Question

What is the permissible error in straight movement of longitudinal and transverse table in horizontal plane?

(a) 0.002 mm

(b) 0.003 mm

(c) 0.004 mm

(d) 0.005 mm

I had been asked this question in homework.

My question is from Calibration of Linear and Angular Measuring Instruments topic in division Testing and Calibration of Gauges and Dynamic Measurement of Engineering Metrology

Answer 1

Correct option is (a) 0.002 mm

The explanation is: The permissible error in straight movement of longitudinal and transverse table is 0.002 mm in horizontal plane and 0.005 mm in vertical plane. This can be checked by using a rectangular straight edge and a dial indicator of least count 0.001 mm with an attachment for fixing dial indicator.