SOUTH CAROLINA DOUBLES TRIPLES PRACTICE CDL TEST
11.
You can determine if your vehicle is equipped with ABS (anti-lock braking system) by:
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checking if your vehicle was manufactured after March 1, 1998.
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checking for a yellow ABS malfunction lamp on the instrument panel.
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looking for wheel speed sensor wires coming from the rear of your brakes.
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All of the above.
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12.
On any upgrade, gravity:
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speed you up.
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doesn't affect your speed.
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slows you down.
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doubles your speed.
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13.
What can cause poor traction?
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Overloading the truck.
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Too little weight on the driving axles.
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Too much weight on the steering axle.
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All of the above.
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14.
You are driving a modern truck with a manual transmission. When going down a hill you should usually:
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shift into neutral and coast.
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use the same gear you would use to go up the hill.
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use a lower gear than would be required to go up the hill.
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downshift after your
speed has already built up.
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15.
ABS:
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helps you stop faster.
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may cause your wheels to lock when you break hard.
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helps you avoid skids caused by over braking.
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improves your visibility at night.
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16.
Before driving a vehicle with a dual air system, allow time for the air compressor to build up a minimum of ____ pressure in both the primary and secondary systems.
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75 psi
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25 psi
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50 psi
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100 psi
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17.
Air tank drains:
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are used to remove water and oil from the air tanks.
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protect the tanks and the rest of the system from too much pressure.
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are used to move air to the brakes.
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should not be used in wet weather.
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18.
Your vehicle should be equipped with all of the following except:
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Warning devices for parked vehicles
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Spare electrical fuses
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Instructions
on how to perform a vehicle inspection test
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Fire extinguisher
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19.
If you have to drive off the road, you should:
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brake as hard as you can to maintain control.
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fully apply the brakes until your speed has dropped to about 20 mph.
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keep one set of wheels on the pavement, if possible.
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leave the road completely.
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20.
If you must drive slowly, how should you alert following drivers?
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Help them out by signaling when it is safe to pass
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Flash your brake lights
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Use your emergency flashers if it is legal
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Turn on your taillights
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