GETCO EXAM PAPER (30-11-2008) QUIZ

When a star delta transformer bank of three single phase transformers is to be used for step down transformation with line voltages of 23000 V and 2300 V, the ratio of transformation will be

12.1:1

5.8:1

17.2:1

10.0:1

TRUE ANSWER : ?
YOUR ANSWER : ?

The function of a breather in a transformer is

to control the level of oil in the tank

to provide protection against over currents

to arrest flow of moisture into the tank

to suppress harmonics

TRUE ANSWER : ?
YOUR ANSWER : ?

Ashoka sent his son and daughter for the preaching of Buddhism to

Javadvipa

Sumatra

Ceylon

Kambodia

TRUE ANSWER : ?
YOUR ANSWER : ?

Dynamic stability characteristics are predominant in the period

both (b) & (c )

while governor is in action

between the time the governors start reacting and when the steady-state stability is reached

immediately following a loss of load

TRUE ANSWER : ?
YOUR ANSWER : ?

A buchholz will operate in a transformer whenever there is

saturation of magnetic circuit

any of the above

large internal fault

over load

TRUE ANSWER : ?
YOUR ANSWER : ?

The Indian National Congress had its birth in the year

1757

1885

1775

1875

TRUE ANSWER : ?
YOUR ANSWER : ?

The effect of wind pressure is more predominant on

transmission lines

insulator

supporting towers

neutral wires

TRUE ANSWER : ?
YOUR ANSWER : ?

In a transformer it is difficult to measure the efficiency by output-input measurement methods because

output is out of phase with respect to input

the output is sinusoidal and hence cannot be measured

losses are abnormally high

efficiency of transformer is usually high and hence extremely accurate measurements will be necessary

TRUE ANSWER : ?
YOUR ANSWER : ?

The power transmitted will be maximum when

receiving end voltage is more

corona losses are least

reactance is high

sending end voltage is more

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YOUR ANSWER : ?

Supreme Command of all the three wings of the armed forces is vested in the

Chief of Army Staff

President of India

Defence Minister

Prime Minister of India

TRUE ANSWER : ?
YOUR ANSWER : ?