SD CDL Practice Test - General Knowledge
11.
Effects of distracted driving include:
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slowed perception.
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failure to perceive an important traffic event.
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delayed decision making.
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All of the above.
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12.
When driving in very hot weather, the heat will increase the chances of:
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tire failure.
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suspension system defects.
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loss of hydraulic pressure.
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ABS malfunction.
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13.
To avoid distractions while driving, you should:
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smoke, eat, and drink only when the road is straight.
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adjust vehicle controls and mirrors prior to driving.
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try to engage in complex conversations with the other occupants.
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use your phone only when there is no traffic around you.
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14.
The Gross Combination Weight (GCW) is:
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the total weight of a single vehicle including its load.
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the weight of the trailer and cargo.
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the weight of the vehicle and its trailer(s).
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the weight of the vehicle, trailer, and cargo.
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15.
When driving past parked vehicles, you should:
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sound your horn.
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watch for clues that the parked vehicle is about to move.
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stay close to the vehicles.
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turn on your taillights.
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16.
What should you do to test your hydraulic brakes for leaks?
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Pump the brake pedal five times, then apply pressure for three seconds.
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Hold the brake pedal down for five seconds, then pump it three times.
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Pump the brake pedal three times, then apply pressure to the pedal and hold for five seconds.
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Pump the brake pedal three times, then apply pressure for 9 seconds.
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17.
Texting while driving a CMV is:
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acceptable if the message less than 140 characters.
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acceptable if the message work-related.
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safer than talking on the phone.
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prohibited.
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18.
The application pressure gauge:
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tells you how much pressure is in the air tanks.
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protects the tank and the rest of the system from too much pressure.
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stops the compressor from pumping air.
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shows how much air pressure is being applied to the brakes.
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19.
Which of the following trailers can get stuck on raised crossings?
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Moving van
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Lowboy
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Car carrier
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All of the above.
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20.
To test the service brakes, pull forward at about _____ and apply the brakes firmly using the brake.
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15 mph
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5 mph
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10 mph
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35 mph
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