Auto collimator is used to check____________________?
Correct answer: B. Angle
- A. Flatness
- B. Angle
- C. Rotor balancing
- D. Roughness
Explanation
An autocollimator detects very small angular deviations by reflecting a collimated beam from a mirror. It is therefore used to check angles, alignment and small tilts rather than surface roughness or rotor balance.
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