Electrical Engineering MCQs

Page No. 318

For aluminium, as compared to copper, all the following factors have higher values except:


aspecific volume


b electrical conductivity


cco-efficient of linear expansion


d resistance per unit length for same cross-section



For transmission of power over a distance of 200 km, the transmission voltage should be_________kv?


a132 kV


b66 kV


c33 kV


d11 kV


View Answer 132 kV

Aluminium has a specific gravity of___________?


a1.5


b2.7


c4.2


d7.8


View Answer 2.7

Pin type insulators are generally not used for voltages beyond_________?


a1 kV


b 11 kV


c22 kV


d33 kV


View Answer 33 kV

The current drawn by the line due to corona losses is___________?


anon-sinusoidal


b sinusoidal


ctriangular


dsquare


View Answer non-sinusoidal

The use of strain type insulators is made where the conductors are__________?


adead ended


bat intermediate anchor towers


cany of the above


done of the above


View Answer any of the above

The voltage drop, for constant voltage transmission is compensated by installing__________?


ainductors


bcapacitors


c synchronous motors


dall of above


View Answer synchronous motors

jCorona usually occurs when the electrostatic stress in air around the conductor exceeds?


a6.6 kV (r.m.s. value)/cm


b 11 kV (r.m.s. value)/cm


c22 kV (maximum value)/cm


d30 kV (maximum value)/cm



In a substation the following equipment is not installed?


aexciters


bseries capacitors


c shunt reactors


dvoltatre transformers


View Answer exciters

For which of the following equipment current rating is not necessary?


a Circuit breakers


bIsolators


cLoad break switch


dCircuit breakers and load break switches


View Answer Isolators

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