Combination #2 - Colorado Cdl

1 . If you need to back your trailer but cannot back up in a straight path, you should:

Back toward the passenger's side. Back toward the driver's side. Swerve back and forth while backing. Always turn to your right. Click Here Full Cheat Sheet

2 . To test the trailer service brakes, you should:

Move the vehicle forward slowly and apply the brakes with the brake pedal. Reverse the vehicle slowly and apply the brakes with the hand control. Reverse the vehicle slowly and apply the brakes with the brake pedal. Move the vehicle forward slowly and apply the brakes with the hand control. 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. You are experiencing a trailer jackknife. Wheels have regained traction after a skid. Air pressure is above 45 psi. Take a FREE Practice Test Now

4 . An Anti-Lock Braking System (ABS):

Allows wheels to lock up. Prevents wheels from locking up. Makes it easier to turn a large vehicle. Assists with the operation of brake lights. Take a FREE Practice Test Now

5 . To prevent a rollover, a driver should:

Keep cargo low. Place cargo high. Keep cargo loose. Turn quickly. Click Here Full Cheat Sheet

6 . Before backing your tractor under the trailer, make sure your trailer brakes are:

Disengaged. Locked. Deactivated. Dry. Take a FREE Practice Test Now

7 . Fully-loaded rigs:

Are less likely to roll over than empty rigs. Are more likely to roll over than empty rigs. Are just as likely to roll over as empty rigs. Should not be driven. Take a FREE Practice Test Now

8 . What is a tractor protection valve?

A valve to keep air in the brake system should there be a bad leak A valve that prevents the truck from being stolen A valve that prevents the driver from going too fast A valve that prevents the trailer from accidentally being released Take a FREE Practice Test Now

9 . When traveling more slowly than 40 mph, maintain at least ____ of following distance per every 10 feet of your vehicle.

One second Two seconds Three seconds Four seconds Click Here Full Cheat Sheet

10 . Using the trailer hand brake while experiencing a trailer jackknife will:

Stop the skid. Straighten the trailer. Increase traction. Continue the skid. Take a FREE Practice Test Now

11 . Rollovers happen when drivers:

Turn too quickly. Do not driving fast enough. Pay attention to the road. Drive illegally. 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 . Simply changing lanes can cause:

A “crack-the-whip” effect, resulting in a rollover. A trailer to straighten out. Confusion over which lane the driver is hoping to use. Other drivers to reduce their speed. Take a FREE Practice Test Now

13 . An air supply control lever should be in its "normal" position when you are:

Changing a tire. Applying the trailer emergency brakes. Pulling a trailer. Using your spring brakes. Click Here Full Cheat Sheet

14 . Push in the trailer air supply control to:

Activate the emergency brakes. Deactivate the air brakes. Sound the horn. Supply the trailer with air. Take a FREE Practice Test Now

15 . Trailers with low underneath clearance may be difficult to drive:

On interstate highways. Over railroad crossings. On dirt roads. At the posted speed limit. Take a FREE Practice Test Now

16 . If unsure if a trailer is equipped with ABS, you can:

Check under the trailer for wheel speed sensors coming from the back of the brakes. Try driving on a slippery surface and see if ABS kicks in. Assume it does have ABS. Remove a tire and look for the ABS sensor on the axle. Take a FREE Practice Test Now

17 . Driving a combination vehicle ____ than driving a single vehicle.

Is easier Requires more driving skill Is better for training Is safer in inclement weather Click Here Full Cheat Sheet

18 . After coupling, there should be ____ between the upper and lower fifth wheel.

No space Very little space A lot of space Three inches of space Take a FREE Practice Test Now

19 . A shut-off valve:

Is located on the front of a trailer. Is located on the instrument panel. Prevents air from escaping an air brake system. Should always be open. Take a FREE Practice Test Now

20 . Compared to other commercial motor vehicles, combination vehicles need more space on the road because they are longer and they:

Need more space to turn and stop. Drive more slowly. Are twice the width. Swerve more often. Take a FREE Practice Test Now