ISRO Scientist or Engineer Mechanical 2018

Instructions

For the following questions answer them individually

Question 1

An expansion process as per law PV = constant is known as

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Question 2

Speed of an aeroplane is measured by

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Question 3

Euler's dimensionless number relates the following

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Question 4

A simple compressible substance inside a cylinder undergoes a change of state quasistatically, isothermally and at constant pressure of 1.5 MPa. If the enthalpy change for the system is 4000 kJ at $$150^\circ C$$, what is the corresponding change in its entropy?

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Question 5

The velocity of sound in a gaseous medium at a temperature of 400 K is 400 m/s. If the temperature of the medium is increased to 600 K, the velocity of sound will be nearly,

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Question 6

Stress strain relation of the Newtonian fluid is

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Question 7

Speed of sound in water is equal to (K-bulk modulus, $$\rho$$-density)

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Question 8

If the stream function of a two dimensional flow is $$\psi = 5 xy$$. then the velocity at a point (3, 4)is

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Question 9

A glass tube of 8 mm diameter is immersed in water. Surface tension of water is 0.0075 kg/m and rise of water in the tube due to capillary effect is

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Question 10

An impulse turbine produces 125 hp under a head of 25 meter. By what percentage should the speed be increased for a head of 100 meter.

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