CDL COMBINATION PRACTICE TEST (MS)

11. The front trailer supports are up, and the trailer is resting on the tractor. Make sure:
the electrical and air connections are properly connected between the tractor and the trailer.
there is enough clearance between the rear of the tractor frame and the landing gear.
there is enough clearance between the top of the tractor tires and the nose of the trailer.
All of the above.
12. Inspecting the fifth-wheel does NOT include:
checking that there are no cracks in the frame.
backing until the fifth-wheel just touches the trailer.
making sure that the fifth wheel is in the proper position for coupling.
checking for missing or damaged parts.
13. You should use chocks when parking a trailer without spring brakes because:
it helps prevent brake failure.
it is required by law.
it helps prevent skids.
the brakes will hold only as long as there is air pressure in the trailer air tank.
14. You have uncoupled a trailer and want to inspect the landing gear. The tractor should be positioned:
with the tractor frame under the trailer.
completely clear of the trailer.
with the tractor frame above the trailer.
None of the above.
15. During a walk around inspection of a combination vehicle, drivers should check that:
the locking jaws are around the shank.
all locking pins are present and locked in place.
the glide plate is securely mounted to the trailer frame.
All of the above.
16. ABS helps you:
steer gently and smoothly while you are braking.
stop much faster.
increase your normal braking capability.
avoid wheel lock up and maintain control of your vehicle when you brake.
17. If you will be transporting hazardous materials that require placards, you must:
transport the materials at night only.
ask permission of the local transportation agency.
obtain a special transit permit.
obtain a hazardous materials endorsement.
18. Blocking _______________ to keep it from sliding.
goes from the upper part of the cargo to the floor
is used in the front, back, and/or sides of a piece of cargo
is used only in the back of a piece of cargo
None of the above.
19. Most truck driver deaths in crashes result from:
following too closely.
driving side-by-side with another truck.
truck rollovers.
off-tracking.
20. Glad hands are used to:
connect the service and emergency air lines from the truck or tractor to the trailer.
connect the brakes from the truck or tractor to the trailer.
connect the electrical lines from the truck or tractor to the trailer.
the air compressor is connected to the engine.
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