問題一覧
1
As the blood alcohol concentration (BAC) goes up, what happens?
judgment and self control are affected
2
implied consent means
you have given your consent to be tested for alcohol in your blood
3
The total weight of the powered unit, the trailer, and the cargo is called
gross combination weight
4
If you do not have a CB radio, what is the 1" thing you should do at an accident scene?
protect the area
5
Which of these is true about mirror adjustment?
you should adjust your mirrors prior to starting a trip
6
Brake fade:
can be caused by the brakes getting very hot
7
On which fires can water be used?
tires
8
Which of these statements about engine overheating is true?
you should never remove the radiator cap on a pressurized system until it has cooled
9
Which of these is not a danger of rough acceleration?
tire damage
10
Which of these is true about the use of a heater?
when driving in winter weather, you should check that the heater is working properly
11
What is the proper way to hold the steering wheel?
with both hands firmly, on opposite sides of the wheel
12
If you have a heavy load that is slowing you down on an upgrade, you should:
shift into a lower gear
13
Which of these is not a danger when an automatic transmission is forced into a low gear at high speeds?
loss of steering control
14
If possible, a helper should be used to help back your vehicle:
whenever you have to back
15
When looking ahead of your vehicle while driving you should look:
back and forth, near and far
16
How far ahead of the vehicle should the driver look while driving?
12-15 seconds
17
Which of these is the proper way to signal to change lanes?
signal early and change lanes slowly and smoothly
18
You should signal continuously while turning because:
you need both hands on the wheel to turn safely
19
The primary cause of fatal crashes is:
driving too fast
20
You should try to park so that:
you can pull forward when you leave
21
You are driving a vehicle at 45 mph on dry pavement. About how much total stopping distance will you need to bring it to a stop?
the length of a football field
22
When driving at night, you should use your low beams when an oncoming vehicle, within:
500 feet
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?
use your high beams when legal and keep your interior light off
24
What happens to tar in road pavement when it gets extremely hot?
it bleeds, making the road surface slippery
25
What is the best advice for drivers when a heavy fog occurs?
park at a truck stop or rest area until the fog has lifted
26
Which of these statements about cold weather driving is true?
windshield washer antifreeze should be used
27
Strong winds most affect driving:
upon exiting tunnels
28
Perception distance is the distance your vehicle travels from the time:
the eyes see a hazard to the time the brain knows it is a hazard
29
You are driving on a two lane road. An oncoming driver drifts into your lane headed straight for you. Which of these is most often the best action to take?
steer to the right
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?
it may be a slow moving vehicle
31
Hydroplaning:
is more likely when tire pressure is low
32
What should you do when your vehicle hydroplanes?
release the accelerator
33
In the event of a rear tire failure, dual rear tires:
will usually prevent fishtailing
34
Which of these is correct about emergency or evasive action?
in order to turn quickly you must have a firm grip on the steering wheel
35
Most serious skids result from:
driving too fast for conditions
36
Over length, over width, or over weight loads
require a special transit permit
37
Containerized loads:
are generally used when freight is carried part way by rail or ship
38
which of these statements about an inspection of suspension components is true?
axle mounts should be checked at each point where they are secured on the vehicle frame and axle
39
Should brake adjustment be checked often?
yes, because brakes can get out of adjustment when they are used a lot
40
Which of these is NOT part of the pre-trip inspection of the engine compartment?
valve clearance
41
A full stop is required at a railroad grade crossing when:
the nature of the cargo makes a stop mandatory under state, or for incompatible items
42
You do NOT have a Hazard Materials Endorsement on your commercial driver's license. You can drive a vehicle hauling hazardous materials when:
the vehicle does not require placards
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?
use the parking brake to hold the vehicle until the clutch engages
44
If your brakes fail on a downgrade, you must first:
look outside your vehicle for another means of slowing it
45
To help you stay alert while driving, you should
Take short breaks before you get drowsy
46
Which of the following is a good way to react to an aggressive driver?
give the driver the benefit of the doubt
47
If you must use a cell phone while driving, you should
pull off the road onto a safe and legal position
48
Which of these statements about staying alert to drive is true?
sleep is the only thing that can overcome fatigue
49
Medicines used to treat the common cold:
often makes you drowsy and thus should not be used while driving
50
Which of these statements about drugs is true?
use of drugs can lead to accidents and/or arrest
51
Which of these statements about causes of vehicle fires is true?
poor trailer ventilation can cause cargo to catch on fire
52
What will help keep an engine cool in hot weather?
making sure the engine has the right amount of oil
53
Which of these statements about marking a stopped vehicle is true?
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
54
Which of these do not provide extra gears on some trucks?
automatic transmissions
55
Which of these actions is not recommended for a left turn?
start in the inside lane and swing right as you turn
56
What is counter steering?
turning the wheel back in the opposite direction after steering to avoid an emergency
57
Which of these statements about downshifting is true?
when you downshift for a curve, you should do so before you enter the curve
58
Why is it important to shift gears correctly?
keep control of the vehicle
59
Backing a commercial vehicle is:
always dangerous
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:
wait to change lanes until you are sure the ear isn't in your blind spot
61
The distance you should look ahead of your vehicle while driving is of a mile at highway speed
¼
62
You are driving a heavy vehicle. You must exit a highway using an off ramp that curves downhill. You should:
slow down to a safe speed before the curve
63
When you are driving on a snow packed road you should reduce your speed by at least
½
64
Merging onto a road is safest if you
wait for a large enough gap in traffic to enter the road
65
If you are being tailgated you should:
increase your following distance
66
What should you do if a car coming toward you at night keeps its high beams on?
look at the right side of the road
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?
stop driving as soon as you can safely do so
68
Your brakes can get wet when driving through heavy rain. What can this cause when the brakes are applied?
trailer jackknife
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?
gently putting on the brakes while driving through the water
70
When driving through work zones you should:
use your 4-way flashers or brake lights to warn others
71
The best drivers are those that watch and prepare for hazards. This is called being:
defensive
72
Which of the below is not a characteristic of a front tire failure?
vehicle fishtail
73
When hydraulic brakes fail while driving, what action should you take?
pump the brake pedal to generate pressure
74
Your vehicle has hydraulic brakes. While traveling on level road you press the pedal and it goes to the floor. Which of these statements is true?
pumping the pedal may bring pressure up so you can stop the vehicle
75
Which of these happens when a tire blows out at highway speed?
a vibrating feeling
76
In bad weather, many cars tailgate large vehicles. What should you do?
increase your following distance so you can avoid quick maneuvers
77
Which of these is a good thing to remember about drinking alcohol?
alcohol affects judgment and self control, which are necessary for safe driving
78
Which of these statements about vehicle fires is true?
a burning tire should be cooled with water
79
Optional safety equipment may include emergency numbers, tire chains, and:
tire changing equipment
80
After starting the engine:
the coolant temperature gauge should begin a gradual rise to the normal range
81
Retarders can be used:
only where permitted by law
82
Which of these statements about brakes is true?
the heavier a vehicle or the faster it is moving the more heat the brakes have to absorb to stop it
83
What is the term for a commercial vehicle's habit of swinging wide in a turn?
off tracking
84
Which of these statements about double clutching and shifting are true?
you can use the tachometer to tell when to shift
85
According to the driver's manual, why should you limit the use of your horn?
it can startle other drivers
86
You are driving a vehicle that could be safely driven at 55, but traffic is heavy and moving at 35 even though the limit is 55. What is the safest speed for you?
35 MPH
87
Whenever you double your speed, how much more distance does it take to stop?
4 times the distance
88
How does vehicle weight effect stopping?
empty trucks can take longer to stop than loaded ones, but this is usually not the case for buses
89
Which of these statements about overhead clearance is true?
the weight of a vehicle changes its height
90
Which of these is a good thing to do when driving at night?
keep your speed slow enough that you can stop in the range of your headlights
91
Which vehicle will be most affected by strong winds?
a set of empty doubles
92
When the roads are slippery, you should:
make turns as gently as possible
93
Which of these is not true about emergency braking?
it is not important how vou brake in an emergency
94
Which of these is the most important thing to remember about emergency braking
if the wheels are skidding you cannot control your vehicle
95
Where or how is cargo blocking used?
in the front, sides, and back of cargo, usually at the floor
96
Bridge formulas:
permit less maximum axle weight for axles that are closer together
97
You are checking your brakes and suspension in a pre trip inspection. Which of these statements is true?
brake shoes should not have oil, grease, or fluid on them
98
What is the most important reason to inspect your truck or bus?
safety
99
Drivers of trucks and tractors with cargo must check the securement of the cargo within how many miles of starting the trip?
50
100
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:
refuse to haul the load