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Driving Test
New Mexico
New Mexico CDL Combination 1
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Q.1
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If you cannot reverse your trailer in a straight path, you should:
Swerve back and forth while backing.
Back toward the driver's side.
Back toward the passenger's side.
Q.2
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Having anti-lock brakes on only one axle:
Will not make a difference in braking.
Will provide increased control in braking.
Will likely cause the air brakes to malfunction.
Q.3
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Which of the following will not help prevent a rig from rolling over?
Keeping the cargo as close to the ground as possible
Driving slowly around turns
Driving on the shoulder of a road
Q.4
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When backing up your tractor while coupling it to a trailer, the trailer brakes should be:
Deactivated.
Locked.
Unlocked.
Q.5
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When coupling, you should:
Make sure to couple the proper glad hands.
Only couple one set of glad hands.
It is best to leave one glad hand loose.
Q.6
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After completing a pre-trip inspection, you should ensure that the:
Service line valve is closed.
Trailer hand brake is applied.
Emergency line valve is open.
Q.7
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If a parked trailer does not have spring brakes, you should keep the trailer from moving by:
Having the vehicle parked against a wall or other vehicle.
Using chock blocks.
Parking on a slight incline.
Q.8
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Trailers with low underneath clearance can present challenges when driving over:
Bridges.
Railroad tracks.
Overpasses.
Q.9
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Combination vehicles need extra space on the road because they:
Drive more slowly than other commercial motor vehicles.
Are heavier than other commercial motor vehicles.
Need more space to turn and stop than other commercial motor vehicles.
Q.10
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When should the trailer hand valve be used?
Only when the trailer is carrying a load
Only to test the trailer’s brakes
Only in inclement weather when the trailer may skid
Q.11
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If the emergency air line loses pressure:
The Anti-Lock Braking System will activate.
The service air line will activate.
The emergency brakes will activate.
Q.12
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If the emergency air line loses pressure:
The service brakes will activate.
The tractor protection valve will close.
The rear trailer will detach from the combination.
Q.13
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In a vehicle equipped with an automatic tractor protection valve, the valve will pop out when air pressure drops to a level between:
20 and 45 psi.
75 and 105 psi.
50 and 65 psi.
Q.14
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Keeping cargo low can:
Prevent a rollover.
Help you drive faster.
Make turns more dangerous.
Q.15
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Look into the back of the fifth wheel:
While testing your air brakes.
If your vehicle begins to skid.
When inspecting a coupling.
Q.16
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A driver should test the tractor protection valve by:
Pulling the yellow, diamond-shaped knob.
Releasing air with the brake pedal.
Unlocking the trailer doors.
Q.17
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Shut-off valves:
Prevent air from escaping air brake systems.
Prevent air from entering air brake systems.
Override vehicles that are out of control.
Q.18
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If an air supply control is in its "emergency" position:
The vehicle will increase speed.
The trailer emergency brakes will be applied.
The air supply to the trailer will increase.
Q.19
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When coupling:
You can assume all vehicles are the same.
Be sure that you are coupling correctly.
Cracks in the mounting are acceptable.
Q.20
Submit
During a trip, the ____ should be open.
Rear service line shut-off valve
Rear supply line shut-off valve
Inner shut-off valves
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