KS CDL COMBINATION TEST - PRACTICE TEST
11.
The best way to test the trailer service brakes is to:
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accelerate to the maximum possible speed, then apply the trailer brakes fully.
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pull forward quickly, then apply the trailer brakes with your hand control.
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put the handbrake on when there are no vehicles around you.
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None of the above.
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12.
Emergency brakes are:
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not required on buses.
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required on all vehicles.
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not required on commercial vehicles with air brakes.
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not required on doubles.
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13.
ABS will:
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increase your average speed.
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not give you more control over the vehicle during braking.
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not change your normal braking capability.
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shorten your stopping distance.
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14.
What is a tractor jackknife?
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When the rear wheels of a trailer lock up, and the tractor swings around.
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When the wheels of a trailer lock up, and the trailer swings around.
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When a drive-wheel skid lets the trailer push the towing vehicle sideways.
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None of the above.
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15.
To test the tractor-semitrailer connection for security:
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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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go under the trailer and look into the back of the fifth-wheel.
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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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16.
The service line is also called:
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signal line or air line.
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control line or signal line.
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carrier line or control line.
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pressure line or signal line.
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17.
Air brakes:
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are an effective way to stop large and heavy vehicles.
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should be used only when driving on wet roads.
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can improve fuel efficiency.
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are prohibited on larger vehicles.
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18.
Before starting down a hill, you should:
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slow down and shift to a lower gear.
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release the accelerator and shift to Neutral at the same time.
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look for an escape route.
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apply the brakes hard.
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19.
Most heavy trucks with manual transmissions require ____ to change gears.
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double clutching
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single clutching
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triple clutching
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None of the above.
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20.
A trailer jackknife is more likely to happen when the trailer is:
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loaded to its full capacity.
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empty.
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overloaded.
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None of the above.
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