CDL DOUBLES TRIPLES PRACTICE TEST PENNSYLVANIA
11.
If you become drowsy while driving, you should:
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take a break.
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drink plenty of coffee.
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open the windows to get some fresh air.
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try to fight it.
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12.
Air pressure should build up in a single air system, within about:
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15 minutes.
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10 minutes.
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3 minutes.
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1 minute.
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13.
In a dual air brake system, if one air system is very low on pressure:
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you should pump the brakes to restore pressure.
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either the front or rear brakes will not be operating fully.
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the effect won't be noticeable for the first 50 miles.
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you should drive and brake as you always have.
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14.
To warn drivers behind you when you see you'll need to slow down, you should:
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sound your horn.
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use your headlights.
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turn off your lights.
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flash the brake lights.
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15.
Before operating the vehicle, the driver should:
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review the last vehicle inspection report.
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rely on the last vehicle inspection and skip the pre-trip inspection.
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should not review the vehicle inspection report and immediately try to find any vehicle defects.
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None of the above.
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16.
The posted speed for a curve that may be safe for a straight truck:
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can be ignored when driving a double or triple.
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is likely to be safe for a double or triple.
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is never safe for a double or triple.
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could be too fast for a double or triple.
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17.
If a load is placed on one side of the trailer:
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a rollover is more likely.
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your brakes won't work.
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the steering axle weight will be too light to steer safely.
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making turns may be easier.
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18.
Placards must be at least _____ inches square.
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21.2
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9.84
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5
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12.6
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19.
To prevent rollover, you should:
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turn the engine off while turning.
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drive on the shoulder of the road when possible.
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drive in the left lane.
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drive slowly around corners.
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20.
Which of the following is NOT a reason for hydraulic brake failure?
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Brake fade on long hills
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Stab braking
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Loss of hydraulic pressure
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All of the above.
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