A5 Brakes (ASE Style Questions #2)

A customer complains their vehicle pulls to the right when the brakes are applied. Technician A says a restricted brake line to the left caliper can cause this problem. Technician B says a malfunctioning proportioning valve is probably the cause. Who is right?

• Technician A only

• Technician B only

• Both A and B

• Neither A nor B

With foot pressure applied, the brake pedal on a vehicle with vacuum assisted power brakes moves down slightly when the engine is started. Technician A says this condition can be caused by a leaking power brake booster diaphragm. Technician B says the cause could be a faulty power brake booster check valve. Who is right?

• Technician A only

• Technician B only

• Both A and B

• Neither A nor B

Technician A says the tool shown above is used to adjust the brake shoes. Technician B says the tool shown above is used to determine the inside diameter of the drum. Who is right?

• Technician A only

• Technician B only

• Both A and B

• Neither A nor B

The hydraulic system on a vehicle with integral ABS is to be bled. Technician A says that the front brakes can be bled in a conventional manner. Technician B says that both front and rear brakes can only be bled using the pressure from a fully charged accumulator. Who is right?

• Technician A only

• Technician B only

• Both A and B

• Neither A nor B

A driver complains that the ABS system on his car engages every time he applies the brakes on a cobblestone roadway he uses going back-and-forth to work. This condition means that:

• The system is operating normally

• The wheels are travelling at different speeds

• A wheel speed sensor(s) is faulty

• Both A and B

Two technicians are discussing the duo-servo type drum brake design. Technician A says the brake lining on the secondary shoe is usually longer and thicker than the brake lining on the primary shoe. Technician B says the primary shoe is installed toward the rear of the vehicle. Who is right?

• Technician A only

• Technician B only

• Both A and B

• Neither A nor B

All of the following statements about leading-trailing type drum brakes are true EXCEPT:

• The leading shoe does most of the forward braking

• Both brake shoes are held against a fixed anchor on the backing plate

• They are self-energizing

• The trailing shoe does most of the reverse braking

Technician A says DOT brake fluid has a lower boiling point than DOT 4. Technician B says DOT 4 brake fluid is silicone-based and should never be used in an ABS system. Who is right?

• Technician A only

• Technician B only

• Both A and B

• Neither A nor B

Brakes that drag or fail to release can be caused by which of the following conditions in the master cylinder?

• Leaking primary cup

• Leaking secondary cup

• Failure of the residual pressure check valve

• Clogged compensating port

All of the following could cause a hard brake pedal on a vehicle with power brakes EXCEPT:

• An engine with the valves adjusted too tight

• Brake fluid on the linings

• A leak in the brake hydraulic system

• A frozen caliper