Cables, generally used beyond 66 kV are___________?
A. oil filled
B. S.L. type
C. belted
D. armoured
Cables
Low tension cables are generally used up to___________?
Low tension cables are generally used up to___________?
A. 200 V
B. 500 V
C. 700 V
D. 1000 V
High tension cables are generally used up to_____________?
High tension cables are generally used up to_____________?
A. 11kV
B. 33kV
C. 66 kV
D. 132 kV
Dielectric strength of rubber is around____________?
Dielectric strength of rubber is around____________?
A. 5 kV/mm
B. 15 kV/mm
C. 30 kV/mm
D. 200 kV/mm
In a cable, the maximum stress under operating conditions is at___________?
In a cable, the maximum stress under operating conditions is at___________?
A. insulation layer
B. sheath
C. armour
D. conductor surface
In case of three core flexible cable the colour of the neutral is_________?
In case of three core flexible cable the colour of the neutral is_________?
A. blue
B. black
C. brown
D. none of the above
In single core cables armouring is not done to________?
In single core cables armouring is not done to________?
A. avoid excessive sheath losses
B. make it flexible
C. either of the above
D. none of the above
The insulating material for cables should____________?
The insulating material for cables should____________?
A. be acid proof
B. be non-inflammable
C. be non-hygroscopic
D. have all above properties
The current carrying capacity of cables in D.C. is more than that in A.C. mainly due to__________?
The current carrying capacity of cables in D.C. is more than that in A.C. mainly due to__________?
A. absence of harmonics
B. non-existence of any stability limit
C. smaller dielectric loss
D. absence of ripples
E. none of the above
cables are used for 132 kV lines____________?
cables are used for 132 kV lines____________?
A. High tension
B. Super tension
C. Extra high tension
D. Extra super voltage