WYOMING DOUBLES TRIPLES PRACTICE CDL TEST
11.
If driving a heavy vehicle, you should:
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avoid braking.
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stay in the right lane.
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try to pass other vehicles going uphill.
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stay in the left lane.
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12.
When coupling, you should:
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be aware that wrong coupling and uncoupling can be very dangerous.
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make sure the sliding fifth-wheel is locked.
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make sure the trailer kingpin is bent.
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make sure the trailer wheels are not chocked.
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13.
If you're feeling tired while driving you should:
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eat something.
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stop driving and get some rest.
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increase your speed to get to your destination quicker.
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drink coffee.
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14.
The safety valve installed in the first tank the air compressor pumps air is set to open:
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at 30 psi.
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if there is too much pressure.
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if there is too little pressure.
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every 15 minutes.
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15.
If your vehicle is equipped with air brakes, loss of air pressure in the emergency line will cause:
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the springs to put on the brakes.
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the trailer supply valve to open.
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the vehicle to slide back and forth.
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the trailer emergency brakes to come on.
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16.
When a tire fails, you should:
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apply the brakes as hard as you can without locking the wheels.
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brake in a way that will keep your
vehicle in a straight line.
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push the brake pedal down gradually.
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stay off the brake.
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17.
To make the brakes work, air brakes use:
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carbon monoxide.
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hydraulic air.
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nitrogen.
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compressed air.
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18.
You are driving a heavy vehicle with a manual transmission, and you have to stop on the shoulder while driving on an uphill grade. When putting your vehicle back in motion up the grade, you should:
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keep the clutch slipping while slowly accelerating.
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partly engage the clutch before you take your right foot off the brake.
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shift down to a speed that you can control without using the brakes.
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use the parking brake to hold the vehicle until the clutch engages.
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19.
Empty trucks:
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require a shorter stopping distance than full trucks.
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require the same stopping distance than full trucks.
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require a greater stopping distance than full trucks.
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None of the above.
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20.
If the safety relief valve in the air brake system releases air:
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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 drive wheels.
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this will supply more power to the brakes.
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