fixed before the vehicle is driven

A

Steering wheel play of more than 10 degrees ( 2 inches on a 20 inch steering wheel)

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5
Q

How does vehicle weight affect stopping?

A

Empty trucks can take longer to stop than if loaded, but this is not normally the case for buses

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6
Q

When the roads are slippery, you should

A

Make turns carefully as possible

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7
Q

Which of these is NOT a good rule to follow when caring for injured at an accident scene?

A

Keep injured persons cool

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8
Q

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 first?

A

Stay off the brake until the vehicle has slowed down

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9
Q

After starting the engine

A

The coolant temperature gauge should begin in a gradual rise to normal

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10
Q

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?

A

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

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11
Q

Which of these statements about speed management are true?

A

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

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12
Q

Where must you keep shipping papers when transporting hazardous materials?

A

In a pouch on the driver’s door or on the seat

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13
Q

You should use your mirrors to check

A

Where the rear of your vehicle is while you make turns

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14
Q

Extra care is needed to keep your vehicle centered in your lane because commercial vehicles

A

Are often wider than other vehicles

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15
Q

Why is a broken exhaust system dangerous?

A

Poison fumes could enter the cab or sleeper berth

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16
Q

Which of these statements about causes of vehicle fires is true?

A

Poor trailer ventilation can cause flammable cargo to catch on fire

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17
Q

The purpose of retarders is to

A

Help slow the vehicle driving and reduce brake wear

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18
Q

Which of these is especially true about your tires in hot weather?

A

You should check tire mounting and air pressure before driving

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19
Q

Which of these is usually true about driving in tunnels?

A

There may be strong winds when exiting

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20
Q

When driving through work zones, you should

A

Watch for sharp pavement drop-offs

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21
Q

When you are passing another vehicle, pedestrian or bicyclist, you should assume that they

A

May move into your traffic lane

22
Q

If you’re not sure what to use to put out a hazardous materials fire, you should

A

Wait for qualified firefighters

23
Q

What should you do when your vehicle hydroplanes?

A

Release the accelerator

24
Q

Which of these is true reagrding the use of drugs while driving?

A

Prescription drugs are allowed if a doctor says the drugs will not affect safe driving ability

25
Q

Which of these statements about brakes is true?

A

The heavier a vehicle or the faster it is moving, the more heat the brakes have to absorb to stop it

26
Q

You are driving a new truck with a manual transmission. What gear will you probably have to use to take a long, steel downhill grade?

A

A lower gear than you would use to climb the hill

27
Q

Which of these statements about certain types of cargo is true?

A

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

28
Q

Which of these statements about marketing a stopped vehicle is true?

A

If a hill or curve keeps drivers behind you from seeing the vehicle within 500 feet, the rear reflective triangle should be moved back beyond any hill or curve to give adequate warning

29
Q

Which of these is true about rear drive wheel braking skids?

A

On vehicles with trailers, the trailer can push the towing vehicle sideways

30
Q

which of these statements about double clutching and shifting is true?

A

You can use the tachometer to tell you when to shift

31
Q

Which of these is true about your overhead clearance?

A

The weight of a cargo can change the height of your vehicle

32
Q

How far should a driver look ahead of the vehicle while driving?

A

12-15 seconds

33
Q

If you need to leave the road in a traffic emergency, you shold

A

Avoid braking until your speed has dropped to about 20 mph

34
Q

Which of these statements about backing a heavy vehicle is not true?

A

Because you can’t see, you should back slowly until you slightly bump into the dock

35
Q

which of these lights cannot be checked at the same time?

A

Turn signals, Brake lights, and four-way flashers

36
Q

Which of these is correct about emergency or evasive action?

A

In order to turn quickly, you must have a firm grip on the steering wheel

37
Q

You are driving a vehicle that should safely be driven at 55 mph on an open road. But traffic is now heavy, moving at 35 mph through the speed limit is 55. The safest speed for your vehicle is most likely

A

35 mph

38
Q

According to the commercial driver supplement, why should you limit the use of your horn?

A

It can startle other drivers

39
Q

Which of these is true about bad weather and driving conditions?

A

When the temperature drops, bridges will freeze before roads will

40
Q

To determine blood alcohol concentration (BAC) for person, it is necessary to know

A

How much the person weighs

41
Q

Which of these happens when a tire blows out at highway speed?

A

A vibrating feeling

42
Q

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?

A

4 seconds

43
Q

Truck escape ramps

A

Help avoid damage to vehicles

44
Q

When hydraulic brakes fail while driving, the system won’t build up pressure and the brake pedal will feel spongy or go to the floor. What action should you take?

A

Pump the brake pedal to generate power

45
Q

Which of these statements is NOT checked in the pre-tip inspection?

A

Amount of fuel in the vehicle

46
Q

Which of these statements should receive extra attention during a winter weather inspection?

A

Exhaust

47
Q

The total weight of a powered unit, the trailer, and the cargo is called

A

Gross Combination weight

48
Q

You are driving a long vehicle that makes wide turns. You want to turn left from one street into another. Both are two-lane, two-way streets. You should

A

Begin turning your vehicle when you are halfway through the intersection

49
Q

Which statement is true?

A

Many heavy vehicle accidents occur between midnight and 6 a.m

50
Q

Controlled braking

A

Is used to keep a vehicle ina straight line when braking

Class B Knowledge test (4 decks)

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