CDL GENERAL KNOWLEDGE TEST (MD) - PRACTICE TEST
41.
Before driving a vehicle with a dual air system, the air compressor should build up a minimum of _____ pressure in both the primary and secondary systems.
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100 psi
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50 psi
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10 psi
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75 psi
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42.
Class A:B:C fire extinguishers are designed to work on:
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burning wood, paper, and cloth.
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electrical fires.
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burning liquids.
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All of the above.
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43.
Commercial motor vehicles:
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are only required to have a fire extinguisher when transporting hazardous materials.
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are not required to have a fire extinguisher if they already have reflective warning triangles and other emergency equipment.
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should have a properly charged and rated fire extinguisher and other emergency equipment.
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None of the above.
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44.
In a vehicle with a dual air brake system:
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both systems typically operate the regular brakes on the rear axle.
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one system supplies air to the trailer.
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each system has its own air tanks.
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All of the above.
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45.
When passing a parked vehicle, which of the following is the only thing you do NOT need to watch out for?
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Wheels starting to turn
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Driver's door opening
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Passenger door opening
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Lights coming on
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46.
Which of the following is checked in a pre-trip inspection?
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Wiper blades
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Steering wheel
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Mirrors and windshield
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All of the above.
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47.
When you are prescribed medications, you should:
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stop taking the medication if you notice it is affecting your driving ability.
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ask your doctor if the drug will affect safe driving ability.
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also take medications that prevent drowsiness to stay alert.
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None of the above.
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48.
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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try to fight it.
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open the windows to get some fresh air.
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49.
Which of these is true about the radiator shutters and the winterfront?
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If the winterfront is left open, the engine may overheat.
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You should remove ice from the radiator shutters.
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You should make sure the winterfront is closed tightly.
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All of the above.
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50.
Which of the following is NOT a warning sign of fatigue?
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Adjust your speed depending on driving conditions
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Difficulty focusing
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Missing exits
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Rubbing eyes
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