ISRO Scientist or Engineer Mechanical 2016


For the following questions answer them individually

Question 61

A stream function is given by $$\psi = 4x - 3y$$. The resultant velocity at any point is

Video Solution

Question 62

The coefficient of discharge for an orifice meteris in the range

Video Solution

Question 63

The hydraulic diameter, $$D_h$$, of a rectangular duct with sides 'a’ and 'b' is

Video Solution

Question 64

A flat plate of length 1 m and width 50 cm is placed in an air stream at $$30^\circ C$$ blowing parallel to it. The convective heat transfer co-efficient is 30 W/(m$$^2$$K). The heat transfer if the plate is maintained at a temperature of $$400^\circ C$$ is

Video Solution

Question 65

It is required to insulate a kitchen oven with cork board (K = 0.043 W/(m K)) so that the heat losses from the oven does not exceed 400 W/m$$^2$$ when the inner surface of the oven is at $$225^\circ C$$ and the outer surface of the oven is at $$40^\circ C$$. The thickness of insulation required is nearly

Video Solution

Question 66

A radiator in a domestic heating system operates at a surface temperature of $$55^\circ C$$. Assuming the radiator behaves as a black body, the rate at which it emits the radiant heat per unit area is (assume $$\sigma = 5.67 \times 10^{-8} W/(m^2 K^4)$$)

Video Solution

Question 67

Agrey body is defined such that

Video Solution

Question 68

Monochromatic emissivity of the body is dependent of wave length

Video Solution

Question 69

Asystem is undergoing a cycle that consists of three processes. During the first process, the work is 5 kJ and the heat is 23 kJ. In the second process no work takes place and the heat interaction is -50 kJ. The third process is adiabatic. The workin the third process is

Video Solution

Question 70

Multi stage centrifugal pumpsare used for

Video Solution

Register with


Boost your Prep!

Download App