JH. Automotive Tech. 7th Edition Chapter 103 Quiz B.

What is the consequence of over-tightened or unevenly tightened lug nuts on a drum?

• Improved braking efficiency

• Eccentric distortion of the drum

• Increased fuel efficiency

• Enhanced wheel alignment

What is the recommended feed rate for a rough cut during rotor machining?

• 0.006–0.010 in. per revolution

• 0.002 in. per revolution

• 0.015 in. per revolution

• 0.030 in. per revolution

What should be removed before removing a brake drum?

• Tinnerman nuts

• Lug nuts

• Wheel

• All of the above

What does a “machine to” specification indicate?

• The measurement to machine the brake drum when machining

• The measurement that requires replacement of the brake drum

• The original manufacturing size of the drum

• The maximum allowable wear limit

What is the correct interpretation of a rotor finish with a higher Ra number?

• Smoother surface

• Rougher surface

• No impact on surface texture

• Indicates the rotor is unusable

What is a symptom of eccentric drums?

• A pulsating brake pedal

• A high-pitched squeal during braking

• A decrease in brake pedal travel

• A clicking noise when turning

What is the result of uneven heat distribution on brake drums?

• Out-of-round distortion

• Increased heat resistance

• Uniform wear patterns

• Decreased braking noise

What is the recommended action if deep rust pockets are found on rotors?

• Machine the rotor

• Fill the pockets with a special compound

• Replace the rotor

• Ignore, as it does not affect braking

What is the purpose of the ballpoint pen test on a rotor?

• To check the ink quality of the pen

• To measure the depth of rotor grooves

• To determine the smoothness of the rotor surface

• To mark the area for machining

What is indicated by a non-solid line when performing the ballpoint pen test?

• The rotor surface is smooth enough

• The rotor surface is not smooth enough

• The rotor has been overheated

• The rotor is new and unused