AUT105 Week 7 Chapter 47 Drum Brakes

Which of the following is a recommended tool for removing brake lines from a wheel cylinder?

• Flare nut wrench

• Line wrench

• Both A and B

• None of the above

Answer explanation

A line wrench is the recommended tool for removing brake lines from a wheel cylinder. It provides a secure grip and prevents damage to the fittings.

The master cylinder converts the brake pedal force into hydraulic pressure, which is then transmitted_______ via the brake lines and hoses to one or two wheel cylinders at each drum brake assembly.

• With some loss

• Without loss

• With increased force

• None of the above

Answer explanation

The master cylinder converts brake pedal force into hydraulic pressure without loss, which is then transmitted to the wheel cylinders at each drum brake assembly.

All of the following are main components of a drum brake system, EXCEPT:

• brake drum.

• backing plate.

• wheel cylinder.

• caliper assembly.

Answer explanation

The main components of a drum brake system include the brake drum, backing plate, and wheel cylinder. However, the caliper assembly is not a part of a drum brake system. It is used in disc brake systems instead.

Technician A says that when drum brakes are applied, brake shoes are moved outward against a rotating brake drum. Technician B says that drum brakes are used on the rear of many vehicles today. Who is correct?

• Technician A

• Technician B

• Both A and B

• Neither A nor B

Answer explanation

Both A and B are correct. When drum brakes are applied, brake shoes are moved outward against a rotating brake drum. Drum brakes are commonly used on the rear of many vehicles today.

________________ are installed so the direction they are applied is opposite of the forward rotation of the drum.

• Trailing shoes

• Leading shoes

• Stationary shoes

• Slave shoes

Answer explanation

Trailing shoes are installed opposite to the drum's forward rotation.

All of the following components are part of a parking brake system in a drum brake, EXCEPT:

• wheel cylinder

• primary shoe

• secondary shoe

• brake strut rod

Answer explanation

The wheel cylinder is not part of a parking brake system in a drum brake. It is responsible for applying hydraulic pressure to the brake shoes, not the parking brake.

Wheel cylinders are fitted with a ________ to allow for bleeding of air and old brake fluid from the hydraulic brake system.

• Cylinder bore

• Bleeder screw

• Piston seal

• Tension monitor

Answer explanation

The bleeder screw is fitted on wheel cylinders to allow for bleeding of air and old brake fluid from the hydraulic brake system.

Brake shoe lining wear causes the brake pedal to travel farther before activating the brakes, reducing the_________, which leaves the driver vulnerable if a hydraulic failure occurs.

• Brake pedal free play

• Reserve pedal height

• Brake pedal travel

• None of the above

Answer explanation

Brake shoe lining wear increases brake pedal travel, reducing reserve pedal height. This leaves the driver vulnerable if a hydraulic failure occurs.

________ are used to return links and levers on the parking brake system or the self-adjuster mechanism.

• Specialty springs

• Return springs

• Hold-down springs

• None of the above

Answer explanation

Specialty springs are used to return links and levers on the parking brake system or the self-adjuster mechanism. They ensure proper functioning of the brake system.

_________ are not typical components of a wheel cylinder.

• Pistons

• Spring and expander sets

• Lip seals for each piston

• Return springs

Answer explanation

Return springs are not typical components of a wheel cylinder. They are not necessary for the functioning of the cylinder.