COMBINATION PRACTICE TEST - MT CDL
11.
Which of the following makes a rollover more likely?
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Keeping the load centered on your rig
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Driving quickly around turns
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Driving slowly around turns
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Keeping the cargo as close to the ground as possible
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12.
Dollies with ABS are required to have a malfunction lamp:
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on the right side.
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on the rear.
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on the front.
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on the left side.
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13.
Air brakes:
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are an effective way to stop large and heavy vehicles.
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should be used only when driving on wet roads.
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can improve fuel efficiency.
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are prohibited on larger vehicles.
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14.
Inspecting the fifth-wheel does NOT include:
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ensuring the fifth wheel is in the proper position for coupling.
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checking for missing or damaged parts.
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checking the area around the vehicle.
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making sure that the fifth-wheel plate is greased as required.
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15.
The iron trailer supports are up, and the full weight of the trailer is resting on the tractor. Make sure:
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you are in a low enough gear.
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there is enough clearance between the rear of the tractor frame and the landing gear.
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the safety latch is not engaged.
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there is enough clearance between the upper and lower fifth wheel.
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16.
In combination vehicles with air brakes, the trailer air supply control:
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is used to keep the trailer behind the tractor.
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supplies air to the trailer air tanks.
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is a coupling devices used to connect the service and emergency air-lines from the tractor to the trailer.
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is used to control the tractor protection valve.
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17.
If ABS is not working:
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you should use the parking brake.
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you will not have any brakes.
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you should use the emergency brake.
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you will still have brakes.
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18.
After coupling the trailer, begin raising the landing gear by using:
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the electrical cord.
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the high gear range.
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the low gear range.
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the crank handle.
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19.
Before starting down a hill, you should:
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release the accelerator and shift to Neutral at the same time.
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slow down and shift to a lower gear.
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look for an escape route.
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apply the brakes hard.
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20.
Which of the following trailers can get stuck on raised crossings?
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Lowboy
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Moving van
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Car carrier
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All of the above.
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