218. A distance relay measures
A. current difference
B. voltage difference
C. impedance difference
D. distance between two CT's

---

219. Various power system faults in increasing order of severity are
A. LG, LL, LLG, LLLG
B. LLLG, LLG, LG, LL
C. LLG, LLLG, LL, LG
D. LL, LG, LLLG, LLG

---

220. Which of the following typeof reactors are popularly used in power systems?
A. compensation reactors
B. current limiting reactors
C. suppression or Peterson reactors
D. all of these

---

221. Shunt reactors are connected with transmission lines for
A. limiting fault current
B. limiting fault voltage
C. absorbing reacting power
D. absorbing high voltage surges

---

222. Minimum faults occur in which of the following power system equipment?
A. transformer
B. switch gear
C. CT, PT
D. alternator

---

223. Interruption due to fault and maintenance is minimum in
A. main and transfer bus arrangement
B. single bus arrangement
C. sectionalized single bus arrangement
D. double bus, double breaker arrangement

---

224. Most economic load on an overhead line is
A. greater than the natural load.
B. less than the natural load.
C. equal to the natural load.
D. none of these

---