CDL AIR BRAKES PRACTICE TEST - TEXAS
11.
The tire load rating is stated:
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on the dashboard.
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on each axle.
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inside the suspension system.
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on the side of each tire.
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12.
Supply pressure gauges tell you:
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how much pressure is in the air tanks.
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when the air pressure in the tanks falls below 60 psi.
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how much air pressure you are applying to the brakes.
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when the pressure in the system drops below 60 psi.
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13.
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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checking the air brake system pressure gauge for signs of major air loss.
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applying and releasing the trailer brakes and listening for the sound of trailer brakes.
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All of the above.
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14.
The parking or emergency brakes of trucks or buses must be held on by:
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spring pressure.
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hydraulic pressure.
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fluid pressure.
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air pressure.
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15.
In vehicles with air brakes, the two markings on a front brake limiting valve are:
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high and low.
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wet and dry.
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left and right.
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normal and slippery.
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