ISRO Scientist or Engineer Mechanical 2011

A thin cylinder contains fluid at a pressure of $$30 kg/cm^2$$.The inside diameter of the shell is 60 cm and the tensile stress in the material is to be limited to $$900 kg/cm^2$$. The shell must have minimum wall thickness of.

When a shaft is subjected to combined twisting moment (T) and bending moment (M), the equivalent twisting moment is equal to

Two blocks with masses M and m are in contact with each other and are resting on 2 horizontal friction less floor. When horizontal force F is applied to the heavier, the blocks accelerate to the right. The force between the two blocks are

A machine mounted on a single coil spring has a perriod of free vibration of T. If the spring is cut into four equal parts and placed in parallel and the machine is mounted on them, then the period of free vibration of the new system will be

Dislocations in materials are

Which of the following thermocouple is capable of measuring highest temperature?

Acircular rod of 100mm diameter and 500mm length is subjected to a tensile force of 1000KN. Determine the modulus of rigidity (G) if $$E = 2 \times 10^5 N/mm^2$$ and Poisson’s = 0.3

For the state of stress shown in the above figure, normal stress acting on the plane of maximum shear stress is

The effective diameter of an external or internal screw thread, is known as

Consider the following statements:
If at section away from the ends of the beam, M represents the bending moment, $$V$$ the shear force, $$w$$ the intensity of loading and $$y$$ represents the deflection of the beam at the section, then
1.$$\frac{dM}{dx} = V$$
2.$$\frac{dV}{dx} = w$$
3.$$\frac{dw}{dx} = y$$
Of these statements