Transmission and Distribution

In the analysis of which of the following lines shunt capacitance is neglected?

A. Short transmission lines
B. Medium transmission lines
C. Long transmission lines
D. Medium as well as long transmission lines

For transmission of power over a distance of 500 km, the transmission voltage should be in the range?

A. 150 to 220 kV
B. 100 to 120 kV
C. 60 to 100 kV
D. 20 to 50 kV

The effect of corona can be detected by___________?

A. presence of ozone detected by odour
B. hissing sound
C. faint luminous glow of bluish colour
D. all of the above

On which of the following factors skin effect depends?

A. Frequency of the current
B. Size of the conductor
C. Resistivity of the conductor material
D. All of the above

Constant voltage transmission entails the following disadvantage?

A. large conductor area is required for same power transmission
B. short-circuit current of the system is increased
C. either of the above
D. none of the above

In a tap changing transformer, the tapgs are provided on__________?

A. primary winding
B. secondary winding
C. high voltage winding
D. any of the above

Which of the following equipment, for regulating the voltage in distribution feeder, will be most economical?

A. Static condenser
B. Synchronous condenser
C. Tap changing transformer
D. Booster transformer

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

A. specific volume
B. electrical conductivity
C. co-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?

A. 132 kV
B. 66 kV
C. 33 kV
D. 11 kV

Aluminium has a specific gravity of___________?

A. 1.5
B. 2.7
C. 4.2
D. 7.8