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Driving Test
District of Columbia
District of Columbia CDL Knowledge Test Class A 2
Answers
Q.1.
Bent lock rings:
Are acceptable.
Are not a concern in dry weather.
Are dangerous.
Can lengthen tire life.
Q.2.
Which of the following is not a sign of bad brake drums or shoes?
Shoes that are not covered in brake fluid
Cracked drums
Pads with oil on them
Shoes worn thin
Q.3.
What is a wig wag?
A type of warning system
A tube used to move air from the compressor to the tanks
A noise made by air brakes when used
A part within the braking unit that allows air to move freely
Q.4.
In bad weather, many drivers:
Like to drive in front of trucks.
Like to be on the side of trucks.
Like to follow trucks.
Like to drive without using their lights.
Q.5.
If you’re not sure how to handle a fire, you should:
Use water.
Stay inside the vehicle.
Wait for the firefighters.
Keep the vehicle running.
Q.6.
What should happen if the air pressure in the braking system's air tanks falls below 60 psi?
The warning light will come on.
The vehicle will not shift out of gear.
The front lights will flash.
The steering wheel will lock up.
Q.7.
On newer vehicles, how do you put on the parking brake?
Move a lever to the right.
Push in the yellow, diamond-shaped knob.
Pull out the yellow, diamond-shaped knob.
Pull up on the steering column.
Q.8.
Which of the following is not a sign of fatigue?
Ability to focus
Daydreaming
Yawning repeatedly
Drifting from your lane
Q.9.
A stopped bus:
Is not a cause for concern.
Is not a concern if passengers are not unloading.
Should not be on the roadway.
Is a concern, whether passengers are visible or not.
Q.10.
Leaking shock absorbers:
Are normal.
Indicate a potentially dangerous defect.
Will prevent the turn signals from working.
Pose no threat if the vehicle is only driven on highways.
Q.11.
While driving, you should:
Develop plans to get out of any dangerous situation that could arise.
Enjoy the scenery.
Never look at the mirrors.
Focus on your own driving and not worry about other drivers.
Q.12.
What is removed when an air tank is drained?
Water and oil
Ammonia
Wood
Chlorine
Q.13.
To make it as safe as possible to leave a stop, you should park:
So that you must back up to leave your parking space.
So that you can pull forward to leave your parking space.
On the side of a roadway, not in a parking lot.
By backing into a parking space.
Q.14.
When trying to avoid a hazard:
Stopping is always effective.
Swerving may be more effective than stopping.
You may change lanes without looking.
You should drive on the shoulder.
Q.15.
What is sleep debt?
When you fall behind on sleep
When you want to take a nap
Excess sleep
The amount of time it takes to get ready to drive after sleeping
Q.16.
A registered vehicle should have:
A mirror on the left side only.
Mirrors on both the left and right sides.
A mirror on the right side only.
Only a rearview mirror.
Q.17.
Laws about securing loads and regulating CMV weights may vary from state to state. During interstate travel:
The law of the state in which the trip originated takes precedence.
The law of the state the vehicle is in takes precedence.
The driver should request federal regulations to override conflicting state laws.
The driver can choose which state’s laws to follow.
Q.18.
Which of the following could reduce the amount of space between the road surface and an overhead object, such as a bridge?
A repaving of the road
Wind
An increased amount of traffic
Rain
Q.19.
Which of the following is not an example of a distracted person that motorists should be worried about?
A driver talking to a passenger in their vehicle
A child on the side of the road
A construction worker on the side of the road
A person sitting on a bench waiting for a bus
Q.20.
Alcohol is removed from the body:
At a rate that changes depending on how much alcohol is in the body.
At a consistent rate, regardless of how much alcohol is in the body.
More quickly if the person drinks coffee.
More quickly if the person stays awake.
Q.21.
You should always be able to stop within:
10 feet of your vehicle.
1,000 feet of your vehicle.
Your view of the road ahead.
A minute of hitting the brakes.
Q.22.
Which of the following is not an example of a distracted person that motorists should be worried about?
A driver talking to another person in a vehicle
Children on the side of the road
Construction workers on the side of the road
A person sitting on a bench waiting for a bus
Q.23.
If you realize you may be running late to your destination, you should:
Drive faster.
Drive while using flashing lights so other road users move out of your path.
Drive at a safe speed and arrive when you arrive.
Get upset.
Q.24.
Before a vehicle with dual air brakes is driven, pressure of at least ____ should be built up in both braking systems.
10 psi
25 psi
50 psi
100 psi
Q.25.
Black ice is:
Usually thick – about half an inch or more of ice.
Usually thin.
Not a hazard when driving.
Not really ice.
Q.26.
Of the following, which is not a way to prevent drowsiness during a trip?
Getting an adequate amount of sleep before driving
Traveling with a passenger
Scheduling trips during hours when you would not normally be awake
Avoiding medications that may cause drowsiness
Q.27.
How should you test the low pressure warning signal?
Engage and disable the parking brake.
Rapidly press and release the brake pedal.
Open the rear shut-off valves.
Uncouple and recouple all glad hands.
Q.28.
Why do you need to drain air tanks regularly?
Because the air gets old and needs to be replaced
Because compressed air contains some water which must be drained from the tanks
To allow for a change in air pressure
To remove bad air from the tanks
Q.29.
How many daily hours of sleep does an adult need to maintain alertness?
Six to seven
Seven to eight
Eight to nine
Four to five
Q.30.
Too little weight on a steering axle can result in:
Poor traction.
Increased visibility.
Longer stopping distances.
Improved gas mileage.
Q.31.
Roads are slippery when it first begins to rain because:
Water is slippery.
The fresh rain mixes with oil on the roadway.
The water has nowhere to go.
Concrete can be slippery.
Q.32.
To use the stab braking method in an emergency situation, you should:
Apply the brakes completely until the wheels lock up, release the brakes until the wheels start rolling, then repeat the process.
Apply the brakes about halfway, but keep the wheels rolling.
Fully apply the brakes, let the wheels lock up, and hold the brake pedal down, keeping the wheels locked until the vehicle stops.
Apply the emergency brake.
Q.33.
Distracted driving:
Is not a concern.
Only happens when drivers are physically doing something, like using a cell phone.
Can occur due to mental activities, such as daydreaming.
Is encouraged on uncrowded roads.
Q.34.
While driving downhill, you should brake until you reach a speed that is ____ below your safe speed, then release the brake pedal.
5 mph
10 mph
15 mph
20 mph
Q.35.
If you are unsure if there is enough space for your vehicle to safely pass under an upcoming bridge, you should:
Increase your speed.
Swerve as you pass under the bridge.
Slow down.
Drive on the shoulder.
Q.36.
Dollies equipped with ABS are required to have malfunction lamps located where?
On the rear
On the left side
On the front
On the top
Q.37.
If you must drive very slowly, you should:
Warn other motorists.
Drive on the shoulder.
Stay in the left lane.
Sound your horn.
Q.38.
When doing an inspection, make sure your brake pads are:
Covered in grease.
Covered in coolant.
Covered in oil.
Free of oil and grease.
Q.39.
When asked to make a lane change during the skills test, you should:
Make the necessary traffic checks first.
Not use your mirrors.
Cut off other vehicles if needed to follow the instructions.
Not make the lane change if you don’t want to.
Q.40.
Once stopped as a part of the stop/start maneuver, you should:
Use the four-way flashers.
Not use the four-way flashers because it is just a test, not an emergency.
Leave the vehicle in first gear.
Park in front of a fire hydrant.
Q.41.
To prevent your tires and engine from overheating while you are driving in especially hot weather, you should:
Increase your speed.
Decrease your speed.
Drive on the shoulder.
Drive with your windows down.
Q.42.
Brakes can get out of adjustment:
If they are hot.
During the winter.
If they are used at all.
If brakes on one side are used more often than brakes on the other side.
Q.43.
Sometimes, when checking the automatic transmission fluid level:
Your vehicle should be parked uphill.
Your vehicle should be parked downhill.
Your vehicle should be washed.
Your vehicle may have to be left running.
Q.44.
When being approached by a vehicle using bright headlights while driving at night, you can avoid being blinded by the headlights by:
Wearing sunglasses.
Closing your eyes.
Glancing to the side of road.
Using your high beams.
Q.45.
During the vehicle inspection test, you will be asked to:
Change a tire.
Explain to the examiner what you would inspect and why.
Estimate the weight of a load in a trailer.
Change a windshield wiper.
Q.46.
When you press the brake pedal in a vehicle with S-cam brakes, air pressure pushes out the rod and moves the:
Slack adjuster.
Axle.
Brake drum.
Alcohol evaporator.
Q.47.
During a vehicle inspection, ensure that lug nuts are all of the following, except:
Free of cracks.
Free of distortions.
Loose.
Free of rust.
Q.48.
Poor weight balance:
Improves a vehicle's handling.
Makes handling a vehicle more difficult.
Increases a driver’s ability to steer.
Makes a vehicle easier to stop.
Q.49.
What is brake lag?
The time required for the brakes to work after the brake pedal is pushed
The distance between the brake pedal’s resting position and the floor
The amount of air pressure used to stop a vehicle
How faded the brakes are
Q.50.
What is a Gross Vehicle Weight Rating?
The maximum weight stated by the manufacturer as the loaded weight of a single vehicle
The maximum weight that can be pulled by a single vehicle
The minimum weight that can be hauled by a single vehicle
The maximum amount that can be loaded onto a single trailer
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