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Pennsylvania CDL Double Test 1
Practice mode
Question
1
of 20
QUESTION 1 / 20
What is another name for the service line?
Choose one answer below.
A
Control line
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B
Exchange line
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C
Surplus line
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D
Parallel line
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QUESTION 2 / 20
Eating while driving:
Choose one answer below.
A
Is a good way to maximize time.
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B
Is encouraged on long trips.
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C
Creates a distraction for the driver.
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D
Is mandatory so cargo is not left unsupervised.
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QUESTION 3 / 20
Low underneath clearance can cause difficulties when driving:
Choose one answer below.
A
Over railroad crossings.
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B
On gravel roads.
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C
Around corners.
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D
At the posted speed limit.
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QUESTION 4 / 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.
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QUESTION 5 / 20
Cargo inside a trailer:
Choose one answer below.
A
Does not need to be secured.
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B
Should be stacked no more than three feet high.
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C
Should be secured to prevent movement.
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D
Should be loaded with the heaviest items on top of lighter items.
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QUESTION 6 / 20
What happens when the wheels of a trailer lock up?
Choose one answer below.
A
The trailer will usually continue to move in a straight line.
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B
The trailer will disengage.
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C
The trailer will likely swing around.
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D
The trailer will stop.
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QUESTION 7 / 20
A vehicle equipped with an Anti-Lock Braking System (ABS) uses a ____ light to warn that the system is not working properly.
Choose one answer below.
A
Green
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B
Yellow
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C
Orange
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D
White
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QUESTION 8 / 20
When an engine is started:
Choose one answer below.
A
The brakes should be locked up.
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B
Warning lights should come on and then quickly turn off.
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C
The coolant temperature will decrease.
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D
The hood must be open.
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QUESTION 9 / 20
During an applied leakage test, the maximum leakage rate for a triple combination vehicle is:
Choose one answer below.
A
10 psi in a minute.
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B
8 psi in a minute.
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C
6 psi in a minute.
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D
4 psi in a minute.
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QUESTION 10 / 20
Placards should be used:
Choose one answer below.
A
Any time a vehicle is carrying hazardous materials.
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B
If there is open space in the truck.
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C
If the amount of hazardous materials in the truck exceeds 200 pounds.
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D
If the hazardous materials create an inhalation hazard.
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QUESTION 11 / 20
In a set of triples, the shut-off valves at the rear of the middle trailer should be:
Choose one answer below.
A
Removed.
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B
Closed.
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C
Polished.
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D
Open.
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QUESTION 12 / 20
Over-the-counter medication:
Choose one answer below.
A
Poses no safety risks to a driver.
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B
Is not referenced by any laws regarding driving under the influence.
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C
Cannot impair a driver.
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D
Can affect a person’s ability to drive safely.
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QUESTION 13 / 20
Rollovers happen when:
Choose one answer below.
A
A truck driver is driving too fast.
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B
The driver of a vehicle in front of a truck is moving to slowly.
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C
A truck driver is driving too slowly.
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D
ABS is working effectively.
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QUESTION 14 / 20
When uncoupling a dolly, you should:
Choose one answer below.
A
Unlock the pintle hook before moving the dolly out from under the rear trailer.
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B
Move the dolly out from under the rear trailer before unlocking the pintle hook.
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C
Raise the dolly landing gear.
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D
Remove the dolly as quickly as possible.
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QUESTION 15 / 20
Why do you need to drain air tanks regularly?
Choose one answer below.
A
Because the air gets old and needs to be replaced
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B
Because compressed air contains some water which must be drained from the tanks
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C
To allow for a change in air pressure
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D
To remove bad air from the tanks
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QUESTION 16 / 20
What is a tractor protection valve?
Choose one answer below.
A
A valve to keep air in the brake system should there be a bad leak
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B
A valve that prevents the truck from being stolen
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C
A valve that prevents the driver from going too fast
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D
A valve that prevents the trailer from accidentally being released
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QUESTION 17 / 20
Backing with a trailer is dangerous because:
Choose one answer below.
A
It is difficult to see behind the vehicle.
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B
Most trucks do not have the ability to move in reverse.
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C
Cargo may fall out of the trailer.
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D
There may be extra weight in the front of the trailer.
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QUESTION 18 / 20
Which of the following surfaces provides the least amount of traction?
Choose one answer below.
A
Ice that is dry
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B
Ice that is wet
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C
Wet pavement
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D
Dry pavement
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QUESTION 19 / 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 20 / 20
A pre-trip inspection includes ____ basic steps.
Choose one answer below.
A
Two
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B
Four
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C
Seven
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D
Nine
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