GETCO EXAM PAPER (22-07-2015) QUIZ

Penalty factor in power system economical operation is measure of

generation cost

fuel cost

all are correct

Line loss

TRUE ANSWER : ?
YOUR ANSWER : ?

Two watt meter method for 3 phase circuit is preferred over other methods because

PF of the load can also be estimated

it can be used for balanced or unbalanced load

all are correct

it can be used for star or delta connected load

TRUE ANSWER : ?
YOUR ANSWER : ?

For a given transformer volte/turn for primary and secondary winding is

same

depends on transformer design

different

depends on load

TRUE ANSWER : ?
YOUR ANSWER : ?

In sub stations for making and breaking of load current

load interrupter switches are used

relays are used

isolators are used

circuit breakers are used

TRUE ANSWER : ?
YOUR ANSWER : ?

In rotating electrical machines, the insulation temperature limit for class B type is

150˚C

130˚C

105˚C

180˚C

TRUE ANSWER : ?
YOUR ANSWER : ?

In a power system network, at which bus the shunt is connected that can be known from

type of bus

reactive power demand

Y bus of the system

none of these

TRUE ANSWER : ?
YOUR ANSWER : ?

Steady state stability of a power system is improved by

reducing fault clearing time

by fast switching

using double circuit line instead of single circuit line

decreasing generator inertia

TRUE ANSWER : ?
YOUR ANSWER : ?

The surge impedance loading of the line will _____ if the length of the line is double

become half

double

four times

remains same

TRUE ANSWER : ?
YOUR ANSWER : ?

100% string efficiency means

Equal potential across each disc

One of the insulator discs shorted

Zero potential across each disc

None uniform potential distribution across each disc

TRUE ANSWER : ?
YOUR ANSWER : ?

For formation of the Y bus matrix (using node voltage analysis) in power system network modelling _____ is used

KVL

KCL

all are correct

Faraday's law

TRUE ANSWER : ?
YOUR ANSWER : ?

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