Solve this multiple-choice question and choose the correct option.

Concept/ApproachLapping uses a soft lap tool charged with fine abrasive slurry to remove minute amounts of material for high accuracy and mirror-like finish. Terminology check (a) Countersinking, (b) Spot-facing, (c) Reaming are distinct hole operations; none are lapping. Final AnswerProducing very fine finish and accuracy by rubbing with a charged lap and abrasive.

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Lapping: recognize the correct description of the process Lapping is a precision finishing operation used for extremely fine surface finish and accuracy. Choose the description that best defines lapping.

Difficulty: Easy

Making a cone-shaped enlargement of a hole end (countersinking).
Smoothing and squaring the surface around a hole (spot facing).
Sizing and finishing a small diameter hole with a multi-edge tool (reaming).
Producing very fine finish and accuracy by rubbing the work with a charged lap and fine abrasive.

Correct Answer: Producing very fine finish and accuracy by rubbing the work with a charged lap and fine abrasive.

Explanation:

Concept/ApproachLapping uses a soft lap tool charged with fine abrasive slurry to remove minute amounts of material for high accuracy and mirror-like finish.

Terminology check

(a) Countersinking, (b) Spot-facing, (c) Reaming are distinct hole operations; none are lapping.

Final AnswerProducing very fine finish and accuracy by rubbing with a charged lap and abrasive.

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Lapping: recognize the correct description of the process Lapping is a precision finishing operation used for extremely fine surface finish and accuracy. Choose the description that best defines lapping.

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