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UPGRADE TO CDL PREMIUM
1.
To brake in a way that will keep your vehicle in a straight line and allow you to turn if it becomes necessary, you can use:
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the "controlled braking" method.
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the "controlled braking" method or the "stab braking" method.
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the "stab braking" method.
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None of the above.
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2.
The air storage tanks:
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protects the tank and the rest of the system from too much pressure.
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stop the compressor from pumping air.
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are used to hold compressed air.
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are connected to the engine through gears or a v-belt.
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3.
When the air system is fully-charged, the air loss rate for a single vehicle with the engine off should be less than:
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4 psi in one minute.
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3 psi in one minute.
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2 psi in 30 seconds.
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2 psi in one minute.
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4.
Most heavy-duty vehicles use:
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pump-the-brake systems.
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dual air brake systems.
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single air brake systems.
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triple air brake systems.
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5.
Air tanks usually hold enough compressed air to allow the brakes to be used _________ even if the compressor stops working.
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for 3 days
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for one day
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for one stop
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several times
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6.
Spring brakes are usually held back by:
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the antilock braking system.
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the brake pedal.
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modulating control valves.
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air pressure.
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7.
The tire load rating is stated:
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on each axle.
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inside the suspension system.
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on the dashboard.
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on the side of each tire.
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8.
The supply pressure gauges tell you how much air pressure:
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is going to the brake chambers.
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is in the air brakes.
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you are applying to the brakes.
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is in the air tanks.
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9.
The use of brakes on a steep downgrade is:
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much more effective than the engine braking effect.
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a supplement to the braking effect of the engine.
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the main braking factor.
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dangerous, and should be avoided at all costs.
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10.
The total stopping distance for vehicles with air brake systems is made up of __ different factors.
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3
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2
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4
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5
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