GATE Questions & Answers of Linear and Angular Measurements

What is the Weightage of Linear and Angular Measurements in GATE Exam?

Total 7 Questions have been asked from Linear and Angular Measurements topic of Metrology and Inspection subject in previous GATE papers. Average marks 1.57.

The height (in mm) for a 125 mm sine bar to measure a taper of $ 27^\circ\;32' $ on a flat work piece is _______ (correct to three decimal places).

For the situation shown in the figure below the expression for $ H $ in terms of $ r,R $ and $ D $ is

 

Which one of the following instruments is widely used to check and calibrate geometric features of machine tools during their assembly?

The diameter of a recessed ring was measured by using two spherical balls of diameter d2=60 mm and d1=40 mm as shown in the figure.

The distance H2=35.55 mm and H1=20.55 mm. The diameter (D, in mm) of the ring gauge is _______

A metric thread of pitch 2 mm and thread angle 60° is inspected for its pitch diameter using 3-wire method. The diameter of the best size wire in mm is

A taper hole is inspected using a CMM, with a probe of 2mm diameter. At a height, Z=10mm from the bottom, 5 points are touched and a diameter of circle (not compensated for probe size) is obtained as 20mm. similarly, a 40mm diameter is obtained at a height Z = 40mm. the smaller diameter (in mm) of hole at Z = 0 is

A displacement sensor (a dial indicator) measures the lateral displacement of a mandrel mounted on the taper hole inside a drill spindle. The mandrel axis is an extension of the drill spindle taper hole axis and the protruding portion of the mandrel surface is perfectly cylindrical. Measurements are taken with the sensor placed at two positions P and Q as shown in figure. The readings are recorded as Rx = maximum deflection minus minimum deflection, corresponding to sensor position at X, over one rotation.

If Rp=RQ>0 , which one of the following would be consistent with the observation?