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NLC Technical Quiz 29

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Question 1

In a limit system, the following limits are specified to give a clearance fit between a shaft and a hole.

What is the ratio of maximum to minimum clearance______?

Question 2

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 3

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

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

Question 4

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

Question 5

The acceleration of the piston at the position when the crank makes an angle of 90^o with the line of slider is equal to

(Consider the length of connecting rod as 250 mm and crank radius as 50 mm)

where R is crank radius and is angular velocity of crank

Question 6

The locus of the temperature distribution curve in a glass slab with uniform heat generation throughout is______.

Question 7

Two bars each of length L and of the same material are subjected to the same axial tensile force P. The first bar has a uniform diameter 2d. The second bar has a diameter d for length l and a diameter 2d for the remaining length. The ratio of the strain energies of the two bars U₁/U₂ is _________.

Question 8

Trepanning is used for______.

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