COMBINATION PRACTICE TEST - FL CDL
11.
Hanging meat in a refrigerated truck can be:
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a very unstable load with a high center of gravity.
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a very unstable load with a low center of gravity.
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a very stable load with a low center of gravity.
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a very stable load if properly distributed.
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12.
When uncoupling, after you unlock the fifth-wheel you should:
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chock the trailer wheels.
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pull the tractor clear of the trailer.
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ease the pressure on the locking jaws.
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pull the tractor partially clear of the trailer.
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13.
If loose or missing, _______ may cause movement between the frame and fifth wheel assembly.
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electric connectors
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safety chains
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locking pins
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mounting bolts
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14.
Overloading a vehicle with cargo can have negative effects on all of the following except:
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Speed control
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Steering
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Weight limits
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Braking
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15.
You are coupling a semi-trailer to your tractor but have not yet backed under. The trailer is at the right height when:
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the end of the kingpin is even with the top of the fifth wheel.
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the locking jaws are around the head of the kingpin.
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it will be raised slightly when the tractor is backed under it.
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None of the above.
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16.
The emergency air line:
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causes the tractor protection valve to close when the emergency line loses pressure.
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supplies air to the trailer air tanks.
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controls the emergency brakes on combination vehicles.
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All of the above.
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17.
A bridge formula permits:
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less maximum axle weight for axles that are far apart.
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less maximum axle weight for axles that are close together.
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more maximum axle weight for axles that are far apart.
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more maximum axle weight for axles that are closer together.
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18.
If you are feeling sleepy, you should:
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increase your speed to get to the destination quicker.
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pull off the road and rest or take a nap.
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slow down and drive on the shoulder of the road.
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None of the above.
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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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apply the brakes hard.
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look for an escape route.
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20.
If you have a manual transmission, when stopping don't _______ until the engine rpm is down close to idle.
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place the transmission in park
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apply the brakes
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push the clutch in
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shift to second gear
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