AIR BRAKES CDL PRACTICE TEST - VIRGINIA

16. You are driving on a steep downgrade. If your safe speed is 35 mph, you should apply the brakes when your speed reaches:
25 mph
35 mph
30 mph
17. The air tanks should be drained completely to remove:
carbon monoxide.
water and oil.
air.
18. You must take the CDL skills tests in the type of vehicle for which you wish to be licensed. If your test vehicle does not have air brakes:
you will be restricted to driving vehicles without air brakes.
you'll have to immediately retake your test using another vehicle.
you'll need to take another knowledge test about air brakes.
19. On any upgrade, gravity:
doubles your speed.
speed you up.
slows you down.
20. Which of the following is not a type of retarder?
Hydraulic
Pressure
Exhaust
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