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.Management Sciences
Category: Cables
Capacitance grading of cable implies__________?
A. use of dielectrics of different permeabilities
B. grading according to capacitance of cables per km length
C. cables using single dielectric in different concentrations
D. capacitance required to be introduced at different lengths to counter the effect of inductance
E. none of the above
In a cable immediately above metallic sheath ______ is provided
A. earthing connection
B. bedding
C. armouring
D. none of the above
In cables the charging current__________?
A. lags the voltage by 90°
B. leads the voltage by 90°
C. lags the voltage by 180°
D. leads the voltage by 180°
In a cable, the maximum stress under operating conditions is at___________?
A. insulation layer
B. sheath
C. armour
D. conductor surface
High tension cables are generally used up to_____________?
A. 11kV
B. 33kV
C. 66 kV
D. 132 kV
cables are used for 132 kV lines____________?
A. High tension
B. Super tension
C. Extra high tension
D. Extra super voltage
The advantage of oil filled cables is_________?
A. more perfect impregnation
B. smaller overall size
C. no ionisation, oxidation and formation of voids
D. all of the above
The breakdown voltage of a cable depends on_____________?
A. presence of moisture
B. working temperature
C. time of application of the voltage
D. all of the above
The surge resistance of cable is__________?
A. 5 ohms
B. 20 ohms
C. 50 ohms
D. 100 ohms
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