WorksheetsPower engineering II
Total questions: 10
Worksheet time: 2mins
Which type of insulator is used on 132 kV transmission lines?
Pin type.
suspension type
Shackle type
Pin and shackle type
Porcelain is produced by firing at high temperature of which all mixtures?
Kaolin
Feldspar
Quartz
All of these.
What is the dielectric strength of porcelain?
55 kV/cm
60 kV/cm
75 kV/cm
80 kV/cm
The number of discs in a string of insulators for 400 kV ac over head transmission line lies in the range of
32 – 33
22 – 23
15 – 16
9 – 10
What is the maximum voltage level upto which the pin type insulators can be used?
22 kV
33 kV
66 kV
132 kV
Assembly of which type of insulators are used as strain type of insulators?
Pin type
Shackle type.
Suspension type.
None of these.
Which type of insulators is mainly used for low voltage overhead lines?
Pin type
Shackle type
Suspension type
None of these.
Where is the suspension type of insulators mainly used?
RCC poles
Wooden poles.
Steel poles.
Steel towers
The voltage across the various discs of a string of suspension insulator having identical discs is different due to
Surface leakage currents.
Series capacitance
Shunt capacitance to ground
Series and shunt capacitance.
On what factor does the string efficiency of a string of suspension insulators dependent?
Size of the insulator
Number of discs in the string
Size of tower.
None of these.
