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UPGRADE TO CDL PREMIUM
1.
When going down grades, you should:
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put the transmission in Neutral.
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shift up.
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rely solely on engine braking to reduce your speed.
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downshift to a lower gear.
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2.
Under a pressurized system, the radiator cap:
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should be removed when the coolant is hot.
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should always be cool.
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should never be removed until the system has cooled.
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should never be hot.
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3.
If you are driving a 30-foot vehicle at 55 mph, you should leave at least _____ between you and the vehicle ahead.
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3 seconds
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4 seconds
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2 seconds
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5 seconds
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4.
Parking brakes are:
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not required on commercial vehicles with air brakes.
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not required on trailers.
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not required on buses.
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required on all vehicles.
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5.
The application pressure gauge shows:
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how much pressure the relay valves should send to the trailer brakes.
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how much air pressure you are applying to the brakes.
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how much pressure is in the air tanks.
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All of the above.
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6.
To control your speed on a downgrade, you should:
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fully apply the brakes.
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use engine braking.
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use controlled braking.
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coast in neutral.
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7.
Vehicles with air brake systems take longer to come to a complete stop than vehicles with hydraulic brakes because of:
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brake lag.
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tire pressure.
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reaction distance.
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brake fading.
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8.
With air brake vehicles, you should use the parking brakes:
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only if your vehicle is equipped with ABS.
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whenever you leave the vehicle unattended.
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as little as possible.
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only during the vehicle inspection test.
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9.
If your tires are hot, you should NOT:
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drive until you correct the cause of the overheating.
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stop to let the tires cool down.
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let air out of the tires so the pressure goes back to normal.
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once the tires have cooled down, make another stop to check the tires.
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10.
Vehicles with ABS have ______ ABS malfunction lamps on the instrument panel.
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green
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blue
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yellow
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orange
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