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Texas CDL Double Test 1
Practice mode
Question
1
of 20
QUESTION 1 / 20
When turning quickly to avoid an object in the roadway, you should:
Choose one answer below.
A
Apply your brakes as you steer.
✓
B
Give yourself extra clearance by turning more than needed to miss the object.
✓
C
Turn just enough to miss the object and avoid turning more.
✓
D
Steer and accelerate at the same time.
✓
QUESTION 2 / 20
Most drivers are the least alert:
Choose one answer below.
A
In the morning.
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B
In cold weather.
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C
At night.
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D
After work.
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QUESTION 3 / 20
Before starting down a hill, be sure to:
Choose one answer below.
A
Accelerate.
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B
Switch into a high gear.
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C
Sound your horn.
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D
Switch into a low gear.
✓
QUESTION 4 / 20
What can happen if a parking brake is used in very wet weather when temperatures are below freezing?
Choose one answer below.
A
The brakes will squeak.
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B
The brakes may freeze so the vehicle cannot move.
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C
The brakes may suddenly release by themselves.
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D
The brakes may explode.
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QUESTION 5 / 20
The service air line is attached to the:
Choose one answer below.
A
Relay valves.
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B
Supply line.
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C
Emergency air line.
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D
Steering wheel.
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QUESTION 6 / 20
If you don't pull the dolly out from beneath the rear trailer before unlocking the pintle hook:
Choose one answer below.
A
The tow bar may cause injury.
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B
The landing gear may break.
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C
The pintle hook may detach.
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D
Nothing bad could happen.
✓
QUESTION 7 / 20
When a combination vehicle goes around a corner:
Choose one answer below.
A
The turn should be made as tightly as possible.
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B
The front and rear wheels move in different paths.
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C
The rear wheels should run over the curb.
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D
It is acceptable for street signs to be knocked over if they are too close to the road.
✓
QUESTION 8 / 20
Mirrors should be adjusted:
Choose one answer below.
A
While moving.
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B
When the trailers are straight.
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C
When you are standing next to the vehicle.
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D
By an assistant.
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QUESTION 9 / 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 10 / 20
For safety purposes, when should you turn off a retarder?
Choose one answer below.
A
When the roadways are slippery
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B
When you are carrying a passenger
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C
When you are carrying a heavy load
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D
When driving in heavy traffic
✓
QUESTION 11 / 20
When preparing to drive in the winter, be sure to check:
Choose one answer below.
A
The coolant level.
✓
B
The defrosting and heating equipment.
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C
The windshield wipers.
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D
All of the above.
✓
QUESTION 12 / 20
Bridges usually:
Choose one answer below.
A
Freeze, but only once the temperature drops significantly below 32 degrees Fahrenheit.
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B
Freeze after other road surfaces freeze.
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C
Freeze before other road surfaces.
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D
Have heaters to prevent them from freezing.
✓
QUESTION 13 / 20
When it is difficult for others to see your vehicle, such as at dawn or dusk, you can help other drivers by:
Choose one answer below.
A
Keeping your lights off.
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B
Turning your lights on.
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C
Driving on the shoulder.
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D
Waving an arm out the window.
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QUESTION 14 / 20
Push in the trailer air supply control to:
Choose one answer below.
A
Activate the emergency brakes.
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B
Deactivate the air brakes.
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C
Sound the horn.
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D
Supply the trailer with air.
✓
QUESTION 15 / 20
Improper coupling is:
Choose one answer below.
A
Impossible.
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B
Not a problem.
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C
Not easily detected.
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D
Very dangerous.
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QUESTION 16 / 20
During a static leakage test, the maximum leakage rate for a single vehicle with air brakes is ____ in one minute.
Choose one answer below.
A
1 psi
✓
B
2 psi
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C
3 psi
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D
4 psi
✓
QUESTION 17 / 20
All air tanks must include:
Choose one answer below.
A
A drain valve.
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B
A lock.
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C
A trap door.
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D
A warning sticker.
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QUESTION 18 / 20
When inspecting the trailers in double and triple combinations:
Choose one answer below.
A
A driver should walk around the trailers.
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B
A driver should remain in the cab.
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C
A driver should use their mirrors.
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D
A driver should board each trailer.
✓
QUESTION 19 / 20
If a trailer's spring brakes do not release when you push the tractor air supply control, you should:
Choose one answer below.
A
Check the air line connections.
✓
B
Release the pintle hook.
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C
Replace the spring brakes.
✓
D
Drive normally without checking anything.
✓
QUESTION 20 / 20
When you need to stop in an emergency, you should:
Choose one answer below.
A
Lock the wheels and skid to a stop.
✓
B
Stop in a way that keeps your vehicle in a straight line.
✓
C
Stop in a way that turns your vehicle.
✓
D
Expect your vehicle to slow down more quickly than usual.
✓
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