Air Brakes #2 - Alaska Cdl

1 . Emergency brakes:

Are not required on vehicles with air brakes. Are required only on buses. Are required on all vehicles. Click Here Full Cheat Sheet

2 . Brake linings should be:

Loose. Free of oil. Soft. Take a FREE Practice Test Now

3 . In a dual air brake system, if one air system is very low on pressure:

None of the brakes will work at all. Either the front or rear brakes will not be fully operable. There is usually no noticeable effect. Take a FREE Practice Test Now

4 . 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. Take a FREE Practice Test Now

5 . Some water and compressor oil is usually found in the compressed air within an air brake system. The water and compressor oil:

Are necessary for the proper function of the system. Should take up about 10 percent of the tank. Should be removed regularly. Click Here Full Cheat Sheet

6 . What helps prevent wheel lockup when braking?

An Anti-Lock Braking System (ABS) Air brakes An alternator Take a FREE Practice Test Now

7 . A low air pressure warning signal should activate:

When tank pressure falls below 120 psi. When tank pressure falls below 55 psi. When tank pressure falls below 10 psi. When tank pressure falls below 5 psi. Take a FREE Practice Test Now

8 . The parking brake in a newer vehicle is applied by:

Moving a lever to the right. Pushing a yellow, diamond-shaped knob. Pulling a yellow, diamond-shaped knob. Take a FREE Practice Test Now

9 . What can happen if the air pressure gets too low in an air brake system?

The brakes may squeak. The brakes may stop working. The brakes may be sluggish. Click Here Full Cheat Sheet

10 . During an applied leakage test, the maximum leakage rate for a triple combination vehicle is ____ in a minute.

2 psi 4 psi 6 psi Take a FREE Practice Test Now

11 . If the low air pressure warning signal comes on, you should:

Continue driving, but have the brakes repaired within a week. Pull over and inspect the brakes. Phone a mechanic while driving. Take a FREE Practice Test Now

12 . While driving, ____ generally holds spring brakes in place.

Air pressure Electricity Gasoline Take a FREE Practice Test Now

13 . Friction in an S-cam brake is caused when the brake shoes and linings:

Press against the outside of the brake drum. Press against the inside of the brake drum. Push against each other. Click Here Full Cheat Sheet

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14 . Anti-Lock Braking Systems (ABS):

Reduce a vehicle's normal braking capacity. Are in addition to other braking systems and do not reduce a vehicle's braking power. Are not effective on larger vehicles. Take a FREE Practice Test Now

15 . You should ____ if the low pressure warning signal activates while you are driving.

Stop where you are and park Exit the roadway as soon as safely possible Continue driving normally Take a FREE Practice Test Now

16 . What is often found in compressed air?

Water Cardboard Brake fluid Take a FREE Practice Test Now

17 . Using an Anti-Lock Braking System (ABS):

Is required in some states. Shortens brake response time. Provides additional control. Click Here Full Cheat Sheet

18 . A dual air brake system:

Consists of two separate air brake systems that share a single set of controls. Is a single air brake system with two different sets of controls. Consists of one air brake system for the left side of the truck and one system for the right side of the truck, each with its own set of controls. Take a FREE Practice Test Now

19 . When traveling down a steep downgrade:

The air brakes should be used. The vehicle should be placed in a low gear and the driver should use engine braking. The driver should continually downshift instead of using the brakes. Take a FREE Practice Test Now

20 . What should happen before the air pressure in an air brake system tank falls below 55 psi?

The warning light should activate. The vehicle will be unable to shift out of gear. The front lights should flash. Take a FREE Practice Test Now

21 . Once the air tanks are at an air pressure level of 125 psi, the air compressor governor will:

Stop the compressor from pumping air. Release air from the tanks. Begin pumping air into the tanks. Click Here Full Cheat Sheet

22 . The leakage rate for a triple combination vehicle with air brakes should be no more than ____ in one minute during a static leakage test.

8 psi 5 psi 3 psi Take a FREE Practice Test Now

23 . If the safety relief valve in an air brake system is releasing air:

You should not be concerned as this is a normal process. There is something wrong with the brakes. The valve is operational. Take a FREE Practice Test Now

24 . An air compressor governor controls:

When the air compressor pumps air into the air storage tanks. How fast air is pumped into the air storage tanks. The temperature of the air pumped into the air storage tanks. Take a FREE Practice Test Now

25 . An emergency brake must be controlled by:

Mechanical force. Air pressure. Gravity. Click Here Full Cheat Sheet