Air Brakes #2 - Utah Cdl

1 . The brake pedal is part of which braking system?

The service brake system The parking brake system The emergency brake system The auxiliary brake system Click Here Full Cheat Sheet

2 . If using spring brakes when hauling a heavy load, a complete stop will:

Be impossible. Take a long time. Take a short amount of time. Take a FREE Practice Test Now

3 . Why do you need to drain air tanks regularly?

Because the air gets old and needs to be replaced Because compressed air contains some water which must be drained from the tanks To allow for a change in air pressure To remove bad air from the tanks Take a FREE Practice Test Now

4 . Air tank drains:

Allow rain water to enter the tanks. Are used to drain water and oil from the air tanks. Should never be opened. Must remain open while driving. Take a FREE Practice Test Now

5 . How is water and compressor oil removed from the bottom of an air storage tank?

The water and oil are siphoned out of the tank. A drain valve is opened to remove the water and oil from the tank. The water and oil are removed automatically as the brakes are used. A sponge is used to soak up the water and oil. Click Here Full Cheat Sheet

6 . On a truck with air brakes, the braking system’s air compressor:

Pumps air into the air storage tanks. Fills the tires. Moves air to the back of the truck. Cleans the brakes. Take a FREE Practice Test Now

7 . Some air brake systems use alcohol:

To reduce the risk of ice forming in air brake valves. To make the compressor run more efficiently. To lubricate parts of the braking system. To reduce the risk of rust forming on air brake valves. Take a FREE Practice Test Now

8 . What happens if the air pressure in a system's air tanks falls below 60 psi?

A warning light will come on. The vehicle will not shift out of gear. The front lights will flash. The vehicle should stop. Take a FREE Practice Test Now

9 . If using air tanks with manually operated drains, how often should you drain the tanks?

Every day Once a week Once a month Once every 3,000 miles Click Here Full Cheat Sheet

10 . Truck tractors with air brakes that were built on or after March 1, 1997 are equipped with:

An extra set of brakes. Voice-activated brakes. Cruise control. Anti-Lock Braking Systems (ABS). Take a FREE Practice Test Now

11 . Before driving a vehicle with air brakes, you should ensure that the spring brakes come on automatically when:

Air pressure falls below 45 psi. Air pressure falls below 20 psi. Driving downhill. Driving uphill. Take a FREE Practice Test Now

12 . ABS brakes:

Help you avoid wheel lockup. Lock up your vehicle's wheels. Prevent your vehicle from accelerating when going uphill. Take a FREE Practice Test Now

13 . If the spring brakes are activated, you should never:

Push down the brake pedal. Open the hood. Release air from the air storage tanks. Open the door to the cab. Click Here Full Cheat Sheet

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14 . If the low air pressure warning signal comes on in a vehicle with air brakes, the driver should:

Test the brakes while driving, but continue driving if nothing seems wrong. Immediately stop driving. Drive with the hazard lights activated. Take a FREE Practice Test Now

15 . 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

16 . What kind of force must emergency brakes use?

Air pressure Mechanical Heavy Electrical Take a FREE Practice Test Now

17 . When traveling down a steep downgrade:

The air brakes should be used. Shift into a lower gear, then use brakes to supplement the braking effect of the engine. The vehicle should be continually downshifted in the place of using the brakes. The vehicle should be driven on the shoulder. Click Here Full Cheat Sheet

18 . When using the controlled braking method in an emergency situation, you should:

Apply the brakes as hard as possible without locking the wheels. Apply the brakes with about half of your usual force. Apply the brakes so the wheels lock. Apply the brakes with minimal pressure. Take a FREE Practice Test Now

19 . A safety valve is set to open at ____ pounds per square inch (psi).

100 150 200 Take a FREE Practice Test Now

20 . In a dual air brake system, air pressure should build from 85 to 100 psi within ____ seconds.

25 10 45 Take a FREE Practice Test Now

21 . Manual air tank drains should be:

Opened to drain the tanks after each day. Left open while driving. Sealed with glue. Click Here Full Cheat Sheet

22 . Failing to drain air tanks could result in:

Water accumulations freezing and causing brake failure. Squishy brakes. Too much air collecting in the tanks. Take a FREE Practice Test Now

23 . 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 Take a FREE Practice Test Now

24 . How is the parking brake released?

By tapping the brake pedal three times By pushing in the brake control knob By starting the vehicle By tapping the accelerator twice Take a FREE Practice Test Now

25 . Most heavy-duty vehicles use:

Mono air brake systems. Dual air brake systems. Triple air brake systems. Quadruple air brake systems. Click Here Full Cheat Sheet