A. between 2 and 3
B. between 5 and 6
C. between 8 and 10
D. between 12 and 14
Related Mcqs:
- A certain cable has an insulation of relative permittivity 4. If the insulation is replaced by one of relative permittivity 2, the capacitance of the cable will become_____________?
A. one half
B. double
C. four times
D. none of the above - Dielectric strength of rubber is around____________?
A. 5 kV/mm
B. 15 kV/mm
C. 30 kV/mm
D. 200 kV/mm - Natural rubber is obtained from milky sap of tropical trees
A. Yes
B. No - Rubber is most commonly used insulation in cables
A. Yes
B. No - 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 case of three core flexible cable the colour of the neutral is_________?
A. blue
B. black
C. brown
D. none of the above - 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 - Conduit pipes are normally used to protect _______ cables
A. unsheathed cables
B. armoured
C. PVC sheathed cables
D. all of the above - If a cable of homogeneous insulation has a maximum stress of 10 kV/mm, then the dielectric strength of insulation should be_______________?
A. 5 kV/mm
B. 10 kV/mm
A. 15 kV/mm
D. 30 kV/mm - Cables for 220 kV lines are invariably____________?
A. mica insulated
B. paper insulated
C. compressed oil or compressed gas insulated
D. rubber insulated
E. none of the above
