Home › Previous year questions › GATE 2020 PI › Question 24GATE 2020 PI – Question 24 Quality and Reliability · Metrology and Inspection · 1 mark · Multiple choice
The ratchet in a micrometer serves to
Move the spindle smoothly Compensate screw-thread wear Prevent spindle rotation during reading Maintain sufficient and uniform measuring pressure Practise this question in The GATE Grind →
Show answer and explanation Correct answer: (D) Maintain sufficient and uniform measuring pressure
Explanation The ratchet slips once the intended contact force is reached, preventing excessive tightening and giving repeatable measuring pressure. Therefore D. A spindle lock addresses holding a setting; backlash and wear compensation are separate mechanisms.
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