DSL-204 Chap 35 Servicing Air Brake Air Systems

All of the following are good safety practices to follow during brake system service, EXCEPT:

• Keep hands away from brake chambers and related parts.

• Do not remove a component or pipe plug until all system air pressure has been depleted.

• Use compressed air or dry brushing to clean brake parts or assemblies.

• Wear a disposable face mask.

Which of the following is a step that technicians must follow to prepare the vehicle correctly for brake service activity?

• Support the vehicle using a jack.

• Make sure all battery cables are connected.

• Enable the ATC function on vehicles with automatic traction control.

• Block the wheels with purpose-made wheel chocks.

Technician A says all brake steer issues are caused by the braking system. Technician B says brake pull, also called brake steer, is an unintended left or right direction change by a vehicle during a brake application. Who is correct?

• Technician A only

• Technician B only

• Both Technician A and Technician B

• Neither Technician A nor Technician B

All of the following statements are correct about braking odors, EXCEPT:

• Complaints about smell generally indicate rapid brake wear.

• Smells are typically related to overheated brake lining.

• Having grease on the friction material when the linings overheat can produce complaints.

• Odors are often an indication of a lack of lubrication of the camshafts.

Braking odors are typically related to overheated __________.

• Brake chambers

• Brake drums

• Bushings

• Brake linings

Which of the following defects in the foundation brakes can result in sluggish brake application or release?

• Excessive tank (reservoir) pressure

• One-way check valve

• Damaged, kinked, pinched, or undersized brake hoses and/or lines

• Automatic drain valve

An inoperative low air warning light can be caused by all of the following, EXCEPT:

• Air leakage

• Defective circuit ground

• Defective switch

• Low crankcase pressure

All of the following are the most likely indicators of a problem with the park control valve, EXCEPT:

• Leaks at exhaust port

• Parking brakes won't release

• Sluggish park application

• Parking brakes won't apply

Worn __________ for range control cylinders can leak internally inside a transmission and can be hard to pinpoint.

• Governor air lines

• O-rings

• Gladhand seals

• Air dryer purge valves

What can be used to pinpoint leaks in the air brake system?

• Carpenter's square

• Application of air pressure

• Soapy water

• Cardboard square placed over the compressor's air outlet