Commercial Drivers License Permit Test 2024 with answers
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Drivers license
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Drivers License
If a vehicle transporting explosives is involved in an accident, what should be done before moving the vehicles apart? - Answer- remove all explosives before pulling them apart, place the explosives at least 200 feet from the vehicles and occupied buildings, keep bystanders away
Which of these s...
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Commercial Drivers License Permit Test 2024
If a vehicle transporting explosives is involved in an accident, what should be done
before moving the vehicles apart? - Answer- remove all explosives before pulling them
apart, place the explosives at least 200 feet from the vehicles and occupied buildings,
keep bystanders away
Which of these statements about double-clutching and shifting is true? - Answer- you
can use the tachometer to tell you when to shift
How long can an unsafe vehicle be put out of service? - Answer- until the driver or
owner fixes it
Which of these should be considered a hazard? - Answer- an ice cream truck, a blind
intersection, a driver signaling a turn
Of the following choices, which best describes how you should use your brake pedal
when going down a steep hill? - Answer- a light steady pressure
Inspection of vehicles by the driver is mandated by: - Answer- federal and state laws
When you dim your lights at night, what should you do about your speed? - Answer-
slow down
Of the following statements, which is true about speed? - Answer- you should choose a
speed that will allow you to stop within the distance you can see ahead
While on a trip, what should you check on a regular basis? - Answer- watch gauges,
use your senses, check critical items when you stop
The emergency door on your bus must: - Answer- it must be closed when operating the
bus
Which one of the following best describes the basic characteristics of the center of
gravity? - Answer- the center of gravity can make a vehicle more likely to tip over on a
curve if it is high
Vehicle inspection is intended for which purpose? - Answer- to find problems that could
cause a crash or breakdown
For the best control of your vehicle, which maneuver is best? - Answer- slow to a safe
speed before entering a curve, then accelerate slightly through the curve
,Which is true about marking a stalled or wrecked vehicle? - Answer- if a hill or curve
prevents approaching vehicles from seeing your vehicle within 500 feet, the reflective
triangle should be moved back down the road to give adequate warning
Inspections of your vehicle should be done: - Answer- before and after a trip
When driving at the posted speed limit, how far ahead should you look? - Answer- one-
fourth of a mile
You are checking your brakes and suspension system for a pre-trip inspection. Which of
these statements is true? - Answer- brake shoes should not have oil, grease or brake
fluid on them; brake pads should not have brake fluid on them; one missing leaf in the
leaf springs can be dangerous
What is the minimum tread depth requirement for front tires? - Answer- 4/32 inch
Which of these should you not do when you pass a vehicle? - Answer- when passing at
night, turn on your high beam before you start to pass
You may not run which of the following on the front wheels of your vehicle: - Answer- re-
grooved tires, recapped tires, retreaded tires
When you down-shift you should: - Answer- down-shift for a curve before you enter it
The parking or emergency brake on a heavy vehicle can only be held in position by
something that cannot leak away. An example would be: - Answer- spring pressure
A driver's brake may be adversely affected if they have the following substance on
them: - Answer- oil, grease, brake fluid
Which of these could cause a vehicle to skid? - Answer- turning too sharply, not enough
weight on the front axle, over acceleration
Steering wheel play of more than ___________ can make it hard to steer. - Answer-
Ten degrees
Which of the following is not a key part of the suspension system? - Answer- Pitman
arm
Which of the following should be on your bus at all times in case of an emergency? -
Answer- fire extinguisher, spare electrical fuses if needed, warning devices for parked
vehicles
A straight truck or bus air brake system should not leak at a rate of more than
____________ psi per minute with the engine off and the brakes released. - Answer-
two psi per minute
, Which of these statements about drugs is true? - Answer- the use of drugs is a hazard
Which of the following is not an emergency equipment item? - Answer- shackle bracket
What should you do if a low air pressure warning comes on? - Answer- bring the vehicle
to a safe stop
Which of the following statements would tell you a shipment contains hazardous
materials? - Answer- a hazardous material placard on the vehicle, a hazardous material
label on the container, the name of a hazard class on the shipping paper
Which one of the following skills is not required to be demonstrated for safe operation of
a commercial vehicle? - Answer- passenger control
An alcohol evaporator is designed to do what for your brakes? - Answer- to reduce the
chance of ice in air brakes valve in cold weather
You have been forced off the road. How should you safely move back onto the road? -
Answer- if the shoulder is clear, stay on it until your vehicle has come to a stop and
move back onto the pavement when it is safe
Which of these statements about accelerating is true? - Answer- rough acceleration can
cause mechanical damage
Which fires can you use water to put out on? - Answer- tire fires
Air braking takes more time than hydraulic braking because? - Answer- air take more
time to flow through the line than hydraulic fluid
When the drive wheels lose traction and begin to spin, what should you do? - Answer-
remove your foot from the accelerator
You should use your mirrors to check: - Answer- the condition of your tires, where the
rear of your vehicle is when making a turn, traffic gaps when merging
The proper way to hold the steering wheel is: - Answer- firmly with both hands on
opposite sides of the wheel
The brake pedal in an air brake system: - Answer- controls the air pressure used to put
on the brakes
Of the following options, which is true about speed? - Answer- on a wet road, you
should reduce your speed by about one-third; on packed snow, you should reduce your
speed by at least one-half; when the road is slippery, it will take longer to stop and will
be harder to turn without skidding
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