Combination #2 - Maine Cdl

1 . 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. Click Here Full Cheat Sheet

2 . 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. Take a FREE Practice Test Now

3 . 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. Take a FREE Practice Test Now

4 . The trailer hand valve should be used:

To test the trailer brakes. To check the connection between the trailer and tractor. To accelerate. Take a FREE Practice Test Now

5 . Shut-off valves:

Prevent air from escaping air brake systems. Prevent air from entering air brake systems. Override vehicles that are out of control. Click Here Full Cheat Sheet

6 . Keeping cargo centered on a rig can:

Help you drive faster. Prevent a rollover. Make turns more dangerous. Take a FREE Practice Test Now

7 . Rollovers happen when:

You drive too slowly. You are stopped. You take a turn too fast. Take a FREE Practice Test Now

8 . Before beginning a trip, you should:

Leave the service line valve open. Remove the relay valves. Close the emergency line valve. Take a FREE Practice Test Now

9 . If a trailer begins to jackknife, the driver:

Should not apply the trailer hand brake. Should firmly apply the brakes. Can straighten the trailer with the parking brake. Click Here Full Cheat Sheet

10 . The service air line is often controlled by the foot brake and is attached to the ____ valves.

Relay Supply Emergency Take a FREE Practice Test Now

11 . During a trip, the ____ should be open.

Rear service line shut-off valve Rear supply line shut-off valve Inner shut-off valves Take a FREE Practice Test Now

Study tip: Reduce your study time from hours to minutes with a DMV exam “Cheat Sheet” 99.2% of people who use the cheat sheet pass the FIRST TIME Click Here Full Cheat Sheet

12 . More than half of all accident-related truck driver deaths are caused by:

Rollovers. Slippery roads. Other drivers. Take a FREE Practice Test Now

13 . If a trailer begins to skid, it is best for the driver to:

Release the brakes. Accelerate. Quickly turn the steering wheel in one direction, then in the other. Click Here Full Cheat Sheet

14 . The "crack-the-whip" effect can:

Turn over a trailer. Be more effective than braking. Make a truck move faster. Take a FREE Practice Test Now

15 . The best way to recognize that your trailer has started to skid is by:

Seeing other drivers' faces. Checking the trailer in your mirrors. Feeling the trailer move. Take a FREE Practice Test Now

16 . 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. Take a FREE Practice Test Now

17 . When backing up your tractor while coupling it to a trailer, the trailer brakes should be:

Deactivated. Locked. Unlocked. Click Here Full Cheat Sheet

18 . A trolley valve:

Should be used while driving. Should only be used to test trailer brakes. Should be used when parking uphill. Take a FREE Practice Test Now

19 . Trailers built before ____ are not required to have spring brakes.

1985 1975 1999 Take a FREE Practice Test Now

20 . 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. Take a FREE Practice Test Now