Air Brakes - Minnesota Cdl

1 . During a walk-around inspection, ensure there are no cracks on the brake drums that are more than ____ of the width of the friction area.

One half One quarter One third One tenth Click Here Full Cheat Sheet

2 . What does the trailer air supply control look like?

It is a square blue knob. It is a triangular yellow knob. It is an eight-sided red knob. It is a circular orange knob. Take a FREE Practice Test Now

3 . Before driving a vehicle with air brakes, you should ensure that the ____ come on automatically when air pressure falls below 45 psi.

Spring brakes Parking brakes Air brakes 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 . A low air pressure warning signal:

Is not required on vehicles with air brakes. Is required on vehicles with air brakes. Is optional on vehicles with air brakes. Click Here Full Cheat Sheet

6 . Using the brakes creates heat. If too much heat is produced:

The brakes may not work. The brakes may squeak more than usual. The brakes will brake unevenly. Take a FREE Practice Test Now

7 . Where is the safety relief valve usually located?

Near the rear brake Near the front brake In an air tank On the dashboard Take a FREE Practice Test Now

8 . What can happen if a parking brake is used in very wet weather when temperatures are below freezing?

The brakes will squeak. The brakes may freeze so the vehicle cannot move. The brakes may suddenly release by themselves. The brakes may explode. Take a FREE Practice Test Now

9 . If the air pressure warning light comes on, you should:

Continue to drive normally. Drive with one foot on the accelerator and one foot on the brake pedal. Call the local law enforcement agency. Safely exit the roadway and stop. Click Here Full Cheat Sheet

10 . To find out if a vehicle that was built before 1998 has an Anti-Lock Braking System (ABS), you can:

Pump the air brakes to activate the ABS. Look into the back of the fifth wheel. Check for wheel speed sensors coming from the back of the brakes. Take a FREE Practice Test Now

11 . If colors are being used to distinguish glad hands, which color is used for service lines?

Orange Yellow Green Blue Take a FREE Practice Test Now

12 . The most common type of foundation brake used is the:

S-cam drum brake. C-cam drum brake. G-cam disc brake. P-cam disc brake. Take a FREE Practice Test Now

13 . When braking with ABS, you should:

Push the brake pedal harder than usual. Push the brake pedal as you normally would. Push the brake pedal more lightly than usual. Click Here Full Cheat Sheet

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14 . Operating a combination vehicle usually requires ____ operating a single vehicle.

Less skill than About the same level of skill as More skill than Exactly the same level of skill as Take a FREE Practice Test Now

15 . An alcohol evaporator removes alcohol from the air brake system.

True False Take a FREE Practice Test Now

16 . To help prevent rollovers, you should:

Accelerate quickly after stopping. Drive slowly around turns. Keep the load near the back of the trailer. Keep the load on one side of the trailer. Take a FREE Practice Test Now

17 . Making a quick lane change while pulling multiple trailers is usually safer than making a quick lane change while pulling only one trailer.

True False Click Here Full Cheat Sheet

18 . Applying the brake pedal causes air pressure to activate an electric switch and:

Turn off the brake lights. Turn on the low pressure warning light. Turn on the brake lights. Turn off the low pressure warning light. Take a FREE Practice Test Now

19 . The ____ between an air compressor and reservoir tank prevents air from escaping if the air compressor has a leak.

Slack adjuster One-way check valve Tractor protection valve Take a FREE Practice Test Now

20 . In an empty combination vehicle, the stiff suspension springs and strong brakes will have:

High traction. Low traction. No traction. Take a FREE Practice Test Now

21 . Service brakes should:

Be tested once a month. Only be tested by a trained mechanic. Be tested before every trip. Click Here Full Cheat Sheet

22 . To ensure normal stopping power, drivers of vehicles equipped with a front brake limiting valve should:

Set the control to normal. Set the control to the off position. Set the control to neutral. Keep the control at the halfway mark. Take a FREE Practice Test Now

23 . ABS usually shortens a vehicle's stopping distance.