IN CDL COMBINATION PRACTICE TEST

11. If a vehicle is equipped with ABS, when you start the engine:
the trailer emergency brakes will come on.
the spring brakes will come on.
the ABS indicator light on the dash should come on and then turn off.
the wheels will lock up.
12. A vehicle inspection should be done in the same order each time:
because the report must be written in that order.
so you are less likely to forget something.
because it's much quicker.
because it is required by law.
13. Emergency brakes are:
not required on buses.
required on all vehicles.
not required on commercial vehicles with air brakes.
not required on doubles.
14. If your vehicle is equipped with air brakes, loss of air pressure in the emergency line will cause:
the vehicle to slide back and forth.
the trailer supply valve to open.
the springs to put on the brakes.
the trailer emergency brakes to come on.
15. If a trailer does not have spring brakes, to keep the trailer from moving you should:
close the brake valve.
use wheel chocks.
park on a slight decline.
use the service brakes.
16. Do NOT use the parking brakes:
when you leave your vehicle.
when you park for less than two hours.
if the brakes are very hot.
to test that they work.
17. Air brakes use ________ to make the brakes work.
compressed gas cylinders
compressed gases
compressed air
compressed oil
18. When you park trailers without spring brakes, you should use wheel chocks:
to prevent air from escaping.
to keep the trailer from moving.
to prevent overheating.
to prevent the transmission from shifting up.
19. You should test the coupling by:
pulling against the pin of the second semitrailer.
disconnect the safety chains.
locking the pintle hook.
applying the parking brakes so the rig will not move.
20. ABS helps you:
stop much faster.
avoid wheel lock up and maintain control of your vehicle when you brake.
increase your normal braking capability.
steer gently and smoothly while you are braking.
GRADE ME
NOT SURE YOU WILL PASS? GET CDL PREMIUM NOW! - Learn More