COMBINATION PRACTICE TEST - MS CDL
11.
When driving trucks with trailers, drivers should:
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make quick lane changes.
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avoid making sudden movements with the steering wheel.
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push the brake pedal to the floor when braking.
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decrease their following distance.
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12.
After supplying air to the trailer brake system, you should check the brake system for crossed air lines by:
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shutting the engine off so you can hear the brakes.
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applying and releasing the trailer brakes and listening for the sound of trailer brakes.
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checking the air brake system pressure gauge for signs of major air loss.
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All of the above.
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13.
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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the trailer will tend to swing around.
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ABS will increase stopping power.
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All of the above.
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14.
When you have to back, you should always try to back toward the driver's side. Why?
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You can watch the front of your vehicle by looking out the side window.
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Backing toward the left side is more dangerous.
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You can see better and watch the rear of your vehicle by looking out the side window.
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All of the above.
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15.
Combination vehicles have __ air lines.
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2
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4
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1
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3
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16.
When checking the lights before driving:
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you should check them from inside the vehicle.
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the engine must be running.
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make sure the parking brake is not set.
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you should turn off the engine.
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17.
Your vehicle has hydraulic brakes. When you press the brake pedal while driving and the pedal goes to the floor, remember that:
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the parking brake should never used to slow the vehicle.
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pumping the brake pedal may generate enough hydraulic pressure to stop the vehicle.
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shifting into neutral may help slow the vehicle.
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All of the above.
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18.
When you back under a trailer:
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use lowest reverse gear.
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back the tractor slowly.
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make sure the trailer brakes are locked.
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All of the above.
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19.
Strong winds can make it difficult to stay in your lane, especially when:
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going into tunnels.
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coming out of tunnels.
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driving alongside other vehicles.
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driving at speeds below 40 mph.
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20.
ABS will:
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increase your average speed.
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shorten your stopping distance.
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not give you more control over the vehicle during braking.
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not change your normal braking capability.
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