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WorksheetsMachining Brake Drums & Rotors
Total questions: 11
Worksheet time: 6mins
Brake drums use ________ for the friction surface area.
cast iron
aluminum
steel
carbon
Technician A says that hard spots in a brake drum should be removed using a carbide-tip machining tool. Technician B says that the drum should be replaced if hard spots are discovered. Which technician is correct?
Tech A
Tech B
Both Tech A and Tech B
Neither Tech A nor Tech B
The major reason for brake pedal pulsation during braking is due to___________.
grooved rotors
excessive rotor thickness variation
thin rotors
poor surface finish on the rotors
After machining a rotor, what should be done?
Installed on the vehicle
Clean the rotor with soap and water
Rub the machined surface with a brake pad to burnish the surface
Use new lug nuts when installing on the vehicle
The brake lathe arbor should be checked using a ________.
feeler gauge
vacuum gauge
thread pitch gauge
dial indicator
Two technicians are discussing hard spots in brake drums. Technician A says the drum should be replaced. Technician B says the hard spots are caused by using riveted rather than bonded brake shoes. Which technician is correct?
Tech A
Tech B
Both Tech A and Tech B
Neither Tech A nor Tech B
Hard spots in a brake drum are caused by ________.
improper mounting of the drum on the lathe
machining a drum at too high a speed
excessive heat and pressure
machining a drum without using a rubber belt to damper out the vibrations
Which is NOT a type of brake drum construction?
Composite
Bimetallic
Centrifugally cast
Solid composite
Which one is not a form of drum distortion?
Eccentric
Lack of parallelism
Out-of-round
Bellmouth
The chamfer on the inside edge of a brake drum usually indicates ________.
machine to diameter
maximum allowable inside diameter
aluminum drum with cast iron inset
bimetallic drums (1/2 cast iron and 1/2 steel)
Technician A says anti-vibration devices only need to be used when resurfacing drums. Technician B says hubless brake rotors require special adapters when mounted on a bench lathe for resurfacing. Which technician is correct?
Tech A
Tech B
Both Tech A and Tech B
Neither Tech A nor Tech B
