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New Jersey 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. Each question has four possible answer choices. Test questions come from the New Jersey Commercial Driver Guide. 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.
You have made error so far
Passing grade —
4 or fewer errors
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1.
Which of the following is not a part of an air brake system?
A service brake system
A parking brake system
An emergency brake system
An axle brake system
2.
When driving on packed snow, you should reduce your speed:
By at least one-half.
By about one-third.
By about one-quarter.
By about one-eighth.
3.
Areas of the road that are shaded:
Usually do not freeze.
Usually do not contain moisture, so they can’t freeze.
Will remain slick after ice on other areas of the road has melted.
Should always be avoided.
4.
If required to complete a vehicle inspection report in writing, the report must be signed:
Every day.
Only if defects have been noted and certified to have been repaired.
Only if the repairs are estimated to cost more than $1,000.
Only if requested to do so by a law enforcement officer.
5.
When merging into traffic while driving a double or triple, a driver should:
Assume there is enough space for the vehicle to merge.
Be sure there is extra space for the vehicle to merge.
Stop suddenly.
Wait to merge until there is no traffic in the lane for at least two miles.
6.
What happens if the air pressure in a system's air tanks falls below 60 psi?
A warning light will come on.
The vehicle will not shift out of gear.
The front lights will flash.
The vehicle should stop.
7.
About how many drinks does it take for a 200-pound person to reach a 0.02 percent blood alcohol concentration (BAC)?
One
Two
Three
Four
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