ISRO Scientist or Engineer Mechanical 2016

Joule-Thompsoncoefficient for an ideal gas is

Air is heated from $$0^\circ C$$ to $$100^\circ C$$ in a sealed metal container. Its density

If a certain massof moist air in an air tight vessel is heated to a higher temperature, then

Air is accelerated isentropically from 100 m/s to 300 m/s in a nozzle. If the temperature at the inlet is $$127^\circ C$$, the inlet Mach number is (take R = 287J/(kg K) and specific heat ratio = 1.4)

Two equal forces are acting at a point with an angle of $$60^\circ$$ between them. If the resultant force is equal to $$60 \sqrt{3}$$ , what is the magnitudeof each force?

Atwo member truss ABCis configured as shown in figure. The force in the member AB is

Four forces of magnitudes 20 N, 40 N, 60 N and 80 are acting respectively along the four sides of a square ABCD as shown in figure. The magnitude of resultant is

In a simply supported beam loaded as shown in figure, the maximum bending moment in Nm is

Two steel rails each of 12 m length are laid with a gap of 1.5 mm at ends at a temperature of 24°C. The thermal stress produced at a temperature of $$40^\circ C$$ is (take $$E = 2 \times 10^5$$ N/mm$$^2$$ coefficient of thermal expansion = $$12 \times 10^{-6}/^\circ C$$)

An aluminum tensile test specimen has a diameter, $$d_o = 25 mm$$ and a gauge length of $$L_o = 250 mm$$. If a force of 175 KN elongates the gauge length by 1.25 mm, the modulus
of elasticity of the material is nearly