Which technique from given laser inspection techniques is useful for measuring the diameter of hot steel bars?

Mr. Dubey • 52.30K Points
Coach

Q. Which technique from given laser inspection techniques is useful for measuring the diameter of hot steel bars?

(A) laser scanning gauge

(B) frequency laser interferometer

(D) photodiode array imaging

Correct : Option (A)

Explanation:

 the laser scanning gauge technique is very useful to measure the diameter and roundness of hot steel bars under the vibration conditions to an accuracy of 0.025 millimeter over diameters of 5 to 25 millimeter.

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Q. Which technique from given laser inspection techniques is useful for measuring the diameter of hot steel bars?

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