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Driving Test
District of Columbia
District of Columbia CDL Tank 1
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Q.1
Submit
When approaching a railroad crossing, a driver should:
Rely only on automated signals.
Expect to hear a train.
Cross the tracks before an approaching train reaches the crossing.
Reduce their speed.
Q.2
Submit
In a double or triple combination:
Cargo weight must be evenly distributed between all trailers.
The heaviest trailer should be positioned directly behind the cab.
The heaviest trailer should be positioned in the rear.
The weight of the trailers does not matter.
Q.3
Submit
What does the trailer air supply control look like?
It is a square blue knob.
It is a triangular yellow knob.
It is an eight-sided red knob.
It is a circular orange knob.
Q.4
Submit
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.5
Submit
Simply changing lanes can cause:
A “crack-the-whip” effect, resulting in a rollover.
A trailer to straighten out.
Confusion over which lane the driver is hoping to use.
Other drivers to reduce their speed.
Q.6
Submit
To drive safely, it is important to remember:
How much distance your vehicle needs to stop.
Possible shortcuts along your planned route.
That arriving to your destination on time is the most important thing.
That other drivers will move out of your way when you are merging with traffic.
Q.7
Submit
What is a concern immediately after it begins raining?
The water will mix with grease and oil on the road, making the roadway slippery.
A driver may forget where the windshield wiper lever is located.
It may stop raining.
People will be using their windshield wipers needlessly.
Q.8
Submit
When transporting Division 1.1 materials, the floor liner should be:
Made from metallic materials.
Made from an iron alloy.
Made from non-ferrous materials.
Loose.
Q.9
Submit
If turning to avoid a hazard:
You should brake hard.
You should not brake as it could cause the wheels to lock.
You should turn the wheel very sharply.
You should hold down the brakes until you are past the hazard.
Q.10
Submit
When traveling with Division 1.1, 1.2, or 1.3 explosives, the vehicle should not be:
Parked within 300 feet of a bridge.
Parked within 40 feet of the road.
Parked for only short periods of time.
Parked on grass.
Q.11
Submit
Which of the following is not an example of a driving hazard?
An accident on the roadway
An open road
A police car assisting a motorist on the side of the road
An ice cream truck
Q.12
Submit
When driving a bobtail tractor, you should be aware that:
Bobtails stop very easily.
Bobtails cannot drive as fast as tractors with semitrailers.
Bobtails are more difficult to stop than tractors with semitrailers.
Bobtails are illegal in most states.
Q.13
Submit
A shut-off valve:
Is located on the front of a trailer.
Is located on the instrument panel.
Prevents air from escaping an air brake system.
Should always be open.
Q.14
Submit
While driving:
A driver does not need to inform others of their intentions.
A driver should only use turn signals if a vehicle is next to them.
A driver should not use a turn signal if their lane change will be obvious.
A driver should always use turn signals to inform others of their intentions.
Q.15
Submit
When lightly loaded, combination vehicles:
Should not be driven.
Have reduced braking capabilities.
Will not rollover.
Should be loaded with most of the weight in the rear of the trailer.
Q.16
Submit
When checking your vehicle's lights before driving:
The vehicle should be running and in gear.
The engine should be turned off.
The check can be done from inside the vehicle.
The check can be done by looking at a reflection from a shiny surface.
Q.17
Submit
The minimum tread depth of all major grooves on tires that are not on the front of a CMV should be a minimum of:
1/32 of an inch.
2/32 of an inch.
4/32 of an inch.
3/4 of an inch.
Q.18
Submit
After finishing a pre-trip inspection, you should:
Leave the rear shut-off valves open.
Remove the service line valve.
Close the emergency line valve.
Leave the emergency line valve open.
Q.19
Submit
What should you do if the coolant temperature gauge rises above the highest safe temperature?
Continue to drive.
Pull over and find out what the problem is.
Run the air conditioner.
Turn up the radio.
Q.20
Submit
When backing a trailer, how should you turn the steering wheel?
Turn the top of the steering wheel in the direction you want the trailer to go.
Turn the top of the steering wheel in the direction opposite of where you want the trailer to go.
It doesn’t matter.
It depends on where the trailer is being backed.
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