DOUBLES TRIPLES TEST GA - CDL PRACTICE TEST
11.
When driving with more than one trailer, the _______ trailer should be the first one behind the tractor.
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lightest
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heaviest
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longest
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shortest
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12.
If the safety relief valve in the air brake system releases air:
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this will supply more power to the brakes.
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something is wrong.
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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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13.
If you must stop on a one-way or divided highway, place your warning devices:
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10 feet, 50 feet, and 150 feet toward the approaching traffic.
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50 feet, 100 feet, and 150 feet toward the approaching traffic.
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100 feet, 200 feet, and 300 feet toward the approaching traffic.
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10 feet, 100 feet, and 200 feet toward the approaching traffic.
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14.
With an engine fire, you should:
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not shoot foam from the vehicle’s underside.
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turn the engine off as soon as possible.
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open the hood as soon as possible.
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All of the above.
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15.
Because of the "crack-the-whip" effect, doubles and triples:
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are more likely to run out of gas than other combination vehicles.
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are much slower than other combination vehicles.
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are more likely to turn over than other combination vehicles.
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can go much faster than other combination vehicles.
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16.
Retarders:
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help prevent accidents by applying extra braking power to the non-drive wheels.
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apply their
braking power whenever
you push on the accelerator.
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help slow a vehicle and reduce brake wear.
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All of the above.
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17.
On front tires, tread should be at least:
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4/16 inch
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1/16 inch
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2/32 inch
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4/32 inch
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18.
When your vehicle starts to skid, you must take action to:
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use stab braking.
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use controlled braking.
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accelerate and countersteer.
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restore traction to the tires.
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19.
To prevent rollover, you should:
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drive in the left lane.
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drive on the shoulder of the road when possible.
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drive slowly around corners.
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turn the engine off while turning.
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20.
How should you apply the brakes when going down a steep downgrade?
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You should not brake, and only use engine braking to prevent brake failure.
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Apply the brakes when you reach the bottom of the downgrade.
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Apply the brakes as hard as you can without locking the wheels.
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Apply the brakes whenever you reach your safe speed, until your speed has been reduced to 5 mph below your safe speed.
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