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Pennsylvania CDL Permit Test - Double

Number of questions: 20
Passing score: 16
Directions: This endorsement is required if the driver will pull two or three trailers. To receive this endorsement, applicants must pass a test. The test consists of 20 multiple choice questions. To pass, the applicant must answer at least 16 questions correctly. Test questions come from the Commonwealth of Pennsylvania Commercial Driver’s Manual. Questions come from chapter covering: Doubles and Triples. The Double/Triple endorsement can be used with the Class A CDL.
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Passing grade —
4 or fewer errors
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1.
What is another name for the service line?
Control line
Exchange line
Surplus line
Parallel line
2.
What happens when the wheels of a trailer lock up?
The trailer will usually continue to move in a straight line.
The trailer will disengage.
The trailer will likely swing around.
The trailer will stop.
3.
Cargo inside a trailer:
Does not need to be secured.
Should be stacked no more than three feet high.
Should be secured to prevent movement.
Should be loaded with the heaviest items on top of lighter items.
4.
A vehicle equipped with an Anti-Lock Braking System (ABS) uses a ____ light to warn that the system is not working properly.
Green
Yellow
Orange
White
5.
Push in the trailer air supply control to:
Activate the emergency brakes.
Deactivate the air brakes.
Sound the horn.
Supply the trailer with air.
6.
Eating while driving:
Is a good way to maximize time.
Is encouraged on long trips.
Creates a distraction for the driver.
Is mandatory so cargo is not left unsupervised.
7.
Low underneath clearance can cause difficulties when driving:
Over railroad crossings.
On gravel roads.
Around corners.
At the posted speed limit.
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