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.Management Sciences
Category: Cables
Cables, generally used beyond 66 kV are___________?
A. oil filled
B. S.L. type
C. belted
D. armoured
The disadvantage with paper as insulating material is____________?
A. it is hygroscopic
B. it has high capacitance
C. it is an organic material
D. none of the above
In the cables, the location of fault is usually found out by comparing____________?
A. the resistance of the conductor
B. the inductance of conductors
C. the capacitances of insulated conductors
D. all above parameters
Conduit pipes are normally used to protect _______ cables
A. unsheathed cables
B. armoured
C. PVC sheathed cables
D. all of the above
Pressure cables are generally not used beyond__________?
A. 11 kV
B. 33 kV
C. 66 kV
D. 132 kV
The electrostatic stress in underground cables is_________?
A. same at the conductor and the sheath
B. minimum at the conductor and maximum at the sheath
C. maximum at the conductor and minimum at the sheath
D. zero at the conductor as well as on the sheath
E. none of the above
In a cable the voltage stress is maximum at____________?
A. sheath
B. insulator
E. surface of the conductor
D. core of the conductor
Empire tape is__________?
A. varnished cambric
B. vulcanised rubber
C. impregnated paper
D. none of the above
If the length of a cable is doubled, its capacitance____________?
A. becomes one-fourth
B. becomes one-half
C. becomes double
D. remains unchanged
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