← MES Departmental
Past Questions — 2026
What is the fundamental operational need for incorporating power substations into an electrical grid network?
A)
To convert AC electrical power completely into DC power for domestic use.
B)
To store excess bulk power during off-peak operational hours.
C)
To shift, regulate, switch, and transform electrical parameters safely between generation and consumption.
D)
To increase the frequency of the power system for better long-distance transmission.
Option C is correct: To shift, regulate, switch, and transform electrical parameters safely between generation and consumption..
What primary physical parameter remains constant during voltage step-up or step-down transformations in an ideal power transformer?
A)
Current and Resistance
B)
Power and Frequency
C)
Voltage and Impedance
D)
Magnetic Flux and Turns Ratio
Option B is correct: Power and Frequency.
Page 4
← Prev
Next →