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Indiana 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 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.
You have made error so far
Passing grade —
4 or fewer errors

Before a vehicle with dual air brakes is driven, pressure of at least ____ should be built up in both braking systems.

10 psi
25 psi
50 psi
100 psi

When using a turn signal, you should not:

Signal early.
Signal continuously.
Cancel the turn signal after completing the turn.
Allow the turn signal to stay on long after the turn has been completed.

What is the only way to sober up after drinking?

Take a cold shower.
Drink coffee.

Check ____ to ensure that the air in your vehicle's air braking system flows to all tires.

During a trip
Before a trip
After a trip
The night before a trip

If a truck's Anti-Lock Braking System (ABS) is not working:

The truck will not have any brakes.
The truck should be driven only at slow speeds.
The truck will still have brakes.
The truck will lack brakes on its left side.

To check the automatic transmission fluid level in some vehicles, the vehicle:

Should be parked uphill.
Should be parked downhill.
Must be washed.
May have to be left running.

Hydroplaning usually occurs:

When tires are properly inflated.
At speeds under 15 mph.
In areas where water collects on the road.
During the evening.
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