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Four square inches
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Seven square inches
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10 ¾ square inches
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32 square inches
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Indiana CDL Permit Test - Double
(From the 2020 Indiana 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 four possible answer choices. Test questions come from the Indiana 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.
What is the minimum permitted size of a placard?
2.
To confirm that a trailer has ABS, you can:
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Look under the trailer for wheel speed sensors coming from the back of the brakes.
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Look under the hood for the ABS sticker.
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Look at the tires.
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Remove a tire and look for the ABS sensor on the axle.
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3.
Air tank drains:
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Allow rain water to enter the tank.
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Are used to drain water and compressor oil from the air tank.
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Should never be opened.
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Must remain open during transit.
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4.
How does doubling your speed from 20 mph to 40 mph affect your vehicle's braking distance?
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It stays about the same.
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It increases slightly.
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It doubles.
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It quadruples.
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5.
When using road speed to know when to switch gears, you should:
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Learn what speeds each gear is good for and shift up when necessary.
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Watch other vehicles and try to keep pace.
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Watch other trucks and shift when they shift.
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Use the speed limit as a guide.
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6.
Rollovers happen when:
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A truck driver is driving too fast.
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The driver of a vehicle in front of a truck is moving to slowly.
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A truck driver is driving too slowly.
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ABS is working effectively.
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7.
When other vehicles have trouble seeing you at dawn or dusk, you can increase your visibility by:
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Turning on your four-way flashers.
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Honking your horn.
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Turning on your headlights.
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Turning on your windshield wipers.
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