Massachusetts 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 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
When driving in fog, you should:
Use the windshield wipers.
Use low beam headlights.
Use high beam headlights.
Use the air conditioning.
Which of the following is not a good way to reduce crashes when turning right?
Turn slowly.
Keep the tail end close to the curb.
Keep an eye on oncoming traffic.
Allow open space on your right side.
Good drivers consistently look ____ seconds ahead of their vehicles.
Two to three
Five to six
12 to 15
30 to 45
When driving a trailer with ABS, you should:
Not depress the brakes as much as you would when driving a vehicle without ABS.
Use extra braking force to ensure the ABS kicks in.
Brake as you would when driving a vehicle without ABS.
Try to not brakes as often as you would when driving a vehicle without ABS.
Antifreeze helps to keep an engine functioning properly:
But only in cold weather.
But only in hot weather.
Regardless of the weather.
While minimizing the vehicle's fuel use.
Due to the "crack-the-whip" effect:
Doubles and triples are more likely to turn over than other combination vehicles.
A combination vehicle will make a loud noise if driven fast enough.
The tires on a middle trailer will lock up at all stops.
Vehicles following a truck will be able to travel faster than normal.
A low air pressure warning signal should activate:
When tank pressure falls below 120 psi.
When tank pressure falls below 60 psi.
When tank pressure falls below 10 psi.
When tank pressure falls below 5 psi.
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