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Which of the following is true for ’Cross strip’ in sigma comparator?

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Which of the following is true for ’Cross strip’ in sigma comparator?

(a) Has two moving members

(b) Cross strip is hinged

(c) Two members are at 45^o to each other

(d) A flexible strip is attached to any one of the members of cross strip

This question was posed to me during an online exam.

My question is taken from Uses of Comparators topic in division Comparators of Engineering Metrology

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The correct answer is (b) Cross strip is hinged

The best I can explain: A hinged cross strip is present in sigma comparator which has a fixed and a moving member. These are connected to by thin flexible strips and right angle to each other. External force is applied on the moving member.

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