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# GATE 2022 Rapid Revision Weekly Quiz 8

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Question 1

The slenderness ratio for long columns is:

Question 2

The COP of a refrigerator working on a reversed Carnot cycle is 5. The ratio of the highest absolute temperature to the lowest absolute temperature would be

Question 3

The efficiency of superheat Rankine cycle is higher than that of simple Rankine cycle because _______.

Question 4

During solidification of a pure molten metal, the grains in the casting near the mould wall are _______.

Question 5

The ratio of torque carrying capacity of solid shaft to that of hollow shaft of same material and of outer diameter equal to diameter of solid shaft is:

Where,

Di = inner diameter of hollow shaft

Do = outer diameter of hollow shaft

and τmax = Permissible shear stress for shaft material

Question 6

In which type of welding, a pool of molten metal is used?

Question 7

Match the following:

Question 8

A two-cylinder two-stroke have bore and stroke 300 mm and 500 mm respectively, Find the mean piston speed in meter per second at 300 rpm ______.

Question 9

Anti-friction bearings are ______.

Question 10

The value of principle stress (σ1) in terms of principle strain E1 and E2 is given by:

Question 11

Moment of Inertia of a triangular section of base a and height h about an axis passing through its centre of gravity and parallel to base is

Question 12

Water at ambient temperature flows through the horizontal pipe of uniform of cross-section. It the pressure drop across the pipe increase. The power required to pump the water across the pipe will be
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