ASEcertificationtraining.comA5

Front

The pedal is low and spongy; all adjustments have been completed according to specs. The problem could be:

Back

A weak hydraulic hose.

Answer explanation

• A weak hydraulic brake hose could cause a spongy pedal. As the pressure builds in the system, the hose may expand and not relay the pressure to the brake units.

• Binding pedal linkage would cause a hard pedal and perhaps an effective brake system. This is also true for a dented brake line. A plugged compensator port may cause dragging brakes.

Front

A vehicle has no brake pedal free play. This problem may cause _.

Back

pressure build-up and dragging brakes.

Answer explanation

• Without some free play, the brakes may not fully disengage and may cause brake dragging.

Front

When removing the master cylinder, all of the following steps must be performed EXCEPT: Relieve any vacuum boost pressure (if equipped with power brakes). Plug the ends of the brake lines to prevent fluid loss. Disconnect the float level sensor. Drain the master cylinder.

Back

Drain the master cylinder.

Answer explanation

Draining the master cylinder of fluid is not something that must be done. If it is done the fluid is removed only after the lines have been disconnected and capped. Fluid should not run out of the master cylinder while it’s being removed so it is easier to empty the cylinder on a bench. All of the answer choices need to be completed prior to removing the master cylinder.

Front

There are signs of paint removal and peeling on the power brake booster right below the master cylinder. This could be caused by:

Back

A leaking secondary cup on the primary piston.

Answer explanation

• A leaking secondary cup on the primary piston could cause an external leak at the master cylinder. Because brake fluid tends to destroy paint, the peeling paint could be a good indication of a brake fluid leak.

Front

A vehicle pulls to the left during a braking application. The cause of the problem could be: The right rear brake linings are contaminated with grease. The piston is seized in the right front brake caliper. The master cylinder pistons are swollen from contaminated fluid. The secondary compensating port is plugged in the master cylinder.

Back

The piston is seized in the right front brake caliper.

Answer explanation

The direction a vehicle pulls toward during the application of brakes is the side of the vehicle that has less braking power. If something on the right side were causing the brakes to drag or grab, the vehicle would tend to pull to the side with less braking power on the left side.

Front

Brake systems contain all of the following components EXCEPT: double wall copper tubing, high pressure rubber tubing, double wall steel tubing, flare nuts.

Back

double wall copper tubing.

Answer explanation

Copper tubing should never be used in brake systems. Copper corrodes easily and can expand due to high pressures. Therefore, answer A is wrong.

Front

A metering valve delays pressure to which set of brakes under which braking condition?

Back

The front brakes under light braking

Answer explanation

A metering valve is used on systems with front disc and rear drum brakes. During brake application, the fluid pressure must overcome the force of the brake shoe return springs and force the shoes outward.

Front

To test the brake warning light circuit:

Back

Ground the warning switch wire with the ignition on.

Answer explanation

All of the answers are wrong except D. An easy way to check the operation of the brake warning light circuit is to disconnect the wire to the switch and temporarily ground it. If the circuit is fine, the lamp will light when grounded. This is what the switch should do when it is working normally.

Front

During a surge bleeding procedure: Options: The end of the bleeder hose must be kept above the level of the fluid in the container. Pump the pedal quickly several times with the bleeder screw closed. Pump the pedal quickly several times while opening the bleeder screw. Decrease the pressure bleeder chamber pressure to 10 psi (69 kPa)

Back

Pump the pedal quickly several times with the bleeder screw closed.

Answer explanation

In order to move the air that may be trapped in the brake system, pressure must be built up to force the air out when the system is opened. The other answers relate to pressure bleeding, not surge bleeding, or would allow air to enter the system during the bleeding process.

Front

A vehicle experiences brake squeal during the brake application. Technician A says the drums may be distorted. Technician B says the backing plates may be bent. Who is right?

Back

Both A and B

Answer explanation

Both technicians are right. Brake squeal may be caused by bent backing plates, distorted drums, loose linings, improper position of the linings on the shoes, weak or broken hold down springs, or loose wheel bearings.