1.
Match List I with List II.
| List I | List II |
|---|---|
| (a) Exciter | (i) Voltage control |
| (b) Governor | (ii) Over current protection |
| (c) Lightning Arrester | (iii) Active power control |
| (d) Circuit Breaker | (iv) Over voltage protection |
Choose the most appropriate answer from the options given below :
Exam Year(s)
RSMSSB JE - 2025, RSMSSB - 2025,
Answer: A
The correct matching is (a)-(i), (b)-(iii), (c)-(iv), (d)-(ii).
- The exciter supplies the field current of the alternator, so it controls the terminal voltage (and reactive power): (i).
- The governor controls the prime mover's input, and so the active power output and frequency: (iii).
- A lightning arrester diverts surge overvoltages to earth: (iv).
- A circuit breaker interrupts overcurrents and fault currents when its relay trips it: (ii).
The other options give the governor voltage control or the circuit breaker overvoltage duty, which are the jobs of the exciter and the arrester.
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