Q.1
The voltage regulation in magnetic amplifier type voltage regulator is effected by
Q.2
Constant voltage transmission entails the following disadvantage
Q.3
The voltage of the single phase supply to residential consumers is
Q.4
The wooden poles well impregnated with creosite oil or any preservative compound have life
Q.5
The material generally used for armour of high voltage cables is
Q.6
Which of the following bus-bar schemes has the lowest cost?
Q.7
For aluminium, as compared to copper, all the following factors have higher values except
Q.8
310 km line is considered as
Q.9
The use of strain type insulators is made where the conductors are
Q.10
As compared to a 2-wire D.C. distributor, a 3-wire distributor with same maximum voltage to earth uses only
Q.11
Due to which of the following reasons the cables should not be operated too hot?
Q.12
When an alternator connected to the bus-bar is shut down the bus-bar voltage will
Q.13
When a conductor carries more current on the surface as compared to core, it is due to
Q.14
When a live conductor of public electric supply breaks down and touches the earth which of the following will happen?
Q.15
The conductors of the overhead lines are
Q.16
jCorona usually occurs when the electrostatic stress in air around the conductor exceeds
Q.17
In a tap changing transformer, the tappings are provided on
Q.18
Galvanized steel wire is generally used as
Q.19
A circuit is disconnected by isolators when
Q.20
Large industrial consumers are supplied electrical energy at
Q.21
Multi-core cables generally use
Q.22
The corona is considerably affected by which of the following?
Q.23
A booster is a
Q.24
Which of the following are the constants of the transmission lines?
Q.25
Pin type insulators are generally not used for voltages beyond
Q.26
In the analysis of which of the following lines shunt capacitance is neglected?
Q.27
By which of the following a bus-bar is rated?
Q.28
Which of the following equipment, for regulating the voltage in distribution feeder, will be most economical?
Q.29
In a substation the following equipment is not installed
Q.30
Transmission voltage of ll kV is normally used for distances upto
0 h : 0 m : 1 s