Switch Gear And Protection Set 2

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This set of Switch Gear and Protection Multiple Choice Questions & Answers (MCQs) focuses on Switch Gear And Protection Set 2

Q1 | A transmission line is protected by
Q2 | Large internal faults are protected by
Q3 | When a transmission line is energized, the wave that propagates on itis
Q4 | Protective relays are devices that detect abnormal conditions inelectrical circuits by measuring
Q5 | The voltage appearing across the contacts after opening of the circuit breaker is called______voltage.
Q6 | Ionization in circuit breaker is facilitated by
Q7 | In a circuit breaker the basic problem is to
Q8 | Overheating of relay contacts or contact born out is due to
Q9 | Interruption of large currents by relay requires
Q10 | Shunt capacitance is neglected while considering
Q11 | The arc voltage produced in A.C. circuit breaker is always
Q12 | The time of closing the cycle, in modern circuit breakers is
Q13 | Insulation resistance of high voltage circuit breakers is more than
Q14 | H.R.C. fuses provide best protection against
Q15 | The ground wire should not be smaller than No ______ copper.
Q16 | The delay fuses are used for the protection of ________ .
Q17 | Which of the following is the least expensive protection for overcurrent is low voltage system ?
Q18 | Resistance grounding is used for voltage between
Q19 | The contacts of high voltage switches used in power system are submerged in oil. The main purpose of the oil is to
Q20 | In Railway applications ______ circuit breaker is used.
Q21 | To protect most of the electrical equipment handling low power, thetypes of relays used are
Q22 | Wave trap is used to trap waves of
Q23 | Ungrounded neutral transmission system is not recommendedbecause of system
Q24 | The reflection co-efficient at the open circuited end of a transmissionline.
Q25 | For the protection of power station buildings against direct strokes the requirements are