Top 150+ Solved Switch Gear and Protection MCQ Questions Answer

a. Substations

b. Capacitor bank

c. Induction motor

d. Generators.

a. Voltage at the faulty point

b. Total impedance up to the fault

c. Both (A) and (B) above

d. None of the above

a. Simplified design of earth fault protection

b. Over-voltages due to lightning can be discharged to the earth

c. Freedom from persistent arcing grounds

d. all of the above.

a. Lightning

b. Switching

c. Resonance

d. Any of the above.

a. Use of surge diverters

b. Low tower footing resistance

c. Use of overhead ground wires

d. Any of the above.

a. Low temperature gas

b. High temperature gas

c. Dissociated gas

d. Plasma.

a. Thermal ionization of gas

b. Thermal emission from surface of contacts

c. Field emission from the surface of contacts

d. Any of the above.

a. Isolator

b. Limit switch

c. Earthling switch

d. All of the above.

a. It is non-toxic gas

b. It is non-inflammable

c. It has density 5 times that of air at 200C

d. It has dark yellow color.

a. Gas cylinders

b. Liquid form in cylinders

c. Solid form in boxes

d. Air cylinders.

a. Decomposes into S and F ions

b. Decomposes into SF4and SF2

c. Gets oxidized

d. Reduces to SF3.

a. less than that of air at atmospheric pressure

b. less than that of oil used in OCB

c. more than that of oil used in OCB

d. More at lower pressure and low at higher pressures.

a. Sealing problem of gas

b. In flux of moisture in the gas system is dangerous

c. Deterioration of quality of circuit breaker affects reliability of circuit breaker

d. All of the above.