a) All the units will be equally loaded
b) Feedback is easy
c) VAR output of units decreased
d) Loading of the units are adjusted t equal incremental fuel costs

Ans: (d)

a) Saluting of swing equation
b) Critical reclosure time
c) Change in frequency errors
d) Change in velocity errors

Ans: (b)

a) Operating voltage
b) Reactance of the lines
c) Cross-section of conductor
d) None of these

Ans: (b)

a) Single machines and infinite bus
b) Two machines and infinite bus
c) Three machines and infinite bus
d) Four machines and infinite bus

Ans: (a)

a) It may go out of synchronism
b) Speed will cross the rated speed
c) It will burn
d) It will stop instantaneously

Ans: (a)

a) A constant power is flowing
b) Frequency is exactly 50 Hz
c) There is synchronism between machines and external tie lines
d) All of these

Ans: (c)

a) Increasing load on the plant
b) Decreasing load on the plant
c) Keeping load on the plant constant
d) None of these

Ans: (a)

a) Stability
b) Instability
c) Steady state stability
d) None of these

Ans: (b)

a) Increasing generation
b) Decreasing generation
c) Coordinating with other interconnected systems
d) None of these

Ans: (c)

a) Fault clearing time
b) Strength of transmitting network
c) Short circuit ratio of generating unit
d) All of these

Ans: (d)

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