ISRO Scientist or Engineer Mechanical 2014

A bar of Cu of length 75 cm and a steel bar of 125 cm length are joined together end to end. Both the bars are having same diameter of 2 cm. The free ends of the Cu and the steel bars are maintained at $$100^\circ C$$ and $$0^\circ C$$ respectively. The curved surfaces of the bars are thermally insulated, what is the approximate temperature at Cu-steel junction?
(consider conductivity K of $$Cu = 400 J s^{-1} m^{-1} {^\circ C^{-1}}$$ and K for steel $$50 Js^{-1} m^{-1} {^\circ C^{-1}}$$)

A sample of gas ($$\gamma = 1.5$$) is taken through an adiabatic process in which the volume is compressed from 1600 cm$$^3$$ to 400 cm$$^3$$. If intial pressure is 150 kPa, then how muchwill be the final pressure in the process?

One mole of a monatomic gas is taken through a cycle ABCDA as shown in the P-V diagram. Column II give the characteristics involved in the cycle. Match the process $$A \rightarrow B$$ with the processes given in Column II.

Process $$A \rightarrow B$$ signifies

Strain energy U, in the case of axially loaded bar is expressed as. (where P is axial load, L is bar length, A is cross-section area of the bar, E is Young’s Modulus of the bar, $$\sigma$$ is axial stress, $$\delta L$$ is elongation due to axial load)

Which of the following statements is correct, in case of a curved beam?

A Mohr’s circle reduces to a point when the body is subjected to

To drill holes of size 0.025mm, which is the most appropriate process?

Perforation in Aluminum plate occurs when it is connected with the Mild steel plate and exposed to the same environment. This phenomenon is explained by

A mixture of chemical compoundsor elements that have a single chemical composition and solidifies at the lowest temperature than any other composition made up of the same ingredients.

Which type of Gear meshing should be employed to transmit torque to a linear force?