NM CDL COMBINATION PRACTICE TEST

11. When coupling a tractor to a semi-trailer, after checking if the fifth-wheel is in proper position for coupling you should:
connect the air lines to the trailer.
make sure the area around the vehicle is clear and the trailer wheels are chocked.
connect the electrical cord and check the air lines.
12. Cargo should be properly covered:
to protect people from spilled cargo.
to protect the weather from the cargo.
to block your view or someone else’s.
13. In a vehicle with a dual air brake system:
each system has its own air tanks.
one system supplies air to the trailer.
both systems typically operate the regular brakes on the rear axle.
14. For a cargo fire in a box trailer, you should:
wait 10 minutes before opening the doors.
open the doors immediately and use the fire extinguisher.
keep the doors shut.
15. When you use your mirrors while driving on the road, you should:
check them quickly.
avoid checking them regularly.
only use the driver's side mirror.
16. During your inspection, you should look into the fifth-wheel gap and check that the _________ are fully closed around the kingpin.
mounting bolts
couplings (U-joints)
locking jaws
17. Passive railroad crossings:
do not have traffic control devices.
should never be crossed using a CMV.
have at least one traffic control device.
18. Which of the following is NOT part of testing the trailer service brakes?
Moving the vehicle forward slowly.
Releasing the parking brakes.
Pushing in the trailer air supply knob.
19. If you must stop on a one-way or divided highway, you should place warning devices _______ toward the approaching traffic.
10, 100 and 200 feet
5, 25 and 50 feet
5, 50 and 500 feet
20. Weight that is loaded so there is a high center of gravity:
reduces the chance that the load will shift to the side or fall off.
makes a vehicle easier to handle.
causes greater chance of rollover.
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