Electrical Engineering · Question Bank

Faults

106 questions · page 6 of 6. Answer in your head first, then check the solution.

📘 EE Mock Board Exam

#101📜 EE Pre-Board March 2018📘 PowerhouseEasy

A relay is used to

Areceive a signal and record it

Bprotect a circuit

Cconnect a line to the source

Drelay a message to a remote place

#102📜 EE Pre-Board August 2018📘 PowerhouseEasy

If 25 ohms and 125 amperes are the base impedance and base current, respectively for a given system, what is the base KVA?

A781.25

B39.1

C390.625

D76.12

#103📜 EE Pre-Board August 2018📘 PowerhouseMedium

In a 13.8 kV, 10 MVA base three-phase system, a phase to phase fault occurs. If the Thevenin’s equivalent impedance of the system is 2.63%, what is the per unit fault current?

A19.01 pu

B32.93 pu

C57.03 pu

D98.78 pu

#104📜 EE Pre-Board August 2018📘 PowerhouseEasy

What is the equivalent IEEE device function number for directional power relay?

A21

B32

C37

D87

#105📜 EE Pre-Board August 2018📘 PowerhouseEasy

The purposes of insulating oil when used in power circuit breakers are the following EXCEPT

AInterrupter

BCoolant

CInsulation

DQuencher

#106📜 EE Pre-Board August 2018📘 PowerhouseEasy

The current from the neutral to the ground connection is 12 A. What is the zero sequence component in each phase?

A12 A

B36 A

C4 A

D3 A

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