CDL DOUBLES PRACTICE TEST WEST VIRGINIA

11. After starting the engine, the ABS light stays on. This means:
the ABS is not working properly.
the ABS is in Neutral.
the ABS is working properly.
the ABS oil level is not adequate.
12. The parking brake:
should be used when driving in bad weather.
should be used when you need to apply the brakes firmly.
should be used whenever you park.
All of the above.
13. When coupling a double or triple, ________ should be attached last.
the middle trailer.
the trailer right behind the cab.
the more heavily loaded trailer.
None of the above.
14. You are driving a vehicle with air brakes when the low air pressure warning light and buzzer come on. You should:
slow down and test your brakes.
activate your hazard lights and drive to the nearest place where you can stop.
apply the brakes as hard as you can.
pull off the road and stop immediately.
15. Emergency lines are often coded with the color ___ to keep from getting them mixed up with the service line.
blue.
white.
red.
yellow.
16. "Bobtail" tractors are:
tractors with a tank.
tractors with two trailers.
heavily loaded trailers.
tractors without semitrailers.
17. When the trailer breaks away or develops a bad leak, the tractor protection valve will close automatically and:
the trailer supply valve will stay open.
the trailer emergency brakes will come on.
the engine will shut down.
the tractor will lose all air pressure.
18. Warnings on low bridges or underpasses:
must be posted.
are often posted, but sometimes they are not.
are always posted.
None of the above.
19. Truck tractors with air brakes built after March 1, 1997, are required to be equipped with:
GPS
anti-lock brakes.
hydraulic brakes.
a rear backup camera.
20. Foundation brakes are used:
only with the right wheels.
at each wheel.
only with the rear wheels.
only with the front wheels.
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