Question

Which of the following is true for checking the Relative perpendicular motion of the longitudinal and transverse carriage?

(a) The permissible error allowed is 0.005 mm in 2500 mm length.

(b) This is checked using a slip gauges

(c) Precision square of class I or 0 is used

(d) Maximum error in precision error is of ± 10″ in squareness

I had been asked this question by my college director while I was bunking the class.

Question is taken from Calibration of Linear and Angular Measuring Instruments topic in portion Testing and Calibration of Gauges and Dynamic Measurement of Engineering Metrology

Answer 1

The correct choice is (c) Precision square of class I or 0 is used

The explanation is: The permissible error allowed in this case is 0.005 mm in 1100 mm length. This can be done by using a precision square of class I or class 0 accuracy having a maximum error of ± 10″ in squareness.