Clutches and Brakes

What material properties are desirable for the brake surface in friction brakes?

• Low coefficient of friction and low strength

• High coefficient of friction, high strength, and good thermal properties

• High wear rate and low thermal conductivity

• Low strength and high thermal expansion

What are the two mating friction components in a brake system?

• Rotating load and stationary load

• Rotating load and lining material

• Drum or disc and lining material

• Stationary member and brake shoe

Which of the following is NOT a desirable property of cast iron used in brakes?

• Good thermal conductivity

• Low wear rate

• High thermal expansion

• Required strength

How are brakes categorized?

• By the color of the brake pads

• By the technique used to stop the load and the system used to actuate them

• By the size of the brake drum

• By the material of the brake shoe

What is the primary objective of using friction-producing materials in brakes or clutches?

• To increase the coefficient of friction

• To decrease the coefficient of friction

• To reduce the cost of production

• To enhance the aesthetic appearance

What happens if the coefficient of friction is too high in a brake application?

• The brake application will be overly fierce

• The brake application will be insufficient to stop the load

• The brake will become too weak

• The brake will not be affected

Which material is used to adjust friction and recovery in brakes and clutches?

• Carbon

• Copper

• Nickel

• Rubber

Which of the following is NOT a common binder used in brake or clutch friction surfaces?

• Copper

• Iron

• Nickel

• Plastic

What is often combined in a single unit with a brake in industrial applications?

• Clutch

• Gearbox

• Differential

• Axle

What is the most obvious difference between a plate type brake and a disc brake?

• A plate type brake uses a full disc of friction material, while a disc brake uses only a fraction of the braking path.

• A disc brake uses a full disc of friction material, while a plate type brake uses only a fraction of the braking path.

• A plate type brake uses a drum, while a disc brake uses a shoe.

• A disc brake uses a drum, while a plate type brake uses a shoe.