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Missouri 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 three possible answer choices. Test questions come from the Missouri 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 —
4 or fewer errors

How do ice cream trucks become hazardous to other drivers?

Ice cream trucks must be kept cold.
Children often run toward an ice cream truck without looking for other traffic.
Ice cream trucks leave trails of water and ice on the roadway.

A truck tractor built after March 1, 1997 must be equipped with:

An Anti-Lock Braking System (ABS).
A flag.
Hydraulic brakes.

If trying to correct a drive-wheel braking skid, the driver should:

Engage the emergency brake.

Parked delivery trucks may be hazardous because:

The trucks are often shiny.
People are often in a hurry when exiting such trucks and may not look for other vehicles.
Packages often fall out of the trucks and into the road.

When driving at night, you should do all of the following, except:

Make sure you are rested.
Make sure your glasses are clean.
Wear sunglasses.

Rust around wheel nuts may mean:

The nuts are too tight.
The nuts are loose.
The tires should be replaced.

A distracted driver:

Usually follows the rules of the road.
Usually has slowed perception.
Is a good person to follow.
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