Combination - Louisiana Cdl

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

Turn over a trailer. Be more effective than braking. Make a truck move faster. Click Here Full Cheat Sheet

2 . The trailer hand valve:

Should always be used for parking. Should only be used for parking on a downgrade. Should never be used for parking. Take a FREE Practice Test Now

3 . When testing ____, you should apply your vehicle's brakes with the hand control while moving the vehicle forward slowly.

The Anti-Lock Braking System The emergency braking system The trailer service brakes Take a FREE Practice Test Now

4 . Older trailers are not equipped with spring brakes. This means that if the air supply for a vehicle's air braking system leaks away:

The trailer will stop normally. The trailer will not have brakes. The trailer will speed up. Take a FREE Practice Test Now

5 . Before a trip, you can make sure air flows to all trailers by:

Checking for moving air inside of each trailer. Listening for air at the rear shut-off valve. Feeling for air at the front shut-off valve. Click Here Full Cheat Sheet

6 . Combination vehicles are usually:

Easier to drive than single commercial vehicles. Lighter than single commercial vehicles. More difficult to drive than single commercial vehicles. Take a FREE Practice Test Now

7 . If a load is placed on one side of a trailer, the trailer:

May lean during turns. May add extra support during turns. May be easier to steer during turns. Take a FREE Practice Test Now

8 . Combination vehicles:

Often have taller trailers than single commercial vehicles. Are usually lighter than single commercial vehicles. Require more skill to drive than single commercial vehicles. Take a FREE Practice Test Now

9 . A tractor protection valve:

Keeps air in a brake system if there is a bad leak. Prevents a truck from being stolen. Prevents a trailer from being accidentally released. Click Here Full Cheat Sheet

10 . If you are backing and the trailer begins to drift off-course, the driver should:

Return the steering wheel to the 12 o’clock position. Turn the top of the steering wheel in the direction of the drift. Turn the top of the steering wheel in the direction opposite of the drift. Take a FREE Practice Test Now

11 . When coupling:

You can assume all vehicles are the same. Be sure that you are coupling correctly. Cracks in the mounting are acceptable. 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 . Pushing in the trailer air supply control will:

Supply the trailer with air. Deactivate the air brakes. Prevent the vehicle from skidding. Take a FREE Practice Test Now

13 . When the wheels of a trailer lock up:

The trailer will be drivable. The trailer may swing around. The vehicle will maintain steering. Click Here Full Cheat Sheet

14 . 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 Take a FREE Practice Test Now

15 . When driving with trailers, you should:

Make quick, sudden changes. Avoid making sudden moves. Accelerate by pushing the accelerator to the floor. Take a FREE Practice Test Now

16 . When braking while pulling a trailer equipped with anti-lock brakes, you should:

Pump the brakes. Use extra braking force to ensure the brakes kick in. Brake as you would without anti-lock brakes. Take a FREE Practice Test Now

17 . When driving a vehicle equipped with an Anti-Lock Braking System (ABS), brakes should be applied:

In the same way as they would be in a vehicle without ABS. As the vehicle is placed in neutral. With the hand brake. Click Here Full Cheat Sheet

18 . 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

19 . When connecting a converter dolly to a second trailer, the trailer height should be ____ the center of the fifth wheel.

Level with Slightly higher than Slightly lower than Take a FREE Practice Test Now

20 . The emergency air line supplies air to the:

Relay valves. Trailer air tanks. Signal line. Take a FREE Practice Test Now