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Texas 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. Each question has four answer choices. To pass, the applicant must answer at least 16 questions correctly. Test questions come from the Texas Commercial Motor Vehicle Drivers Handbook. 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.
While driving, if it is discovered a vehicle's ABS is not working, the driver should:
Put on their hazard lights.
Downshift.
Brake normally.
Use their parking brake to stop.
2.
When entering traffic, the driver of a double or triple needs to be aware that doubles and triples:
Need more space to merge into traffic than smaller vehicles.
Are exempt from most speed limits.
Are difficult for other drivers to see.
Are not permitted on interstates.
3.
When checking the engine compartment, you should check all of the following, except:
The engine oil level.
The coolant level in the radiator.
The windshield washer fluid level.
The fuel level.
4.
Off-ramps:
Are usually safe for trucks.
Can be dangerous for trucks.
Should not be used by trucks.
Should be used only if following another vehicle.
5.
As part of the vehicle inspection test, a CDL applicant may be asked to:
Check the engine oil level.
Replace a tire.
Remove the alternator belt.
Replace spark plugs.
6.
Hydroplaning:
Only occurs at extremely high speeds.
Can occur at speeds as slow as 30 mph.
Happens most frequently when tire pressure is too high.
Happens most frequently when tires have good tread.
7.
Service brakes should:
Be tested once a month.
Only be tested by a trained mechanic.
Be tested before every trip.
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