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CDL Answers > General Knowledge > Flashcards

General Knowledge Flashcards

1
Q

1) As blood alcohol concentration (BAC) goes up, what happens?

A

Judgment and self control are affected.

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2
Q

2) Implied consent means:

A

you have given your consent to be tested for alcohol in your blood

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3
Q

3) The total weight of the powered unit, the trailer, and the cargo is called:

A

gross combination weight

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4
Q

4) If you do not have a CB radio, what is the first thing you should do at an accident scene?

A

Protect the area

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5
Q

5) Which of these is true about mirror adjustments?

A

You should adjust your mirrors prior to starting your trip.

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6
Q

6) Brake fade:

A

can be caused by the brakes getting very hot.

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7
Q

7) On which fires can water be used?

A

Tires

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8
Q

8) Which of these statements about engine overheating is true?

A

You should never remove the radiator cap on a pressurized system until it has cooled.

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9
Q

9) Which of these is not a danger of rough acceleration?

A

Tire damage

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10
Q

10) Which of these is true about the use of a heater?

A

When driving in winter weather, you should check that the heater is working properly.

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11
Q

11) What is the proper way to hold the steering wheel?

A

With both hands firmly on opposite sides of the wheel.

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12
Q

12) If you have a heavy load that is slowing you down on an upgrade, you should?

A

Shift into a lower gear.

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13
Q

Which of these is not a danger when an automatic transmission is forced into a low gear at high speed?

A

Loss of steering control

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14
Q

14) If possible, a helper should be used to help back your vehicle:

A

Whenever you have to back.

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15
Q

15) When looking ahead of your vehicle while driving, you should look:

A

Back and forth, near and far

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16
Q

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

A

12-15 seconds

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17
Q

17) Which of these is the proper way to signal to change lanes?

A

Signal early and change lanes early and smoothly.

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18
Q

18) You should signal continuously while turning because:

A

You need both hands on the wheel to turn safely.

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19
Q

19) The primary cause of fatal crashes is:

A

Driving too fast

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20
Q

20) You should try to park so that:

A

you can pull forward when you leave

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21
Q

21) You are driving a vehicle at 45mph on dry pavement. About how much total stopping distance will you need to Bring it to a stop?

A

The length of a football field.

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22
Q

22) When driving at night, you should use your low beams when an oncoming vehicle is within:

A

500 feet

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23
Q

23) You are driving in an area with few streetlights on a clear night. If you cannot see well with your headlights, which of these actions would help?

A

Use your high beams when legal and keep your interior lights off.

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24
Q

24) What happens to tar in road pavement when it gets extremely hot?

A

It bleeds, making the road surface slippery.

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25
Q

25) What is the best advice for drivers when a heavy fog occurs?

A

Park at a truck stop or rest area until the fog has lifted.

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26
Q

26) Which of these statements about cold weather driving is true?

A

Windshield washer antifreeze should be used.

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27
Q

27) Strong winds most affect driving upon:

A

exiting tunnels

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28
Q

Perception distance is the distance your vehicle travels from the time:

A

the eyes see a hazard to the time the brain knows it is a hazard

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29
Q

29) You are driving on a two lane rode. An oncoming driver drifts into your lane headed straight for you. Which of these is most often the best action to take?

A

Steer to the right.

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30
Q

30) You can see a marking on a vehicle ahead of you. The marking is a red triangle with an orange center. What does the marking mean?

A

It is a slow moving vehicle

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31
Q

31) Hydroplanning:

A

is more likely when tire pressure is low

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32
Q

32) What should you do when your vehicle hydroplanes?

A

Release the accelerator.

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33
Q

33) In the event of a rear tire failure, dual rear tires:

A

will usually prevent fishtailing

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34
Q

34) 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.

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35
Q

35) Most serious skids result from:

A

driving too fast for road conditions

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36
Q

36) Over length, over width, or over weight loads:

A

require a special transit permit

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37
Q

37) Containerized loads:

A

are generally used when freight is carried part way by rail or ship

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38
Q

38) Which of these statements about an inspection of suspension components is true?

A

axle mounts should be checked at each point where they are secured on the vehicle frame and axle

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39
Q

39) Should brake adjustment be checked often?

A

Yes, because brakes can get out of adjustments when they are used a lot

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40
Q

40) Which of these is not part of the pre-trip inspection of the engine compartment?

A

Valve clearance.

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41
Q

41) A full stop is required when at a railroad grade crossing when:

A

the nature of the cargo makes a stop mandatory under state, or for incompatible items

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42
Q

42) You do not have have a Hazard Materials Endorsement on your commercial driver’s license. You can drive a vehicle hauling hazardous materials when:

A

the vehicle does not require placards

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43
Q

43) 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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44
Q

44) If your brakes fail on a downgrade, you must first:

A

look outside your vehicle for another means of slowing it

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45
Q

45) To help you stay alert while driving, you should

A

Take short breaks before you get drowsy

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46
Q

46) Which of the following is a good way to react to an aggressive driver?

A

give the driver the benefit of the doubt

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47
Q

47) If you must use a cell phone while driving, you should

A

pull off the road onto a safe and legal position

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48
Q

48) Which of these statements about staying alert to drive is true?

A

sleep is the only thing that can overcome fatigue

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49
Q

49) Medicines used to treat the common cold:

A

often makes you drowsy and thus should not be used while driving

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50
Q

50) Which of these statements about drugs is true?

A

use of drugs can lead to accidents and/or arrest

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51
Q

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

A. under inflated tires will not cause a fire
B. carrying a properly charged fire extinguisher will help prevent a fire
C. poor trailer ventilation can cause cargo to catch on fire

A

C. poor trailer ventilation can cause cargo to catch on fire

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52
Q

52) What will help keep an engine cool in hot weather?

A

making sure the engine has the right amount of oil

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53
Q

53) Which of these statements about marking a stopped vehicle is true?

A
  • If a hill or curve keeps others from seeing the vehicle within 500 feet, the rear triangle should be moved back down the road to give adequate warning
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54
Q

54) Which of these do not provide extra gears on some trucks?

A

Automatic transmissions.

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55
Q

55) Which of these actions is not recommended for a left turn?

A

Start in the middle lane and swing right as you turn.

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56
Q

56) What is counter steering?

A

Turning the wheel back in the opposite direction after steering to avoid an emergency

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57
Q

57) Which of these statements about downshifting is true?

A

When you downshift for a curve, you should do so before you enter a curve.

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58
Q

58) Why is it important to shift gears correctly?

A

Keep control of the vehicle.

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59
Q

59) Backing a commercial vehicle is:

A

always dangerous

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60
Q

60) You see a car approaching from the rear; the next time you check your mirror, the car is gone. You wish to change lanes. You should:

A

wait to change lanes until you are sure the car isn’t in your blindspot

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61
Q

61) The distance you should look ahead of your vehicle while driving is ___ of a mile at highway speed.

A

1/4 (a quarter of a mile)

62
Q

62) You are driving a heavy vehicle. You must exit a highway using an off ramp that curves downhill. You should:

A

slow down to a safe speed before the curve

63
Q

63) When you are driving on a snow packed road you should reduce your speed by at least

A

1/2 (by half of your speed)

64
Q

64) Merging onto a road is safest if you:

A

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

65
Q

65) If you are being tailgated you should:

A

increase your following distance

66
Q

66) What should you do if a car coming toward you at night keeps its high beams on?

A

Look to the right side of the road.

67
Q

67) The road you are traveling on becomes very slippery due to glare ice. Which of these is a good thing to do in such a situation?

A

Stop driving as soon as you can safely do so.

68
Q

68) Your brakes can get wet when driving through heavy raid. What can this cause when your brakes are applied?

A

Trailer jackknifing

69
Q

69) You should avoid driving through deep puddles, or flowing water, but if you must, which of these steps can help keep your brakes working?

A

Gently putting on the brakes while driving through the water

70
Q

70) When driving through work zones you should:

A

use your 4-way flashers or brake lights to warn others

71
Q

71) The best drivers are those who watch and prepare for hazards. This is called being:

A

defensive

72
Q

72) Which of the below is not a characteristic of a front tire failure?

A

Vehicle fishtail

73
Q

73) When hydraulic brakes fail while driving, what action should you take?

A

Pump the brake pedal to generate pressure

74
Q

74) Your vehicle has hydraulic brakes. While traveling on level road you press the pedal and it goes to the floor. Which of the statements is true?

A

Pumping the pedal may bring the pressure up so you can stop the vehicle

75
Q

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

A

A vibrating feeling

76
Q

76) How do you correct a wheel acceleration skid?

A

Stop accelerating

77
Q

77) Which of these systems should receive extra attention during cold weather inspections?

A

Exhaust

78
Q

78) Can federal inspectors inspect your truck or bus?

A

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

79
Q

79) Which of these statements about tires is true?

A

You should inspect your tires every 2 hours or every 100 miles when driving in hot weather.

80
Q

80) If you are not sure what to use to put out hazardous materials fires, you should:

A

wait on qualified firefighters

81
Q

81) When you are driving on grades, which of these is the best way to choose a safe speed?

A

Based on your vehicle and its cargo, select a safe speed that is within the posted speed limit.

82
Q

82) When confronted by an aggressive driver, the very first thing you should do is:

A

make every attempt to get out of their way

83
Q

83) In bad weather, many cars tailgate large vehicles. What should you do?

A

Increase your following distance so you can avoid quick maneuvers

84
Q

84) Which of these is a good thing to remember about drinking alcohol?

A. the driver can control how fast the body gets rid of alcohol
B. small quantities of alcohol increase reaction time
C. alcohol affects judgment and self control, which are necessary for safe driving

A

C. alcohol affects judgment and self control, which are necessary for safe driving

85
Q

85) Which of these statements about vehicle fires is true?

A

A burning tire should be cooled with water

86
Q

86) Optional safety equipment may include emergency numbers, tire chains, and:

A

tire changing equipment

87
Q

87) After starting the engine:

A

the coolant temperature gauge should begin a gradual rise to the normal range

88
Q

88) Retarders can be used:

A

only where it is permitted by law

89
Q

89) 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.

90
Q

90) What is the term for a commercial driver’s habit of swinging wide in a turn?

A

Off tracking

91
Q

91) Which of these statements about double clutching and shifting are true?

A

You can use the tachometer to tell when to shift.

92
Q

92) According to the driver’s manual, why should you limit the use of your horn?

A

It can startle other drivers

93
Q

93) You are driving a vehicle that can be safely driven at 55mph, but traffic is heavy and moving at 35mph even through the limit is 55mph. What is the safest speed for you?

A

35mph

94
Q

94) Whenever you double your speed, how much more distance does it take to stop?

A

4 times the distance

95
Q

95) How does vehicle weight effect stopping?

A

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

96
Q

96) Which of these statements about overhead clearance is true?

A

The weight of a vehicle changes its height.

97
Q

97) Which of these is a good thing to do when driving at night?

A

Keep your speed slow enough that you can stop in the range of your headlights.

98
Q

98) Which of these will be most affected by strong winds?

A

A set of empty doubles

99
Q

99) When the roads are slippery, you should:

A

Make turns as gently as possible

100
Q

100) Which of these is not true about emergency braking?

A

It is not important how you brake in an emergency.

101
Q

101) Which of these is the most important thing to remember about emergency braking?

A

If the wheels are skidding, you cannot control your vehicle.

102
Q

102) Where or how is cargo blocking used?

A

In the front, sides, and back of cargo, usually at the floor.

103
Q

103) Bridge formulas:

A

permit less maximum axle weight for axles that are closer together

104
Q

104) You are checking your brakes and suspension in a pre-trip inspection. Which of these statements is true?

A

Brake shoes should not have oil, grease, or fluid on them.

105
Q

105) What is is the most important reason to inspect your truck or bus?

A

Safety

106
Q

106) Drivers of trucks and tractors with cargo must check the securement of the cargo within how many miles of starting the trip?

A

50 miles

107
Q

107) You do not have the hazardous materials endorsement on your CDL. You are asked to haul a load of hazardous materials requiring placards. You should:

A

refuse to haul the load

108
Q

108) What is the first thing you should do if your brakes fail while going down a hill?

A

Get off the road as soon as possible.

109
Q

109) Escape ramps:

A

should be used by any driver who loses braking power

110
Q

110) Which of the following can best describe how sleep debt can be paid off?

A

It can only be paid off by sleeping

111
Q

111) If you have been drinking alcohol, you should:

A

wait for it to wear off

112
Q

112) When the doctor prescribes medication to you and you know you will be driving, you should:

A

ask the doctor if the medicine will affect your driving

113
Q

113) To determine the blood alcohol concentration (BAC) for a person, it is necessary to know what?

A

How much the person weighs.

114
Q

114) Which of these is not a good rule to follow when caring for the injured at an accident scene?

A

Keep the injured person cool

115
Q

115) You should use your mirrors to check:

A

where the rear of the vehicle is while you make your turns

116
Q

116) Which of these statements about backing a heavy vehicle is true?

A

You should avoid backing whenever you can.

117
Q

117) If you must cross into the oncoming as you make a turn, you should:

A

watch for oncoming traffic

118
Q

118) When you are parked at the side of the road, you must:

A

turn on your 4 way flashers to warn others

119
Q

119) Which of these statements about speed management is true?

A

You should choose a speed that lets you stop in the distance you can see ahead.

120
Q

120) When driving on roads where truck speed limits are slower than cars, you should:

A

use extra caution when changing lanes or passing

121
Q

121) You are driving a 40ft vehicle at 35mph What is the least amount of space you should keep between your vehicle and the one in front of you?

A

4 seconds

122
Q

122) What 3 things add up to the total stoping distance for your truck or bus?

A

Perception distance, reaction distance, and braking distance.

123
Q

123) When driving at night you should use your low beams when an oncoming vehicle is within:

A

500 feet

124
Q

124) What should you do before driving in mountains?

A

Know the escape ramp locations on your route.

125
Q

125) A car cuts in front of you creating a hazard. Which of these actions should you not take?

A

Honk and stay close behind the car

126
Q

126) What should you do when you see a hazard in the roadway ahead of you?

A

Use your 4-way flashers or brake lights to warn others

127
Q

127) You are driving on a level highway at 50mph. There are no other vehicles around you. A tire blows out on your vehicle. What should you do first?

A

Stay off the brake until the vehicle has slowed down.

128
Q

128) What does emergency braking mean?

A

Responding to a hazard by slowing the vehicle.

129
Q

129) Having ABS on only the tractor will:

A

give you more control over the vehicle

130
Q

130) Which statements about cargo is true?

A

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

131
Q

131) A principle to remember about loading cargo is to keep the load:

A

balanced in the cargo area.

132
Q

132) Which of these is not a brake check you normally do during the walk around inspection?

A

Hydraulic cylinder leaks

133
Q

133) Which of these items is not checked in the pre-trip inspection?

A

Amount of fuel in the vehicle.

134
Q

134) Which of these statements about shipping hazardous materials is true?

A

A diamond-shaped hazardous label must be on the package.

135
Q

135) Placards must be:

A

Placed on all 4 sides of the vehicle

136
Q

136) You must stop on a hill or a curve on a divided highway. How far back should you place the rear most triangle?

A

As far bas as necessary to warn others

137
Q

137) You are driving a newer truck with a manual transmission. What gear will you need to take a long downhill grade?

A

a lower gear than you used to climb the hill.

138
Q

138) Aggressive driving is:

A

driving a vehicle in a bold, selfish, pushy manner

139
Q

139) ABS uses sensors and computers to sense:

A

potential wheel lockup

140
Q

140) The distance you should look ahead of your vehicle while driving at low speeds is what distance?

A

1 block

141
Q

141) At dawn, or dusk, or in snow, it can be hard to see and be seen. You can let others know you are there by:

A

turning on your lights

142
Q

142) You are driving through a work zone. You should:

A

lower you speed even farther any time workers are present

143
Q

143) When driving down a mountain, you will have to use lower gears to drive safely. Which of these does not affect your choice of gears?

A

Tire tread depth

144
Q

144) Which of these is a danger of crossing tracks on a dirt road?

A

You could get hung halfway across the tracks

145
Q

145) Which of these is a good thing to do when steering to avoid a crash?

A

Don’t turn more than needed to miss whatever is in your way.

146
Q

146) If a straight truck goes into a front wheel skid, it will:

A

go straight ahead even if the wheels are turned

147
Q

147) Which of these lights cannot be checked at the same time?

A

turn signals, brake lights, and 4-way flashers

148
Q

148) When driving in cold weather, your tire tread depth should:

A

provide enough traction to steer and get through snow

149
Q

149) If you react ___ slower, your chances of a crash can double.

A

1/2sec (Half of a second)

150
Q

150) Which of these is true about hours of service?

A

You should balance your hours of service with enough sleep to keep you alert.

CDL Answers (3 decks)

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