KY CDL COMBINATION TEST - PRACTICE TEST
11.
You are inspecting your vehicle during a trip. What should you do?
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Use your senses to check for problems.
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Check critical items such as tires, brakes, and lights.
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Watch gauges for signs of trouble.
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All of the above.
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12.
The service line:
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carries power steering fluid to control the trailer brakes.
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carries air to the parking brake to control the trailer brakes.
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carries air and is connected to relay valves which allow the trailer brakes to be applied more quickly.
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None of the above.
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13.
Which of the following is NOT part of testing the tractor protection valve?
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Charging the trailer air brake system.
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Shutting off the engine.
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Pulling forward slowly, then applying the trailer brakes.
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Stepping on and off the brake pedal several times to reduce the air pressure in the tanks.
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14.
When driving with cargo, you should re-check the cargo and securing devices as often as necessary to keep the load secure, and inspect again:
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every 3 hours or 150 miles.
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every day.
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every 6 hours or 300 miles.
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every 30 minutes or 50 miles.
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15.
Combination vehicles usually require _________ single commercial vehicles.
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the same level of skill as
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less driving skill than
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more driving skill than
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None of the above.
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16.
To prevent rollover, you should:
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drive slowly around corners.
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drive in the left lane.
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turn the engine off while turning.
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drive on the shoulder of the road when possible.
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17.
"Bobtail" tractors are:
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tractors without semitrailers.
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heavily loaded trailers.
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tractors with a tank.
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tractors with two trailers.
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18.
As part of the final air brake check, you should:
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Check air compressor governor cut-in and cut-out pressure.
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Test air leakage rate.
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Test low pressure warning signal.
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All of the above.
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19.
What is the proper following distance for a 50 foot truck traveling at 50 mph?
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5 seconds
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6 seconds
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10 seconds
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25 seconds
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20.
Strong winds can make it difficult to stay in your lane especially when driving:
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flatbed trailers.
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heavier vehicles.
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lighter vehicles.
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vehicles with ABS.
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