NORTH DAKOTA CDL AIR BRAKES PRACTICE TEST

21. In newer vehicles with air brakes, you put on the parking brake:
placing the transmission in Park.
moving the orange push-pull lever to the right.
using a P-shaped, yellow control knob.
using a diamond-shaped, yellow, push-pull control knob.
22. Hydroplaning is more likely if:
the road is wet.
tire pressure is low.
tire tread is worn.
All of the above.
23. Which of the following can cause brakes to fade or fail?
Brakes out of adjustment
Not relying on the engine braking effect
Excessive use of the service brakes
All of the above.
24. Under a pressurized system, the radiator cap:
should never be hot.
should be removed when the coolant is hot.
should always be cool.
should never be removed until the system has cooled.
25. Stepping on and off the brake pedal several times:
may result in dangerously thin linings.
may cause air leaks.
reduces the air pressure in the tanks.
All of the above.
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