Related Questions

A diamond locating pin is used in jigs and fixtures because
A Diamond is very hard and wear resistant
B It occupies very little space
C It helps in assembly with tolerance on centre distance
D It has a long life
The purpose of jigs and fixtures is to
A Increase machining accuracy
B Facilitate interchangeability
C Decrease expenditure on quality control
D All of these
A plate with an elliptical hole in the centre, with semi-major axis (a) perpendicular to the direction of loading and semi-minor axis (b) along the direction of loading, is subjected to a pull P. The maximum stress induced at the edge of the hole is equal to (where $$\sigma $$ = Stress for a plate with no hole i.e. nominal stress)
A $$\sigma \left( {1 + \frac{{\text{b}}}{{2{\text{a}}}}} \right)$$
B $$\sigma \left( {1 + \frac{{2{\text{a}}}}{{\text{b}}}} \right)$$
C $$\sigma \left( {1 + \frac{{\text{b}}}{{3{\text{a}}}}} \right)$$
D $$\sigma \left( {1 + \frac{{3{\text{a}}}}{{\text{b}}}} \right)$$
image of a black hole. Which black hole was the subject of this historic image?
A Sagittarius A
B Cygnus X-I
C Messier 87 (M87)
D V404 Cygni
Fixtures are used
A For holding and guiding the tool in drilling, reaming or tapping operations
B For holding the work in milling, grinding, planing or turning operations
C To check the accuracy of workpiece
D None of the above
When a hole of diameter ‘d’ is punched in a metal of thickness 't', then the force required to punch a hole is equal to (where $${\tau _{\text{u}}}$$ = Ultimate shear strength of the material of the plate)
A $${\text{dt}}{\tau _{\text{u}}}$$
B $$\pi {\text{dt}}{\tau _{\text{u}}}$$
C $$\frac{\pi }{4} \times {{\text{d}}^2}{\tau _{\text{u}}}$$
D $$\frac{\pi }{4} \times {{\text{d}}^2} \times {\text{t}}{\tau _{\text{u}}}$$
Jigs are used
A For holding and guiding the tool in drilling, reaming or tapping operations
B For holding the work in milling, grinding, planing or turning operations
C To check the accuracy of workpiece
D None of the above
In order to avoid tearing of the plate at an edge, the distance from the centre line of the rivet hole to the nearest edge of the plate should be equal to (where d = Diameter of rivet hole)
A 1 d
B 1.5 d
C 2.5 d
D 2 d
In order to avoid tearing off the plate at an edge, the distance from the center of the rivet hole to the nearest edge of the plate (i.e. margin) should be (where d = Diameter of rivet hole in mm)
A d
B 1.5 d
C 2 d
D 2.5 d
All legislative subject are mentioned in three lists union list, concurrent list and state list. Any subject is not mentioned in all three list, the law on that particular subject can be framed by-
A Parliament only
B State Legislature only
C 1 and 2
D Neither 1 nor 2

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