SSC JE Electrical Engineering 2011

Instructions

For the following questions answer them individually

Question 141

During arc extinction $$SF_6$$ gets

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Question 142

Sparking between the contacts of a circuit breaker can be reduced by inserting

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Question 143

If the inductance and capacitance of a power system are respectively 1H and 0.01 $$\mu F$$ and the instantaneous value of interrupted current is 10A, then the voltage across the breaker contacts will be

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Question 144

Which of the following materials for heating element should be selected if a furnace is to be used for heating upto temperature around $$1500^\circ C$$ ?

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Question 145

The type of DC generator used for arc welding should be a

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Question 146

A transistor is operating in common emitter mode as shown in figure given below. The voltage $$V_{CE}$$ is

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Question 147

By increasing the transmission voltage to double of its original value the same power can be despatched keeping the line loss

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Question 148

Which of the following is true ?

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Question 149

An electric load consumed 17.32 kW at a power factor of 0.707 (lagging). For changing the load power factor to 0.866 (lagging), the capacitor that is to be connected in parallel with the load, should draw

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Question 150

The most appropriate way of mitigating the problem of interference between power line and commutation line is to

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