COMBINATION TEST NEW JERSEY - PRACTICE TEST
11.
During your inspection, you should look into the fifth-wheel gap and check that the _________ are fully closed around the kingpin.
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lug nuts
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locking jaws
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couplings (U-joints)
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mounting bolts
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12.
Which of the following is true about the trailer hand valve?
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It should be used only to test the trailer brakes.
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The trailer hand valve works the trailer brakes.
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If used in driving it could cause the trailer to skid.
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All of the above.
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13.
If the safety relief valve in the air brake system releases air:
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this will supply more power to the drive wheels.
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the valve is fully operational.
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something is wrong.
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this will supply more power to the brakes.
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14.
When the wheels of a trailer lock up:
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the vehicle will gradually come to a complete stop.
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ABS will increase stopping power.
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the trailer will tend to swing around.
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All of the above.
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15.
Dollies with ABS are required to have a malfunction lamp:
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on the left side.
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on the right side.
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on the front.
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on the rear.
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16.
With brake drums, if brakes become too hot:
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the brakes will supply too much power to the drive wheels.
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your ABS will malfunction.
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the brakes may stop working.
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the air compressor will kick on to cool the brakes.
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17.
After starting the engine, oil pressure should rise to a normal level:
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within 6 minutes.
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within 3 miles.
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within seconds.
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within 2 minutes.
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18.
When going down grades, you should:
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put the transmission in Neutral.
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downshift to a lower gear.
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rely solely on engine braking to reduce your speed.
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shift up.
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19.
To test the service brake:
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push the brake pedal firmly while slowly moving backward.
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push the brake pedal firmly while going about 5 mph.
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shift your transmission to a low gear, pump the brake pedal three times, then hold it down for five seconds.
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gently try to pull forward with the trailer parking brake on, then release the brake.
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20.
Tar in the road pavement rising to the road surface in very hot weather:
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does not affect the road surface or driving conditions.
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might get in your engine.
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is very sticky and will slow down your vehicle.
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causes the road to become very slippery.
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