Combination - Maine Cdl

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

Rollovers. Slippery roads. Other drivers. Click Here Full Cheat Sheet

2 . 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. Take a FREE Practice Test Now

3 . 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. Take a FREE Practice Test Now

4 . 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

5 . 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. Click Here Full Cheat Sheet

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

1985 1975 1999 Take a FREE Practice Test Now

9 . Before beginning a trip, you should:

Leave the service line valve open. Remove the relay valves. Close the emergency line valve. Click Here Full Cheat Sheet

10 . 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

11 . 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

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 . 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

13 . 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. 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 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

16 . 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

17 . 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. Click Here Full Cheat Sheet

18 . Shut-off valves:

Prevent air from escaping air brake systems. Prevent air from entering air brake systems. Override vehicles that are out of control. Take a FREE Practice Test Now

19 . Keeping cargo centered on a rig can:

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

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

Deactivated. Locked. Unlocked. Take a FREE Practice Test Now