CDL DOUBLES PRACTICE TEST NEW JERSEY

11. When driving a double or triple:
the more heavily loaded trailer should be directly behind the tractor.
the lighter trailer should be directly behind the tractor.
all trailers should have the same weight.
the more heavily loaded trailer should be in the rear.
12. Excessive use of the service brakes results in overheating. Too much heat can:
make the brakes stop working.
cause the brakes to grab.
cause the brakes to squeak.
cause the brakes apply unevenly.
13. On any upgrade, _________ – the more you will have to use lower gears to climb hills or mountains.
the heavier the load
the steeper the grade
the longer the grade
All of the above.
14. If your vehicle thumps or vibrates heavily, it may be a sign that:
one of the tires has gone flat.
the engine belt is loose.
the brakes have failed.
you need to shift up.
15. The safety valve is usually set to open at:
75 psi.
150 psi.
100 psi.
200 psi.
16. The tractor protection valve:
prevents the trailer from being accidentally released.
keeps your wheels from locking up when you brake hard.
keeps air from going out if the air compressor develops a leak.
keeps air in the brake system should the trailer develop a bad leak.
17. ABS helps you:
decrease your average speed.
decrease your overall stopping distance.
keep the wheels from locking up.
lock your wheels.
18. Before each trip, you must make sure:
the cargo is balanced and secured.
the truck is overloaded.
your cargo obscures your view to the sides.
the cargo has a high center of gravity.
19. You should test the coupling by:
disconnect the safety chains.
pulling against the pin of the second semitrailer.
locking the pintle hook.
applying the parking brakes so the rig will not move.
20. The maximum amount of play in a 20-inch steering wheel is:
5 inches
1/2 inch
1/4 inch
2 inches
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