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CA CDL Written Test > General Knowledge > Flashcards

General Knowledge Flashcards

1
Q

What is the most important reason for doing a vehicle inspection?

A

Safety is the most important reason to inspect your vehicle

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2
Q

What things should you check during a trip?

A

Watch gauges for signs of trouble

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3
Q

Name some key steering parts.

A

Spindle, tie rod, drag link

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4
Q

Name a suspension system defect.

A

Leaking shock absorbers

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5
Q

What 3 kinds of emergency equipment should you have?

A

Fire extinguisher, spare electrical fuses, warning device

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6
Q

What is the minimum tread depth for front tires?

A

4/32 inch

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7
Q

What is the minimum tread depth for other tires?

A

2/32 inch

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8
Q

Name some things you should check on the front of your vehicle during the walk-around inspection?

A

Signal and clearance lights, headlights

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9
Q

What should wheel bearing seals be checked for?

A

Leaking

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10
Q

How many reflective triangles should you carry?

A

3

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11
Q

Why should you back toward the driver’s side?

A

Because you can see better

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12
Q

1)What is a pull-up?

A

Re-positioning of your vehicle when backing

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13
Q

1)If stopped on a hill, how can you start moving without rolling back?

A

Partly engage clutch before taking your foot off the brake

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14
Q

1)When backing, why is it important to use a helper?

A

To help avoid blind spots

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15
Q

1)What’s the most important hand signal that you and the helper should agree on?

A

Stop

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16
Q

1)What are the 2 special conditions where you should downshift?

A

Before starting down a hill and before entering a curve

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17
Q

1)When should you downshift automatic transmissions?

A

Before starting downgrade

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18
Q

1)Retarders keep you from skidding when the road is slippery. True or False?

A

False

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19
Q

1)What are the 2 ways to know when to shift?

A

Engine speed, road speed

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20
Q

1)How far ahead should you look when driving?

A

12 to 15 seconds

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21
Q

1)What are the 2 main things to look for ahead?

A

Traffic and road conditions

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22
Q

1)What’s your most important way to see the sides and rear?

A

Use your mirrors

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23
Q

1)What does “communicating” mean in safe driving?

A

Signaling your intentions

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24
Q

1)Where should your reflectors be placed when stopped on a divided highway?

A

10’/100’/100’

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25
Q

1)What 3 things add up to total stopping distance?

A

Perception distance/ reaction distance/ braking distance

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26
Q

1)If you go twice as fast, your stopping distance will increase by twice or 4 times?

A

Four times

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27
Q

1)Empty trucks have the best braking. True or False?

A

False

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28
Q

1)What is “hydroplaning”?

A

Tires lose contact with road and have no traction

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29
Q

1)What is “black ice”?

A

Thin sheet of clear ice on roadway

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30
Q

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

A

True

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31
Q

1)What should you do before you drive if you are drowsy(adj. 昏昏欲睡的)?

A

sleep

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32
Q

1)What effects can wet brakes cause?

A

Lack of braking power

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33
Q

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

A

False

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34
Q

1)You can safely remove the radiator cap as long as the engine isn’t overheated. True or False?

A

False

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35
Q

1)What factors determine your selection of a “safe” speed when going down a long, steep downgrade?

A

Weight of vehicle/ length of grade/ steepness/ road conditions/ weather

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36
Q

1)Why should you be in proper gear before starting down a hill?

A

You may not be able to shift back into any gear and all braking effect will be lost

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37
Q

1)Describe the proper braking technique when going down a long, steep downgrade.

A

Apply brakes to 5mph below safe speed. Release and repeat.

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38
Q
  1. What is a “hazard”?
A

Any road condition or user that is a possible danger

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39
Q

Why make emergency plans when you see a hazard?

A

So you will have more time to act

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40
Q

Stopping is not always the safest thing to do in an emergency. True or False?

A

True

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41
Q

1)What is an advantage of going right instead of left around an obstacle?

A

You will avoid drivers passing on the left

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42
Q

1)What is an “escape ramp”?

A

An exit at the bottom of a hill to slow you down and stop

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43
Q

1)If a tire blows out, you should put the brakes on hard to stop quickly. True or False?

A

False

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44
Q

What is one thing to do at an accident scene to prevent another accident?

A

Put out flare(照明弹)s

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45
Q

1)Name 2 causes of tire fires?

A

Under inflated tires and duals that touch

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46
Q

What kind of fire is a B, C extinguisher good for?

A

Electrical, fuel

PS：A Class C fire extinguisher is used on fires that involve live electrical equipment.

Class B fires involve flammable and combustible liquids such as gasoline, alcohol, oil-based paints, lacquers.

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47
Q

When using your extinguisher, should you get as close as possible to the fire?

A

No

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48
Q

Name a cause of vehicle fires.

A

Flammable cargo

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49
Q

For what 3 things related to cargo are drivers responsible?

A

Inspection of cargo, balanced weight of cargo, secured cargo

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50
Q

1)How often while on the road must you stop to inspect your cargo?

A

Every 3 hours or 150 miles

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51
Q

1)What is the “gross combination weight” (GVW)?

A

Weight of power unit, plus trailer, plus cargo

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52
Q

1)Name a situation where legal maximum weight may not be safe.

A

Mountain traveling

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53
Q

What can happen if you don’t have enough weight on the front axle?

A

Can cause poor traction

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54
Q

1)What is the minimum number of tie downs for a 20 foot load?

A

At least one tie down for every 10 feet

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55
Q

What is the minimum number of tie downs for any flatbed(a.平板的) load?

A

2

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56
Q

Name 1 basic reason for covering cargo on an open road.

A

Protect the cargo from weather

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57
Q

What must you check before transporting a sealed load?

A

Check that you don’t exceed weight restrictions

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58
Q

Stab braking should not be used on vehicles:

PS: Stab braking is the a system which is prevalent(a. 普遍的) even today in cars without anti-lock braking system. It is a kind of wheel locking mechanism, where you brake hard and the wheels get locked immediately. When you hear the screeching sound, you release the brake pedal and hit it hard again within a second.

A

Equipped with anti-lock brakes

PS: An anti-lock brake system, ABS, is a system which is designed to prevent you from “locking” up your brakes, or applying so much pressure to your brakes that the axle and your wheels themselves stop turning completely.

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59
Q

What should you always do when travelling down a long downgrade?

A

Use the braking effect of the engine

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60
Q

Bridge formulas are designed to:

PS: The bridge formula is: W = 500 ((LN/(N-1)) + 12N + 36).

W = the overall gross weight of any two or more consecutive axles to the nearest 500 lbs.

L = the distance (in feet) between the outer axles in a group of two or more axles.

N = the number of axles in the group.

A

Permit less maximum axle weight for axles that are closer together

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61
Q

Which statement is true?

A

Drivers with rental trucks are often not used to driving a large vehicle and may be more dangerous

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62
Q

1)The first offense for driving a commercial vehicle under the influence of drugs or alcohol will cause you to lose your CDL for:

A

1 year

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63
Q

Your vehicle will be placed “out of service” if this many leaves of springs are broken or missing?

A

One fourth of total number

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64
Q

Can your truck or bus be inspected by federal inspectors?

A

Yes, and can also place you out of service

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65
Q

Can I use over-the-counter medication when operating a CMV?

A

Should not be used because it can make you sleepy

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66
Q

Which of these statements is True?

A

Many accidents occur between 12 am and 6 am

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67
Q

Which statement is True about rear drive-wheel braking skids?

A

When pulling a trailer, the trailer can push the towing vehicle sideways.

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68
Q

Which of these can you NOT check at the same time?

A

Brake lights, 4 way flashers and turn signal

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69
Q

1)Which of the following will occur after you start your engine?

A

The water temperature gauge will rise to normal operating temp.

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70
Q

1)If your vehicle is 40 feet long and you are travelling 50 mph, what is the safe following distance?

A

5 seconds

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71
Q

You can be placed out of service if your Blood Alcohol Concentration is:

A

Any amount detectable

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72
Q

What should you do when you see a hazard in the road in front of you?

A

Turn on your 4 way flashers to warn other drivers

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73
Q

1)Why should you conduct a pre-trip inspection?

A

To make sure the vehicle is safe to operate

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74
Q

1)What happens when a tire blows out at highway speed?

A

You will feel a vibration

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75
Q

1)Which of these statements is True about tire pressure?

A
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76
Q

1)You should use your horn:

A

To help you avoid a collision

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77
Q

Convex(凸面的) mirrors will:

A

Show a wider view than flat mirrors

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78
Q

1)What type of fire will water extinguish?

A

Tire

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79
Q

If you are traveling down a long grade and your brakes start to get weak, you should:

A

Stop as quickly as possible

80
Q

1)Why is it important to shift gears properly?

A

To help maintain control of the vehicle

81
Q

1)When starting off on dry, level pavement(路面), it is normally not necessary to:

A
  1. Press on the gas pedal and pop out the clutch
  2. Apply the parking brake
  3. Both A and B
82
Q

1)With low-beam headlights on, you can see

A

250 feet ahead

83
Q

Which of these conditions can produce a skid?

A
  1. Over steering
  2. Over braking
  3. Driving too fast
  4. All of the above
84
Q

What should you do if you are being tailgated（vi 紧跟行驶）?

A

Increase following distance

85
Q

When should you use controlled braking?

A

To keep the vehicle in a straight line when braking

86
Q

Which of the following is true when driving in cold weather?

A

Use anti-freeze in your windshield washer fluid

87
Q

1)When drinking alcohol, which is affected first?

A

Judgment and self control

88
Q

When backing to a dock, which of the following is NOT True?

A

Back slowly until you bump the dock

89
Q

1)What is controlled braking?

A

Applying brake firmly, but not enough to lock up

90
Q

What should you do when travelling through a construction zone?

A

Watch for holes in the road and drop offs

91
Q

1)When your brakes are wet, it is very easy to:

A

Jackknife( vt.(铰接车失控时)弯折成V形) the trailer

92
Q

If you are stopped on the shoulder of the road on a divided highway, you must:

A

Place reflective triangles or flares within 10 minutes of stopping

93
Q

1)The maximum speed limit for a school bus on a highway is:

A

55 mph

94
Q

When conducting a pre-trip inspection of the steering system, you would not inspect:

A

Leaking shock absorbers

95
Q

1)Before entering a curve, you should:

A

Slow down to a safe speed and downshift before entering the curve

96
Q

You must come to a full stop at railroad crossings:

A

When carrying passengers or hazardous cargo

97
Q

1)You may not drive for more than____hours following your last period of 8 consecutive hours off duty.

A

10

98
Q

1)About____of all fatal crashes involving drinking drivers.

A

One-half

99
Q

When you double your speed, it takes ___\_ times as much distance to stop your vehicle.

A

4

100
Q

1)“Offtracking” is:

A

Trailer wheels following a different path than the tractor wheels

101
Q

How far ahead should a driver be looking while driving a vehicle?

A

1/4 mile.

102
Q

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

A

slow down to a safe speed before the ramp.

103
Q

1)Which of these statements are true about downshifting?

A

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

104
Q

Which fires can you put out with water?

A

tire fires.

105
Q

Which of these statements about backing a heavy vehicle is true.

A

You should avoid backing whenever you can.

106
Q

The key point in balancing cargo weight is to keep the load.

A

centered

107
Q

In normal driving, some drivers use the hand valve before the brake pedal to prevent a jackknife. Which of these statements are true?

A

This should not be done.

108
Q

There are two things a driver can do to prevent a rollover, the first, keep the cargo as close to the floor as possible and what is the other?

A

go slow around turns.

109
Q

Brakes can get wet when you drive through heavy rain. Wet brakes can cause?

A

A. wheel lockup.

B. trailer jackknife.

C. pulling to one side.

D. all the above.

110
Q

You are checking your steering and exhaust systems during a pre-trip inspection. Which of these statements is true?

A

Steering wheel play of more than 10 degrees ( 2 inches on a 20-inch steering wheel) can make it hard to steer.

111
Q

Your vehicle is in a traffic emergency and may collide (vt.碰撞) with another vehicle if you do not take action.

A

You can almost always turn to miss an obstacle more quickly than you can stop.

112
Q

Which of these is a good rule to follow when driving at night?

A

Keep your speed slow enough to stop within the range of your headlights.

113
Q

Which of these statements are true about brakes?

A

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

114
Q

Which of these is the most important thing to remember about emergency brakes?

A

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

115
Q
A
116
Q

How do you test hydraulic brakes for leaks?

A

With vehicle stopped, pump the pedal three times, apply firm pressure, hold for five seconds and see if the pedal moves.

117
Q

You do not have a hazardous materials endorsement（n. 背书） on your commercial driver license. When can you legally haul hazardous materials?

A

When the load does not require placard(n. 标语牌)s.

118
Q

You are checking your wheels and rims during a pre-trip inspection. Which of these statements is true?

A

Rust around wheel nuts may mean they are loose.

119
Q

To avoid a crash, you had to drive on the right shoulder. How should you move back onto the pavement?

A

Come to a complete stop, if possible, before steering back onto the pavement.

120
Q

If you are being tailgated, you should?

A

Increase the space in front of your vehicle.

121
Q

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

A

The only thing that can cure fatigue(n.疲劳) is sleep.

122
Q

Which of these statements about speed management is true?

A

Choose a driving speed that lets you stop in the space that you can see ahead.

123
Q

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

A

12-15 seconds.

124
Q

You are driving a 40 foot vehicle at 45 mph. Driving conditions are ideal (dry pavement, good visibility). The least amount of space that you should keep in front of your vehicle to be safe is the distance you would travel in:

A

5 s

125
Q

Which of these statements about drinking alcohol is true?

A

A few beers have the same effect on driving as a few shots of whiskey.

126
Q

As the Blood Alcohol Concentration (BAC) goes up, what happens?

A

The person is even more dangerous if allowed to drive.

127
Q

Driving under the influence of a drug which makes you drive unsafely is?

A

Against the law.

128
Q

You wish to turn right from a two-lane street to another two-lane street. Your vehicle is so long that you must swing wide to make the turn. Which of these drawings show how the turn should be made?

A

B

129
Q

Some traffic emergencies may require you to leave the road. Which of these is a good thing to remember?

A

You should avoid braking until your speed has dropped to about 20 mph.

130
Q

Cargo that can shift should have at least ___\_ tie-downs?

A

2

131
Q

Which of these statements about cargo loading is true?

A

State regulations dictate(vt. 决定) legal weight limits.

132
Q

If a straight vehicle goes into a front wheel skid, it will?

A

Go straight ahead even if the steering wheel is turned.

133
Q

The most common cause of serious vehicle skids is?

A

Driving too fast for road conditions.

134
Q

Which of these statements about downshifting is true?

A

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

135
Q

You should avoid driving through a deep puddle(n. 水坑)s or flowing water. But if you must, what will keep your brakes working?

A

Gently pressing the brake pedal while driving through the water.

136
Q

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

A

You should avoid backing whenever you can.

137
Q

High beams should?

A

Be used whenever it is safe and legal to do so.

138
Q

Stab Braking -

A

Involves locking the wheels.

139
Q

For an average driver driving 55 MPH on dry pavement, it will take about to bring the vehicle to a stop.

A

The length of a football field.

140
Q

The parking brake should be tested while the vehicle is?

A

Moving slowly.

141
Q

Controlled braking -

A

Apply the brakes as hard as you can without locking the brakes.

142
Q

The vehicle in front of you has a red triangle with an orange centre on the rear. What does this mean?

A

It is a slow moving vehicle.

143
Q

You must park on the side of a level, straight, two-lane road. Where should you place the three reflective triangles?

A

One within 10 feet of the rear of the vehicle, one about 100 feet to the rear of the vehicle, and one about 100 feet from the front of the vehicle

144
Q

The key principle in balancing cargo weight is to keep the load?

A

Centered.

145
Q

When should you check your load?

A

Before you leave, after the first 25 miles and every 150 miles or 3 hours.

146
Q

If a vehicle is loaded with very little weight on the front axle, what can happen?

A

Poor traction.

147
Q

Cargo inspections

A

Should be done at every break during trip.

148
Q

How do you correct a rear-wheel acceleration skid?

A

Stop accelerating and push in the clutch.

149
Q

Which of these statements about double-clutching and shifting is true?

A

You can use the sound of the engine to tell you when to shift.

150
Q

Which of these statements about tires and hot weather driving are true?

A

You should inspect your tires more often.

151
Q

What should you do if your vehicle hydroplanes?

A

Release the accelerator.

152
Q

You must make a very quick stop. You should brake so you:

A

Stay in a straight line and can steer.

153
Q

While driving, you see a small (1 foot square) cardboard box ahead in your lane. You should:

A
154
Q

Which of these statements about overhead clearance is true?

A

A vehicle’s clearance can change with the load carried.

155
Q

When you are on top of a hill and know you will be going down a steep grade, which statement is true?

A

Always downshift to a gear lower than you came up the hill before starting down the grade.

156
Q

You are driving a vehicle with a light load, traffic is moving at 35 MPH in a 55 MPH zone. The safest speed for your vehicle in this situation is most likely:

A

35 MPH.

157
Q

What sort of things should you inspect during a trip?

A

gauges, brakes, lights, cargo, and coupling devices.

158
Q
A
159
Q

When should you downshift your vehicle?

A
  1. Before going down hill.
  2. Before entering a curve.
  3. Going up a hill.
  4. All the above.
160
Q

Which item is a key suspension part?

A
  1. Tie rod.
  2. Drag link.
  3. Pitman arm.
  4. None of the above.
161
Q

What factors determine a persons blood alcohol content?

A
  1. How much alcohol you drink.
  2. How fast you drink.
  3. How much you weigh.
  4. All the above.
162
Q

Perception(n.知觉，感觉) distance is?

A

The distance travelled from the time your eyes see a hazard until the time your brain recognizes the hazard.

163
Q

When driving how far ahead should you be looking?

A

12 – 15 seconds.

164
Q

Doubling your speed has what effect on braking distance?

A

Twice the speed = four times the stopping distance.

165
Q
A
166
Q

Hazardous material placards are:

A
  1. Placed on the front, rear, and both sides of the vehicle.
  2. 10 and ¾ inches square.
  3. Turned up right on a point, in a diamond shape.
  4. All of the above.
167
Q

Which of these requires the greater stopping distance?

A

An empty vehicle.

168
Q

You are convict(vt.证明……有罪)ed of speeding in your personal vehicle and issued a ticket. What are your responsibilities to your employer?

A

CDL holders must report convictions for traffic violations ( except parking violations ) to employers within 30 business days.

169
Q

Which of the following emergency items are you not required to have available?

A

First aid kit.

170
Q

Underinflated tires can cause a fire.

A

True

171
Q

When backing and turning, you should:

A
  1. Back and turn towards the driver’s side.
  2. Use a helper if possible.
  3. Check your path before you begin backing.
  4. All of the above.
172
Q

Which of the following is a basic step to take after an accident?

A
  1. Protect the area.
  2. Notify the authorities.
  3. Care for the injured.
  4. All of the above.
173
Q

Which of the following is not a CDL skills examination?

A

Materials handling test.

174
Q

What is the minimum number of tie-downs required for a small load?

A

2

175
Q

How many warning triangles are you required to carry in your vehicle?

A

3

176
Q

The acronym “ GVW “ means?

A

Gross vehicle weight.

177
Q

When inspecting brakes components you should pay special attention to:

A
  1. Cracked brake drums.
  2. Brake shoes with oil, grease or fluid on the shoes.
  3. Broken, missing, damaged or heavily worn shoes.
  4. All of the above.
178
Q

Battery fluid is classified as a:

A

Corrosives.

179
Q

When using a helper to back up, What is the most important hand signal?

A

Stop.

180
Q

What is the minimum tread depth for a front tire?

A

4/32 of an inch.

181
Q

Your vehicle brakes down on an undivided highway. There are no hills or curves within a mile in either direction. Where should you place the warning triangles?

A

100 feet in front, 10 feet behind and 100 feet behind the vehicle.

182
Q

A fire extinguisher with a C rating is designed for what type of fires?

A

Electrical fires and burning liquids only.

183
Q

When transporting cargo, how often should you check your load?

A

Within the first 25 miles of the trip and every 150 miles or every 3 hours afterwards, which ever comes first.

184
Q

You should always aim the fire extinguisher at the top of the flames so that the chemicals will fall onto the fire.

A

False.

185
Q
A
186
Q

How many classes of hazardous materials are there?

A

9

187
Q

When should a driver consider turning off a retarder(n. 减速器) system on the vehicle?

A

During wet and icy road conditions.

188
Q

When caring for an injured person, you should:

A
  1. Only move them if they are in danger from fire or traffic.
  2. Apply direct pressure to any wounds.
  3. Keep the injured person warm.
  4. All of the above.
189
Q

Should your vehicle catch fire, it is best to pull into a service station because they have plenty of fire fighting equipment?

A

False.

190
Q

When loading the cargo compartment of a vehicle it is best to place heavy items on the bottom and the light items on top.

A

True.

191
Q

What are the three rules for using your turn signals?

A
  1. Signal early 2. Signal continuously 3. Make sure the signal turns off after the turn is completed.
192
Q

Which item is a key steering system part?

A

Pitman arm.

193
Q

Blocking is used to keep the cargo from shifting.

A

True.

194
Q

When fighting an engine compartment fire, it is best to lift the hood in order to target the fire’s base.

A

False.

195
Q

Reaction time or distance is?

A

The distance travelled from the time your brain tells your foot to move from the accelerator to actually push on the brake pedal.

CA CDL Written Test (3 decks)

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