ISRO Scientist or Engineer Mechanical 2012

A beam is having-a-triangular cross section with its neutral axis XX. The section modulus about XX is given by

A rectangular column is subjected to an eccentric load P at distance ‘e’ from centroidal Axis. The stress diagram at Cross- section will be

Two shafts A & B are made of same material. The radius of the shaft A is half that of shaft B. The power transmitted by the shaft A will be ___________ that of shaft B.

Four linear elastic springs are connected to mass ‘M’ as shown in Figure. The natural frequency of the system is

Which bearing offers lowest friction

A circular disk of radius R rolls without slipping at a velocity V. The magnitude of the velocity at point P shown in the figure is

In the viscous damped vibration, the logarithmic decrement value over five cycles is found to be 8.11. What is viscous damping factor of vibratory system?

An elevator weighing 1000Kg attains an upward velocity of 4m/sec in two seconds with uniform acceleration. The tension (in N) in supporting cable will be $$(g = 9.8m/sec^2)$

A block weighting 981 N is resting on Horizontal surface. The co-efficient of friction between the block and horizontal surface is $$\mu = 0.2.$$ A vertical cable attached to block provides partial support as shown. A man can pull horizontally with a force of 100 N. What will be the tension (T)(in N)in the cable if the man is just able to move the block to the right?

A vehicle suspension system consists of a leaf spring and a damper. The stiffness of the leaf spring is 3.6 KN/m and damping constant of the damper is 400 Ns/m. If the mass is 50Kg, then the damping factor and damped natural frequency respectively are