SSC JE Mechanical Engineering 25th May 2014 Shift-2

Instructions

For the following questions answer them individually

Question 111

Fatigue of a component is due to

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Question 112

If $$V_i$$be the inlet absolute velocity to blades, $$V_b$$ be the tangential blade velocity and $$\alpha$$ br the nozzle angle, then for maximum blade efficiency for single-stage impulse turbine

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Question 113

In diesel engines, the duration between the timeofinjection andignition, is known as

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Question 114

The process of supplying the in take air to the engine cylinder at a density more than the density of the surrounding atmosphere is known as

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Question 115

Which of the following expressions gives the entropy change in an isobaric heating process from $$T_1$$ to $$T_2$$ ?

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Question 116

Morsetest is conducted on

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Question 117

In spark ignition (SI) engines, the possibility of knockingcari be reduced by

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Question 118

Higher compression ratio in diesel engine results in

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Question 119

What salts of calcium and magnesium cause temporary hardness of boiler feed water?

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Question 120

Which of the following does not relate to steam engine ?

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