Switchgear protections

[amp_mcq option1=”less than” option2=”same as” option3=”more than” option4=”proportional to E. not directly related with” correct=”option3″]

Detailed SolutionThe line insulation is the insulation level of the station equipment.

[amp_mcq option1=”merz price percentage differential protection” option2=”mho and ohm relays” option3=”horn gaps and temperature relays” option4=”earth fault and positive sequence relays” correct=”option1″]

Detailed SolutionLarge internal faults are protected by

[amp_mcq option1=”hydro-electric generators” option2=”steam turbine generators” option3=”gas turbine generators” option4=”all of the above E. none of the above” correct=”option4″]

Detailed SolutionOver voltage protection is recommended for

[amp_mcq option1=”low resistance” option2=”high resistance” option3=”low impedance” option4=”high impedance” correct=”option4″]

Detailed SolutionSeries reactors should have

[amp_mcq option1=”short transmission line” option2=”medium transmission line” option3=”long transmission line” option4=”medium and long transmission lines” correct=”option3″]

Detailed SolutionShunt capacitance is neglected while considering

[amp_mcq option1=”Impedance” option2=”Reactance” option3=”Either of the above” option4=”None of the above” correct=”option1″]

Detailed SolutionRelays are used for phase faults on long line.

[amp_mcq option1=”required to operate the circuit breaker” option2=”absorbed by the circuit of relay” option3=”developed by the relay circuit” option4=”none of the above” correct=”option2″]

Detailed SolutionBurden of a protective relay is the power

[amp_mcq option1=”Inverse time trip” option2=”Time-delay trip” option3=”Shunt trip” option4=”None of the above E. All of the above” correct=”option1″]

Detailed SolutionWith which of the following, a circuit breaker must be equipped for remote operation ?

[amp_mcq option1=”to operate the relay of circuit breaker” option2=”as a substitute for circuit breaker” option3=”always independent of the position of circuit breaker” option4=”generally on both sides of a circuit breaker” correct=”option4″]

Detailed SolutionAn isolator is installed

[amp_mcq option1=”arc suppressing blow out coils” option2=”wide separation of the opened contacts” option3=”high speed opening of contacts” option4=”all of the above” correct=”option4″]

Detailed SolutionInterruption of large currents by relay requires