A. more perfect impregnation
B. smaller overall size
C. no ionisation, oxidation and formation of voids
D. all of the above
The advantage of oil filled cables is_________? Read More »
Cables A. annealed
B. hardened and tempered
C. hard drawn
D. alloy with chromium
Copper as conductor for cables is used as________? Read More »
Cables A. mica insulated
B. paper insulated
C. compressed oil or compressed gas insulated
D. rubber insulated
E. none of the above
Cables for 220 kV lines are invariably____________? Read More »
Cables A. 2 cm
B. 10 cm
C. 50 cm
D. 400 cm
A. low permittivity
B. high resistivity
C. high dielectric strength
D. all of the above
The insulating material should have____________? Read More »
Cables A. it is hygroscopic
B. it has high capacitance
C. it is an organic material
D. none of the above
The disadvantage with paper as insulating material is____________? Read More »
Cables A. Yes
B. No
Rubber is most commonly used insulation in cables Read More »
Cables A. Yes
B. No
In capacitance grading a homogeneous dielectric is used Read More »
Cables A. Yes
B. No
Natural rubber is obtained from milky sap of tropical trees Read More »
Cables A. Yes
B. No
Polyethylene has very poor dielectric and ageing properties Read More »
Cables