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Driving Test
Idaho
Idaho CDL Knowledge Test Class B 1
Answers
Q.1.
If driving on a surface with poor traction, a driver should accelerate slowly:
Because it is always good to accelerate slowly.
To keep from losing control of the vehicle.
So that they do not accelerate faster than the vehicle ahead.
Q.2.
During the vehicle inspection test, you will be asked to:
Change a tire.
Explain to the examiner what you are inspecting and why.
Estimate the weight of a load on a trailer.
Q.3.
During a pre-trip inspection, belts should be:
Loosened.
Checked for tightness.
Scrubbed clean.
Left alone and not inspected.
Q.4.
Do not base your decision to shift gears on:
The speed of your engine (rpm).
The speed of the road (mph).
The actions of the vehicle next to you.
Q.5.
If you must back up, it is helpful to:
Drive as fast as possible to complete the maneuver quickly.
First walk the line of travel to look for obstacles.
Use only the passenger side mirror.
Q.6.
When loading a trailer, it is important to:
Place as little weight as possible over the axles.
Place an appropriate amount of weight over the axles.
Not be concerned with how the cargo's weight is distributed.
Q.7.
During a basic vehicle control skills test, a look is when:
A driver checks the gauges on their instrument panel.
A driver checks their blind spots.
A driver walks to the back of their vehicle to check its position.
Q.8.
When traction is poor, a driver should accelerate especially slowly:
Because it is always good to accelerate slowly.
To keep from losing control of the vehicle.
To keep from accelerating faster than the vehicle ahead.
Q.9.
When approaching a vehicle for a pre-trip inspection, a driver should look under the vehicle:
To see if the vehicle is on an incline.
To see if there are any fresh fluids on the ground.
To see if the vehicle is in a parking spot.
Q.10.
The Individual Vehicle Distance Record (IVDR) does not need to include which of the following?
Trip origin
Vehicle Identification Number
Number of meals eaten by the driver
Q.11.
Air brakes use ____ to function.
Compressed air
Liquid nitrogen
Carbon dioxide
Q.12.
Air tank drains should:
Only be used by mechanics.
Only be used when it is wet outside.
Be used to drain the tanks completely.
Q.13.
An example of required emergency equipment is:
A spare electrical fuse.
A loud horn.
A battery-operated flashlight.
Q.14.
What does blocking cargo do?
Holds the cargo in a large box
Prevents cargo from sliding in transit
Prevent others from buying the cargo
Q.15.
Which of the following determines your blood alcohol concentration (BAC)?
How much you drink
How frequently you drink
The temperature of the drink
Q.16.
Which of the following is not an example of a distracted person who should concern motorists?
A driver talking to a passenger in their vehicle
A person sitting on a bench waiting for a bus
A construction worker on the side of the road
Q.17.
When changing lanes:
You should not use your mirrors.
You should use your mirrors.
You should not use your turn signals.
Q.18.
When leaving your vehicle:
The air brakes should be applied.
The parking brake should be applied.
Brakes should not be applied if the vehicle is left out of gear.
Q.19.
Bridges usually:
Do not freeze.
Have heaters to prevent them from freezing.
Freeze before other surfaces.
Q.20.
Dual tires should:
Always come into contact with one another.
Come into contact with one another fairly regularly.
Not come into contact with one another.
Q.21.
When passing a row of parked vehicles, a driver should:
Stay close to the vehicles.
Watch for signs of a person exiting a vehicle.
Flash their headlights.
Q.22.
As part of the vehicle inspection test, you will be asked to:
Explain why you must check the items you are checking.
Change the coolant.
Replace a headlight.
Q.23.
While still below the legal limit, a driver operating a CMV with a detectable amount of alcohol in their system will:
Result in an out-of-service order for two hours.
Result in an out-of-service order for 10 hours.
Result in an out-of-service order for 24 hours.
Q.24.
A pre-trip inspection should include:
A check of the engine oil level.
Removing coolant.
Washing the tire rims.
Q.25.
Shaded areas of a road:
Usually don’t freeze.
Are usually blocked from all moisture, so they cannot freeze.
Will remain slick after ice has melted on other areas of the road.
Q.26.
When stopping, the brake pedal should be:
Pressed down quickly with both feet.
Pressed down gradually.
Lifted up quickly.
Q.27.
Dry bulk tanks:
Cannot be driven on interstates.
Take special care to be driven.
Are usually not allowed to cross railroad tracks.
Q.28.
If the coolant temperature gauge goes above the highest safe temperature, you should:
Continue to drive.
Pull over and figure out what's wrong.
Run the air conditioner.
Q.29.
When adjusting your mirrors before a trip:
No part of your vehicle should be visible in any mirror.
Part of your vehicle should be visible in the mirrors.
More than half of each mirror should show the vehicle.
Q.30.
When taking the on-road driving skills test:
You do not have to take the test with the type of vehicle for which you want to be licensed.
You must take the test with the type of vehicle for which you want to be licensed.
It does not matter which type of vehicle you use to take the test.
Q.31.
Driving with a cargo of hanging meat in a trailer:
Is discouraged during the summer months.
Can be problematic because animals are attracted to the smell of the meat.
Is challenging because the load has a high center of gravity.
Q.32.
What is removed when an air tank is drained?
Water and oil
Ammonia
Liquid cleaners
Q.33.
Distracted driving:
Is caused only by physical distractions.
Will be increased by pre-programming radio stations.
Can be prevented by avoiding conversation with others.
Q.34.
Rims with welding repairs:
Are not safe to use.
Are acceptable to be used on tires in the rear of the vehicle.
Are acceptable to be used if carrying a light load.
Q.35.
When transporting cargo, drivers must check the securement of the cargo every:
10 miles.
150 miles.
500 miles.
Q.36.
When traveling down a steep downgrade:
The air brakes should be used.
The vehicle should be placed in a low gear and the driver should use engine braking.
The driver should continually downshift instead of using the brakes.
Q.37.
Foundation brakes are used:
Only on the front wheels of a vehicle.
Only on the rear wheels of a vehicle.
On each wheel of a vehicle.
Q.38.
Mirrors should be:
Checked only when changing lanes.
Checked frequently.
Checked only if there is a reason to suspect a problem.
Q.39.
Steering wheel play should be no more than:
10 degrees.
50 degrees.
75 degrees.
Q.40.
Roads are especially slippery right after it begins to rain because:
The water mixes with oil and grease on the road.
Tires are not made to drive in wet weather.
The water yet hasn't absorbed the dirt and grease.
Q.41.
If convicted of a traffic violation in your personal car:
You must tell your employer.
Your CDL will not be affected.
Law enforcement will tell your employer.
Q.42.
A fatigued driver:
Is usually extra alert.
Is usually more conscientious than a typical driver.
May be slower to make critical decisions than a typical driver.
Q.43.
A steering wheel should be:
Held with one hand while the other hand rests.
Held with both hands to ensure an adequate grip.
Released if the vehicle is approaching a bump.
Q.44.
Header boards:
Should never be used.
Protect the driver from being hit by cargo.
Protect the driver's head when entering the cab of a truck.
Q.45.
You may:
Have more than one license if one is for business purposes.
Have more than one license if they are issued by different states.
Not have more than one license.
Q.46.
A ____ allows a driver to gradually apply spring brakes.
Modulating control valve
Trailer air supply control
Relay valve
Q.47.
Which of the following is not an indicator of when to change gears?
Engine speed (rpm)
Road speed (mph)
The speed of the vehicle next to you
Q.48.
Blocking is used to:
Keep cargo in a large box.
Prevent cargo from sliding in a trailer.
Prevent cargo from falling out of a trailer.
Q.49.
If you are confronted with an aggressive driver, you should:
Make eye contact.
Try to stay in their way.
Ignore any hand gestures.
Q.50.
Aggressive driving is:
Operating a vehicle in a selfish or pushy manner.
Operating a vehicle with a strong regard for other motorists’ safety.
Operating a vehicle in the left lane.
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