MI CDL COMBINATION PRACTICE TEST
11.
To test the tractor-semitrailer connection for security:
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plug the electrical cord into the trailer and fasten the safety catch.
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pull out the air supply knob.
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check that the trailer is locked onto the tractor by pulling the tractor gently forward while the trailer brakes are still locked.
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12.
The only way to stop a front-wheel skid is to:
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let the vehicle slow down.
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supply more power to the drive wheels.
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countersteer.
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13.
Before driving a vehicle with a dual air brake system, you should allow time for the air compressor to build up a minimum of ____ pressure in both the primary and secondary systems.
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150 psi
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50 psi
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100 psi
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14.
Banked curves:
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can be taken at any speed.
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should always be avoided.
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have a safe "design speed".
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15.
When backing a truck you should:
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look straight ahead.
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get out and walk around the vehicle before you begin to back.
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always rely on your mirrors.
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16.
Which of the following may have reduced the clearances since the heights were posted at bridges and overpasses?
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Rain
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The weight of a cargo
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Repaving of the road
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17.
A bridge formula permits:
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more maximum axle weight for axles that are closer together.
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less maximum axle weight for axles that are far apart.
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less maximum axle weight for axles that are close together.
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18.
When you drive a tractor-trailer combination with ABS, you should:
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brake as you always have.
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pump the brakes.
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apply the trailer hand brake whe braking.
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19.
Combination vehicles _________ than single CMVs.
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are much easier to drive
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are safer in bad weather
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require more driving skill
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20.
Which of the following is true about the trailer hand valve?
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The trailer hand valve works the trailer brakes.
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It should be used only to test the trailer brakes.
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All of the above.
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