GENERAL KNOWLEDGE CDL TEST MASSACHUSETTS - PRACTICE TEST
11.
You should downshift in advance before:
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crossing a bridge.
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starting down a hill or entering a curve.
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entering a tunnel.
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entering the highway.
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12.
You are driving on a steep downgrade in the proper low gear. Your "safe" speed is 40 mph. When your speed reaches 40 mph, you should:
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apply the brakes to gradually reduce your speed to 35 mph, and then release the brakes.
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maintain your current speed, and apply the brakes when you reach 50 mph to gradually reduce your speed to 40 mph.
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apply the brakes to quickly reduce your speed to 25 mph, and then release the brakes.
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increase your speed to approximately 45 mph, and then apply release the brakes.
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13.
On
a tractor-trailer equipped with a trailer brake hand
valve, the hand valve can be used to:
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prevent movement of cargo.
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hold compressed air.
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keep from rolling back.
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reduce the chance of the front wheels skidding.
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14.
Letting air out of hot tires:
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will cool the tires down.
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should not be done, because the pressure will be too low when the tires cool off.
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will help relieve the extra pressure.
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will have no effect on the tires.
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15.
When making a turn, you should turn off your turn signal:
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after you've turned.
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during the turn.
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before entering the turn.
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to keep others from trying to pass you.
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16.
You should not use your horn unnecessarily. Why?
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The horn can startle other drivers, which could be dangerous.
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On vehicles possessing air brakes, it uses up air pressure you may need to be able to stop
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The horn on a vehicle wears out very quickly
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All of the above.
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17.
When you push the brake pedal down, air brakes work:
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only when ABS is working.
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immediately.
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after about 15 seconds.
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after a short delay.
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18.
When only the tractor has ABS:
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the trailer is less likely to swing out.
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there is a greater chance of jackknifing.
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you should be able to maintain steering control during braking.
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the ABS won't work.
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19.
To avoid blinding other drivers, you should dim within ____ of an oncoming vehicle.
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1000 feet
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100 feet
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250 feet
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500 feet
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20.
Confused drivers may:
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change lanes for no apparent reason.
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change direction suddenly.
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stop without warning.
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All of the above.
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