SSC JE Mechanical Engineering 25th Jan 2018 Shift-2

Instructions

For the following questions answer them individually

Question 191

When a hydraulic turbine is operated, it is found that it has a high design efficiency and this efficiency remains constant over a wide range of regulation from the design condition. Whatis the type ofthis turbine?

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Question 192

A 40 mm diameter 2 m long straight uniform pipe carries a steady flow of water (viscosity 1.02 centipoise) at the rate of 3.0 L/min. What is the approximate value of the shear stress on the internal wall of the pipe?

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Question 193

Steady flow occurs when

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Question 194

A piece of wood having weight 5 kg floats in water with 60 %of its volume under the liquid. The specific gravity of woodis

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Question 195

Principle of similitude forms the basis of

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Question 196

Multistage centrifugal pumps are used to obtain

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Question 197

Medium specific speed of turbine impliesit is

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Question 198

In mixed flow centrifugal pump

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Question 199

If D is the diameter of Pelton wheel and d is the diameter of the jet, then number of buckets on the periphery of a Pelton wheel is equal to

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Question 200

Specific speed for impulse wheels ranges from

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