Rubber is most commonly used insulation in cables
Rubber is most commonly used insulation in cables
A. Yes
B. No
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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 aboveThe material for armouring on cable is usually__________?
The material for armouring on cable is usually__________?A. steel tape
B. galvanised steel wire
C. any of the above
D. none of the aboveSolid type cables are considered unreliable beyond 66 kV because___________?
Solid type cables are considered unreliable beyond 66 kV because___________?A. insulation may melt due to higher temperature
B. skin effect dominates on the conductor
C. of corona loss between conductor and sheath material
D. there is a danger of breakdown of insulation due to the presence of voidsThe 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 aboveDielectric 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/mmA cable carrying alternating current has__________?
A cable carrying alternating current has__________?A. hysteresis losses only
B. hysteresis and leakage losses only
C. hysteresis, leakage and copper losses only
D. hysteresis, leakage, copper and friction losses