SSC JE Mechanical Engineering 2015

Instructions

For the following questions answer them individually

Question 161

The efficiency of a centrifugal pump is maximum when its blades are

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Question 162

To avoid cavitation in centrifugal pumps

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Question 163

Loss of energy per unit volume due to friction in case of flow through a pipe at length L and diameter D is expressed as

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Question 164

In an isothermal process, the heat transfer is

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Question 165

A heat engine receives 1000 kJ of heast and produces 600 kJ of work. The amount of hear rejected in kJ and the efficiency percentage of the engine, respectively will be

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Question 166

The efficiency of a Carnot Engine depends on

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Question 167

In case of S.I. engine to have high thermal efficiency of fuel air mixture ratio should be

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Question 168

For the same output, same speed and same compression ratio the thermal efficiency of a two stroke cycle petrol engine as compared to that for stroke cycle petrol engine is

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Question 169

The chemically correct stoicheiometric ratio for petrol is

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Question 170

The mean effective pressure of an Otto cycle is the ratio between

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