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District Of Columbia CDL Tank Test 1
Practice mode
Question
1
of 20
QUESTION 1 / 20
When approaching a railroad crossing, a driver should:
Choose one answer below.
A
Rely only on automated signals.
✓
B
Expect to hear a train.
✓
C
Cross the tracks before an approaching train reaches the crossing.
✓
D
Reduce their speed.
✓
QUESTION 2 / 20
In a double or triple combination:
Choose one answer below.
A
Cargo weight must be evenly distributed between all trailers.
✓
B
The heaviest trailer should be positioned directly behind the cab.
✓
C
The heaviest trailer should be positioned in the rear.
✓
D
The weight of the trailers does not matter.
✓
QUESTION 3 / 20
What does the trailer air supply control look like?
Choose one answer below.
A
It is a square blue knob.
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B
It is a triangular yellow knob.
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C
It is an eight-sided red knob.
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D
It is a circular orange knob.
✓
QUESTION 4 / 20
Leaking shock absorbers:
Choose one answer below.
A
Are normal.
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B
Indicate a potentially dangerous defect.
✓
C
Will prevent the turn signals from working.
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D
Pose no threat if the vehicle is only driven on highways.
✓
QUESTION 5 / 20
Simply changing lanes can cause:
Choose one answer below.
A
A “crack-the-whip” effect, resulting in a rollover.
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B
A trailer to straighten out.
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C
Confusion over which lane the driver is hoping to use.
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D
Other drivers to reduce their speed.
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QUESTION 6 / 20
To drive safely, it is important to remember:
Choose one answer below.
A
How much distance your vehicle needs to stop.
✓
B
Possible shortcuts along your planned route.
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C
That arriving to your destination on time is the most important thing.
✓
D
That other drivers will move out of your way when you are merging with traffic.
✓
QUESTION 7 / 20
What is a concern immediately after it begins raining?
Choose one answer below.
A
The water will mix with grease and oil on the road, making the roadway slippery.
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B
A driver may forget where the windshield wiper lever is located.
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C
It may stop raining.
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D
People will be using their windshield wipers needlessly.
✓
QUESTION 8 / 20
When transporting Division 1.1 materials, the floor liner should be:
Choose one answer below.
A
Made from metallic materials.
✓
B
Made from an iron alloy.
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C
Made from non-ferrous materials.
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D
Loose.
✓
QUESTION 9 / 20
If turning to avoid a hazard:
Choose one answer below.
A
You should brake hard.
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B
You should not brake as it could cause the wheels to lock.
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C
You should turn the wheel very sharply.
✓
D
You should hold down the brakes until you are past the hazard.
✓
QUESTION 10 / 20
When traveling with Division 1.1, 1.2, or 1.3 explosives, the vehicle should not be:
Choose one answer below.
A
Parked within 300 feet of a bridge.
✓
B
Parked within 40 feet of the road.
✓
C
Parked for only short periods of time.
✓
D
Parked on grass.
✓
QUESTION 11 / 20
Which of the following is not an example of a driving hazard?
Choose one answer below.
A
An accident on the roadway
✓
B
An open road
✓
C
A police car assisting a motorist on the side of the road
✓
D
An ice cream truck
✓
QUESTION 12 / 20
When driving a bobtail tractor, you should be aware that:
Choose one answer below.
A
Bobtails stop very easily.
✓
B
Bobtails cannot drive as fast as tractors with semitrailers.
✓
C
Bobtails are more difficult to stop than tractors with semitrailers.
✓
D
Bobtails are illegal in most states.
✓
QUESTION 13 / 20
A shut-off valve:
Choose one answer below.
A
Is located on the front of a trailer.
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B
Is located on the instrument panel.
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C
Prevents air from escaping an air brake system.
✓
D
Should always be open.
✓
QUESTION 14 / 20
While driving:
Choose one answer below.
A
A driver does not need to inform others of their intentions.
✓
B
A driver should only use turn signals if a vehicle is next to them.
✓
C
A driver should not use a turn signal if their lane change will be obvious.
✓
D
A driver should always use turn signals to inform others of their intentions.
✓
QUESTION 15 / 20
When lightly loaded, combination vehicles:
Choose one answer below.
A
Should not be driven.
✓
B
Have reduced braking capabilities.
✓
C
Will not rollover.
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D
Should be loaded with most of the weight in the rear of the trailer.
✓
QUESTION 16 / 20
When checking your vehicle's lights before driving:
Choose one answer below.
A
The vehicle should be running and in gear.
✓
B
The engine should be turned off.
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C
The check can be done from inside the vehicle.
✓
D
The check can be done by looking at a reflection from a shiny surface.
✓
QUESTION 17 / 20
The minimum tread depth of all major grooves on tires that are not on the front of a CMV should be a minimum of:
Choose one answer below.
A
1/32 of an inch.
✓
B
2/32 of an inch.
✓
C
4/32 of an inch.
✓
D
3/4 of an inch.
✓
QUESTION 18 / 20
After finishing a pre-trip inspection, you should:
Choose one answer below.
A
Leave the rear shut-off valves open.
✓
B
Remove the service line valve.
✓
C
Close the emergency line valve.
✓
D
Leave the emergency line valve open.
✓
QUESTION 19 / 20
What should you do if the coolant temperature gauge rises above the highest safe temperature?
Choose one answer below.
A
Continue to drive.
✓
B
Pull over and find out what the problem is.
✓
C
Run the air conditioner.
✓
D
Turn up the radio.
✓
QUESTION 20 / 20
When backing a trailer, how should you turn the steering wheel?
Choose one answer below.
A
Turn the top of the steering wheel in the direction you want the trailer to go.
✓
B
Turn the top of the steering wheel in the direction opposite of where you want the trailer to go.
✓
C
It doesn’t matter.
✓
D
It depends on where the trailer is being backed.
✓
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