For reducing tower footing resistance it is better to use
A) Chemical and ground rods only.
B) Chemical and counterpoise only.
C) Ground rod and counterpoise only.
D) Chemical, ground rods and counterpoise.
Correct Answer:
Verified
Q14: A fault is more severe from the
Q15: A reactance relay is
A)Voltage restrained directional relay.
B)Directional
Q16: For measuring positive, negative and zero sequence
Q17: Positive, negative and zero sequence impedances of
Q18: Phase comparators in case of static relays
Q20: Rate of rise of restriking voltage depends
A)Type
Q21: What is the purpose of back up
Q22: What is the actuating quantity for the
Q23: Protective relays can be designed to respond
Q24: On what factor does the operating speed
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