ISRO Scientist or Engineer Electrical 2014

Instructions

For the following questions answer them individually

Question 1

A Meter has full scale deflection of $$90^\circ$$ at a current of 1A. The response of the meter is square law. Assuming spring control, the current for a deflection at $$45^\circ$$ will be

Video Solution

Question 2

A Single-phase Energy meter is operating on 230 V, 50 Hz supply with a load of 20 A for two hours at UPF. The meter makes 1380 revolutions in that period. The meter constant is

Video Solution

Question 3

In case of power measurements by two wattmeter method in a balanced 3-phase system with pure inductive load

Video Solution

Question 4

It is required to measure temperature in the range of $$1300^\circ C$$ to $$1500^\circ C$$. The most suitable thermocouple to be used as transducer would be

Video Solution

Question 5

Which dc motor will have highest percentage increase in input current for given percentage increase in torque

Video Solution

Question 6

In a three phase delta transformer, one phase burns up. The transformer will supply

Video Solution

Question 7

In an auto transformer, power is transferred through

Video Solution

Question 8

Buchholzrelay is a

Video Solution

Question 9

In Scott connection, if the ratio of the main transformer is k, then the teaser transformer has transformation ratio of

Video Solution

Question 10

With core type transformers, the limbs are stepped so as to

Video Solution

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ISRO Scientist or Engineer Electrical 2014

A Meter has full scale deflection of $$90^\circ$$ at a current of 1A. The response of the meter is square law. Assuming spring control, the current for a deflection at $$45^\circ$$ will be

A Single-phase Energy meter is operating on 230 V, 50 Hz supply with a load of 20 A for two hours at UPF. The meter makes 1380 revolutions in that period. The meter constant is

In case of power measurements by two wattmeter method in a balanced 3-phase system with pure inductive load

It is required to measure temperature in the range of $$1300^\circ C$$ to $$1500^\circ C$$. The most suitable thermocouple to be used as transducer would be

Which dc motor will have highest percentage increase in input current for given percentage increase in torque

In a three phase delta transformer, one phase burns up. The transformer will supply

In an auto transformer, power is transferred through

Buchholzrelay is a

In Scott connection, if the ratio of the main transformer is k, then the teaser transformer has transformation ratio of

With core type transformers, the limbs are stepped so as to

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