COMBINATION PRACTICE TEST - NJ CDL
11.
You are driving a combination vehicle and must use your brakes to avoid a crash. You should:
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use stab braking or controlled braking.
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use the parking brake.
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push the brake pedal as hard as you can and hold it there.
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brake lightly and hold the steering wheel firmly.
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12.
A red triangle with an orange center means:
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Liquid tanker
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Slow-moving vehicle
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Law enforcement vehicle
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The vehicle is hauling hazardous materials
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13.
An item that is 15 feet long placed on a flatbed trailer should have at least:
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2 tie-downs.
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1 tie-down.
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3 tie-downs.
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15 tie-downs.
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14.
After supplying air to the trailer brake system, you should check the brake system for crossed air lines by:
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checking the air brake system pressure gauge for signs of major air loss.
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applying and releasing the trailer brakes and listening for the sound of trailer brakes.
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shutting the engine off so you can hear the brakes.
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All of the above.
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15.
Which of the following is NOT a good rule for using turn signals?
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Cancel your signal after you have turned.
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Put your turn signal on after the turn.
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Signal well before you turn.
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Signal continuously until you have completed the turn.
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16.
Before leaving your vehicle unattended, you should:
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Apply the parking brake.
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Chock the wheels.
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Remove the keys.
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All of the above.
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17.
If the spring brakes do not release when you push the trailer air supply control, you should:
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pump the brakes.
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check the electrical cables.
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check the air line connections.
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rev or
lug the engine.
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18.
To avoid rollbacks when you start, you should:
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put on the parking brake whenever necessary.
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if you have manual transmission, partly engage the clutch before you take your right foot off the brake.
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release the parking brake only when you have applied enough engine power.
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All of the above.
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19.
You supply air to the trailer brake system by:
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connecting the tractor service air line to the trailer service glad hand.
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pulling out the trailer air supply valve.
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pushing in the trailer air supply knob.
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plugging the electrical cord into the trailer.
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20.
_________ rigs are much more likely to roll over in an accident than _________ rigs.
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Fully loaded ; empty
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Empty ; fully loaded
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Fully loaded ; overloaded
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Empty ; overloaded
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