ISRO Scientist or Engineer Refrigeration & Air-Conditioning 2018

If the Bending moment is increased three times, then to keep the stress in the beam same, sectional modulus shall be

A beam with rectangular section of $$120 mm \times 40 mm$$ is placed horizontally by mistake, (with width as 120 mm and depth as 40 mm) whereas it was designed to be placed vertically. (with width as 40 mm and depth as 120 mm). The ratio of section modulus will be

If a shaft is required to transmit twice the power at twice the speed for which it is designed, its diameter must

The strength of a hollow shaft in comparison to solid shaft, both having outer diameter D and inner diameter of hollow shaft as $$\frac{D}{2}$$

Steel bar of $$40 mm \times 40 mm$$ square section is subjected to an axial compressive load of 200 kN. If the length of the bar is 2 m and E (Youngs modulus) = 200 GPa. The elongation of bar will be

The shear force diagram for a simply supported beam carrying uniformly distributed load of w per unit length, consists of

The power transmitted by a shaft 60 mm diameter at 180 RPM, if the permissible stress is $$85 N/mm^{2}$$

A material has a young’s modulus of $$1.25 \times 10^{5}$$ $$\frac{N}{mm^{2}}$$ and a poisson’s ratio of 0.25. The bulk modulus of the material will be

Neutral solution is one which has pH value

Forced feed lubrication system means that oil is delivered to the engine by