DMRC Mechanical Engineering Paper-1 2016
For the following questions answer them individually
The static deflection of a shaft under a flywheel is 4 mm. What is the critical speed in rad/sec if g= 10 $$m/sec^{2}$$
According to Indian Standard specifications 50H7g6 means that:
1.Actual size is 50 mm
2.Tolerance grade for hole is 7
3.Tolerance grade for shaft is 6
A wooden block rests on a horizontal force as shown in figure. The force (P) acting on it at an angle of $$25^\circ$$ with horizontal. Assume the mass of block to be 8 Kg and coefficient of friction is 0.45
The force (P) is:
The maximum distortion energy theory of failure is suitable to predict the failure of which one of the following type of materials?
Consider two rods A, B of the same material and subjected to equal axial load. The rod A is of uniform cross-section with diameter d, and the rod B taper uniformly from diameter d at one end to diameter d/2 at other end. The ratio of elongation of rod A to elongation of rod B will be:
