Switchgear Protections — Part 2 MCQs with Explanations

motors is the correct answer to “The delay fuses are used for the protection of ________ .”. This question is standard in competitive examination syllabi for Switchgear Protections.

all of the above is the correct answer to “Ungrounded neutral transmission system is not recommended because of system”. This question is standard in competitive examination syllabi for Switchgear Protections.

Capacitance is the correct answer to “Which of the following parameter can be neglected for a short line”. This question is standard in competitive examination syllabi for Switchgear Protections.

short transmission line is the correct answer to “Shunt capacitance is neglected while considering”. This question is standard in competitive examination syllabi for Switchgear Protections.

all of the above is the correct answer to “The under voltage relay can be used for”. This question is standard in competitive examination syllabi for Switchgear Protections.

Have all above properties is the correct answer to “In order that current should flow without causing excessive heating or voltage drop, the relay contacts should”. This question is standard in competitive examination syllabi for Switchgear Protections.

Heating effect is the correct answer to “On which of the following effects of electric current a fuse operates”. This question is standard in competitive examination syllabi for Switchgear Protections.

all of the above is the correct answer to “Ionization in circuit breaker is facilitated by”. This question is standard in competitive examination syllabi for Switchgear Protections.

zero current is the correct answer to “Arc in a circuit breaker is interrupted at”. This question is standard in competitive examination syllabi for Switchgear Protections.

fast switches is the correct answer to “Fault diverters are basically”. This question is standard in competitive examination syllabi for Switchgear Protections.

all above is the correct answer to “Relays can be designed to respond to changes in”. This question is standard in competitive examination syllabi for Switchgear Protections.

All of the above is the correct answer to “On which of the following routine tests are conducted”. This question is standard in competitive examination syllabi for Switchgear Protections.

Impedance is the correct answer to “Relays are used for phase faults on long line.”. This question is standard in competitive examination syllabi for Switchgear Protections.

Conduction is the correct answer to “By which of the following methods major portion of the heat generated in a H.R.C. fuse is dissipated”. This question is standard in competitive examination syllabi for Switchgear Protections.

all of the above is the correct answer to “The relay operating speed depends upon”. This question is standard in competitive examination syllabi for Switchgear Protections.

melting is the correct answer to “The fuse blows off by”. This question is standard in competitive examination syllabi for Switchgear Protections.

lower than that of if fault occurs away from the relay is the correct answer to “If the fault occurs near the impedance relay, the VII ratio will be”. This question is standard in competitive examination syllabi for Switchgear Protections.

high voltages and large currents circuits is the correct answer to “Oil switches are employed for”. This question is standard in competitive examination syllabi for Switchgear Protections.

Circuit breaker with SF6 gas is the correct answer to “Which of the following circuit breakers has high reliability and minimum maintenance”. This question is standard in competitive examination syllabi for Switchgear Protections.

equal to and above 5 MVA is the correct answer to “For which of the following ratings of the transformer differential protection is recommended”. This question is standard in competitive examination syllabi for Switchgear Protections.

sending and other end is the correct answer to “When a wave propagates on a transmission line, it suffers reflection several times at”. This question is standard in competitive examination syllabi for Switchgear Protections.

Air is the correct answer to “Which of the following medium is employed for extinction of arc in air circuit breaker”. This question is standard in competitive examination syllabi for Switchgear Protections.

constantly the electrical quantities which differ during normal and abnormal conditions is the correct answer to “Protective relays are devices that detect abnormal conditions in electrical circuits by measuring”. This question is standard in competitive examination syllabi for Switchgear Protections.

neutral wire is the correct answer to “A fuse is never inserted in”. This question is standard in competitive examination syllabi for Switchgear Protections.

In phase with the arc current is the correct answer to “The arc voltage produced in A.C. circuit breaker is always”. This question is standard in competitive examination syllabi for Switchgear Protections.

all of the above is the correct answer to “The interaction between a transmission line and communication line is minimized by”. This question is standard in competitive examination syllabi for Switchgear Protections.

Both (B) and (C) is the correct answer to “A transmission line is protected by”. This question is standard in competitive examination syllabi for Switchgear Protections.

Rewireable fuse is the correct answer to “Which of the following is the least expensive protection for overcurrent is low voltage system”. This question is standard in competitive examination syllabi for Switchgear Protections.

merz price percentage differential protection is the correct answer to “Large internal faults are protected by”. This question is standard in competitive examination syllabi for Switchgear Protections.

all of the above is the correct answer to “Over voltage protection is recommended for”. This question is standard in competitive examination syllabi for Switchgear Protections.

generator transformer of the power plant is the correct answer to “Overfluxing protection is recommended for”. This question is standard in competitive examination syllabi for Switchgear Protections.

main and transfer bus is the correct answer to “Bus coupler is very essential in arrangement”. This question is standard in competitive examination syllabi for Switchgear Protections.

transmission line is the correct answer to “The power loss is an important factor for the design of”. This question is standard in competitive examination syllabi for Switchgear Protections.

three phase motors is the correct answer to “The single phasing relays are used for the protection of”. This question is standard in competitive examination syllabi for Switchgear Protections.

extinguish the arc is the correct answer to “The contacts of high voltage switches used in power system are submerged in oil. The main purpose of the oil is to”. This question is standard in competitive examination syllabi for Switchgear Protections.

reactors is the correct answer to “To limit short-circuit current in a power system are used”. This question is standard in competitive examination syllabi for Switchgear Protections.

compensate for line inductive reactance is the correct answer to “Series capacitors are used to”. This question is standard in competitive examination syllabi for Switchgear Protections.

fault occurs on the bus itself is the correct answer to “In a single bus-bar system there will be complete shut down when”. This question is standard in competitive examination syllabi for Switchgear Protections.

two or more similar electrical quantities is the correct answer to “A differential relay measures the vector difference between”. This question is standard in competitive examination syllabi for Switchgear Protections.

Switching, controlling and protecting the electrical circuit and equipment is the correct answer to “A switchgear is device used for”. This question is standard in competitive examination syllabi for Switchgear Protections.