30) The accuracy of reference gauge is

Answer is:

0.001 mm

Gauges MCQ - Machinist(Set-1) with Answers

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31) One of the precision instruments used to check the dimensional accuracy of an external 'V' thread, is a screw thread micrometer. Which one of the following elements of a screw thread is checked with screw thread micrometer ?

Answer is:

Pitch diameter

One of the precision instruments used to check the dimensional accuracy of an external 'V' thread, is a screw thread micrometer. Which one of the following elements of a screw thread is checked with screw thread micrometer ?

32) Which one of the following grades of slip gauges set is meant for reference purpose ?

Answer is:

Grade 00

Explanation:

Slip gauges are graded according to their accuracy as Grade 0, Grade I and Grade II.
Grade 0 is used in laboratories and standard room which serves as standard for periodically checking the accuracy of Grade I and Grade II gauges.
Grade I is of higher accuracy and used in inspection departments.
Grade II is intended for use in workshops during the actual production of components, tools and gauges.

Which one of the following grades of slip gauges set is meant for reference purpose ?

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