A. avoid excessive sheath losses
B. make it flexible
C. either of the above
D. none of the above
✅ The correct answer is option A.
Cables MCQs
2. 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
✅ The correct answer is option C.
3. The advantage of cables over overhead transmission lines is___________?
A. easy maintenance
B. low cost
C. can be used in congested areas
D. can be used in high voltage circuits
✅ The correct answer is option C.
4. 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
✅ The correct answer is option C.
5. The minimum dielectric stress in a cable is at_____________?
A. armour
B. bedding
C. conductor surface
D. lead sheath
✅ The correct answer is option D.
6. The surge resistance of cable is__________?
A. 5 ohms
B. 20 ohms
C. 50 ohms
D. 100 ohms
✅ The correct answer is option C.
7. The insulation of the cable decreases with__________?
A. the increase in length of the insulation
B. the decrease in the length of the insulation
C. either A. or (b)
D. none of the above
✅ The correct answer is option A.
8. 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
✅ The correct answer is option B.
9. Cables, generally used beyond 66 kV are___________?
A. oil filled
B. S.L. type
C. belted
D. armoured
✅ The correct answer is option A.
10. Low tension cables are generally used up to___________?
A. 200 V
B. 500 V
C. 700 V
D. 1000 V
✅ The correct answer is option D.