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UP Polytechnic Lecturer: Mechanical Quiz 27

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Question 1

Pressure intensifier increases the pressure in proportion to ________.

Question 2

The stream function in a two-dimensional flow field is given by Ψ = 3x – 4y +17xy. Then the magnitude of velocity at point (0,0) is:

Question 3

Which term defines the fluctuation of speed of a flywheel in terms of angular speeds?

Question 4

The efficiency of circumferential joint is 62%. Calculate the pitch of circumferential joint if diameter of rivets is 25mm.

Question 5

The temperature of solid surface changes from 27 °C to 627 °C. The emissive power changes would then confirm to the ratio ________.

Question 6

A particle is moving such that s = t³ – 6t² + 18t + 9, where s is in metres and t is in second. The minimum velocity attained by the particle is

Question 7

Match List-I with List-II and select the correct answer using the code given below the list :
List-I
A. Capillarity
B. Vapour pressure
C. Viscosity
D. Specific gravity
List-II
1) Cavitation
2) Density of water
3) Shear forces
4) Surface tension

Question 8

A thermal energy reservoir of 1200 K, can supply heat at a rate of 120000 kJ/h. If environment temperature is 27 °C, then the exergy (in kW) of this supplied energy is

Question 9

For a certain 2-D incompressible flow the velocity is given by

. Find the equation of streamline passing through the point (2,2)

Question 10

For perfectly elastic bodies, the value of coefficient of restitution is

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AE & JE Exams Mechanical Engineering

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