Electrical Engineering Questions And Answers :: Switchgear Protections: part3



Electrical Engineering : Switchgear Protections QUESTIONS AND ANSWERS :: part3 : 6 to 10

Following Electrical Engineering Multiple choice objective type questions and answers will help you in BSNL JTO, GATE 2024 and IES 2024 examinations :

6.Which of the following circuit breakers has high reliability and minimum maintenance ?

Air blast circuit breakers
Circuit breaker with SF6 gas
Vacuum circuit breakers
Oil circuit breakers

7.Arc in a circuit breaker is interrupted at

zero current
maximum current
minimum voltage
maximum voltage

8.For which of the following protection from negative sequence currents is provided ?

Generators
Motors
Transmission line
Transformers

9.Which of the following statements is incorrect ?

Lightning arrestors are used before the switchgear
Shunt reactors are used as compensation reactors
The peak short current is (1.8 xV2) times the A.C. component
The MVA at fault is equal to base MVA divided by per unit equivalent fault reactance

10.A.C. network analyser is used to solve problems of

load flow
load flow and short-circuit
load flow and stability
load flow, short-circuit and stability

More Switchgear Protections QUESTIONS AND ANSWERS available in next pages

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