ISRO Scientist or Engineer Refrigeration & Air-Conditioning 2020

Instructions

For the following questions answer them individually

Question 41

The blade height of axial compressor decreases in axial direction to maintain

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Question 42

The T joint of steel plates which is subjected to 350 kN load is developed using intermitted 4 double fillet welds of length each of 40 mm at an interval of 100 mm. Allowable shear strength of the weld metal is 100 MPa. Determine the leg length of the weld

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Question 43

Shaping grey cast iron will produce

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Question 44

For same tool-work materials and speed, feed and depth of cut, the average cutting temperature will decrease

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Question 45

Extreme Pressure Additive (EPA)is mixed with cutting fluid for improving its power of

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Question 46

Equation of the line normal to function $$f(x) = (x - 8)^{\frac {2}{3}} + 1$$ at P(0, 5) is

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Question 47

The area enclosed between the curves $$y^2 = 4x$$ and $$x^2 = 4y$$ is

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Question 48

The Laplace transform of $$e^{i5t}$$ where $$i = \sqrt{-1}$$, is

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Question 49

If $$y = f (x)$$ is the solution of $$\frac{d^2 y}{dx^2} = 0$$, with the boundary conditions y = 5 at x = 0 and $$\frac{dy}{dx} = 2$$ at x = 10, f(15) =

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Question 50

Given two complex numbers $$z_1 = 5 + (5 \sqrt 3)i$$ and $$z_2 = \frac{2}{\sqrt 3} + (2)i,$$ the argument of $$\frac{z_1}{z_2}$$ in degree is

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