Switch Gear And Protection Set 5

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This set of Switch Gear and Protection Multiple Choice Questions & Answers (MCQs) focuses on Switch Gear And Protection Set 5

Q1 | Oil switches are employed for
Q2 | A switchgear is device used for
Q3 | The fuse wire, in D.C. circuits, is inserted in
Q4 | By which of the following methods major portion of the heatgenerated in a H.R.C. fuse is dissipated ?
Q5 | A short-circuit is identified by
Q6 | The information to the circuit breaker under fault conditions isprovided by
Q7 | To limit short-circuit current in a power system are used.
Q8 | A balanced 3-phase system consists of
Q9 | In a single bus-bar system there will be complete shut down when
Q10 | Which device is used for protection of equipment from from damagecaused by overload or short circuit?
Q11 | Isolator in substation is open under ------------- condition?
Q12 | Earthling switch is used for
Q13 | If the time of operating of a relay for unity TMS is 10secs., the time ofoperation for 0.5 TMS will be
Q14 | A fault is more severe from the view point of RRRV if is a
Q15 | A reactance relay is
Q16 | For measuring positive, negative and zero sequence voltages in asystem, the reference is taken as
Q17 | Positive, negative and zero sequence impedances of a solidly grounded system under steady state condition always follow the relations
Q18 | Phase comparators in case of static relays and electro-mechanical relaysnormally are
Q19 | For reducing tower footing resistance it is better to use
Q20 | Rate of rise of restriking voltage depends
Q21 | What is the purpose of back up protection?
Q22 | What is the actuating quantity for the relays?
Q23 | Protective relays can be designed to respond to
Q24 | On what factor does the operating speed of the relay depend upon?
Q25 | What does the third part consist of?