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Georgia CDL Permit Test - Double

Number of questions: 20
Passing score: 4
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 Georgia Commercial Driver’s 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.
You have made error so far
Passing grade —
16 or fewer errors

One way to avoid jackknifing is to:

Swerve frequently.
Exceed the speed limit.
Look ahead of your vehicle to identify potential hazards.
Drive on the shoulder.

Trailers built before 1975 are:

Required to have spring brakes.
Not required to have spring brakes.
Unsafe to drive.
Prohibited from public roadways.

Simply changing lanes can cause:

A “crack-the-whip” effect, resulting in a rollover.
A trailer to straighten out.
Confusion over which lane the driver is hoping to use.
Other drivers to reduce their speed.

Doubles and triples:

Turn easily due to their centers of gravity.
Are more difficult to turn than smaller commercial vehicles.
Should never be turned.
Always have the right-of-way.

Compared to other commercial motor vehicles, combination vehicles need more space on the road because they are longer and they:

Need more space to turn and stop.
Drive more slowly.
Are twice the width.
Swerve more often.

An air compressor governor will stop the compressor from pumping air once the air tanks have an air pressure level of:

125 psi.
100 psi.
150 psi.
80 psi.

Skids caused by acceleration can usually be resolved by:

Speeding up.
Taking your foot off the accelerator.
Coming to a complete stop.
Switching into a higher gear.
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