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There is a loss of hydraulic pressure.
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You are driving uphill.
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The brakes get too cold.
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The brakes are used too much in one day.
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Delaware CDL Permit Test - Double
(From the 2020 Delaware CDL driver handbook)
| 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. Each question has three or four possible answer choices. Test questions come from the State of Delaware Commercial Driver License Manual. Questions come from chapters covering: Driving Safely, Air Brakes (if applicable), Combination Vehicles and Doubles and Triples. The Double/Triple endorsement can be used with the Class A CDL.
Passing grade —
4 or fewer errors
advertising
1.
Hydraulic brakes can fail for one of two reasons. Which of the following is one of those reasons?
2.
Maintaining a cushion of space between your vehicle and the vehicle ahead is:
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Not encouraged, as it slows the flow of traffic.
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Encouraged, as it allows you time to react to unexpected hazards.
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Only encouraged if you are traveling with a passenger.
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3.
Rollovers happen when drivers:
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Turn too quickly.
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Do not driving fast enough.
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Pay attention to the road.
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Drive illegally.
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4.
To ensure that you do not slow down traffic when driving a large truck, you should:
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Switch gears while driving uphill.
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Try to pass another vehicle while driving uphill.
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Stay in the right lane whenever possible.
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5.
If you don't pull the dolly out from beneath the rear trailer before unlocking the pintle hook:
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The tow bar may cause injury.
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The landing gear may break.
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The pintle hook may detach.
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Nothing bad could happen.
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6.
When driving, it is important that you:
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Develop plans to get out of potentially dangerous situations.
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Enjoy the scenery.
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Turn your head all the way around rather than use mirrors.
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7.
When driving through fog, a driver should:
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Use high beam headlights.
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Use low beam headlights.
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Run the windshield wipers.
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Drive on the shoulder.
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