List of top Mechanical Engineering Questions on Metrology and Inspection

Sine bar is specified by:
V-block used in the workshop to check:
Which of the following is the most accurate method to measure the diameter of a cylindrical object?
Least count of a micrometer screw gauge is usually:
IS specifies which of the following total number of grades of tolerances?
A ratchet screw in a micrometer is provided to
For clearance fit the upper limit of the shaft should be
Match List I with List II
LIST I (Hardness Test)LIST II (Type of indenter used)
A. Rockwell hardness testI. Square-based diamond-pyramid
B. Vickers hardness testII. Hard steel ball
C. Brinell hardness testIII. Rhombic-based diamond-pyramid
D. Knoop hardness testIV. Diamond cone

A shaft has diameter $20^{+0.05}_{-0.15}$ mm and a hole diameter $20^{+0.20}_{-0.10}$ mm. When these are assembled, then what is the nature of fit yield?

The surface plate is usually made of grey cast iron because it provides:
The thread characteristics can be measured precisely by the following instrument:
Accurate centering of work mounted in an independent chuck can be determined by using:
Optimum rake angle for the single point cutting tool is generally considered as a function of:
Which of the following cannot be used for angular measurements?
In order to have interference fit, it is essential that the minimum permissible diameter of the shaft should be

An optical flat is used to measure the height difference between a reference slip gauge A and a slip gauge B. Upon viewing via the optical flat using a monochromatic light of wavelength 0.5 \(\mu\)m, 12 fringes were observed over a length of 15 mm of gauge B. If the gauges are placed 45 mm apart, the height difference of the gauges is ............... \(\mu\)m. (Answer in integer) 

A coordinate measuring machine (CMM) is used to determine the distance between Surface SP and Surface SQ of an approximately cuboidal shaped part. Surface SP is declared as the datum as per the engineering drawing used for manufacturing this part. The CMM is used to measure four points P1, P2, P3, P4 on Surface SP, and four points Q1, Q2, Q3, Q4 on Surface SQ as shown. A regression procedure is used to fit the necessary planes. The distance between the two fitted planes is ............... mm. (Answer in integer) 

A part, produced in high volumes, is dimensioned as shown. The machining process making this part is known to be statistically in control based on sampling data. The sampling data shows that D1 follows a normal distribution with a mean of 20 mm and a standard deviation of 0.3 mm, while D2 follows a normal distribution with a mean of 35 mm and a standard deviation of 0.4 mm. An inspection of dimension C is carried out in a sufficiently large number of parts. To be considered under six-sigma process control, the upper limit of dimension C should be ............... mm. (Rounded off to one decimal place)