A. low cost
B. high dielectric strength
C. high mechanical strength
D. all of the above
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 - If a power cable and a communication cable are to run parallel the minimum distance between the two, to avoid interference, should be______________?
A. 2 cm
B. 10 cm
C. 50 cm
D. 400 cm - The insulating material for cables should____________?
A. be acid proof
B. be non-inflammable
C. be non-hygroscopic
D. have all above properties - 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 - The insulating material should have____________?
A. low permittivity
B. high resistivity
C. high dielectric strength
D. all of the above - The material for armouring on cable is usually__________?
A. steel tape
B. galvanised steel wire
C. any of the above
D. none of the above - The minimum dielectric stress in a cable is at_____________?
A. armour
B. bedding
C. conductor surface
D. lead sheath - The surge resistance of cable is__________?
A. 5 ohms
B. 20 ohms
C. 50 ohms
D. 100 ohms - The breakdown of insulation of the cable can be avoided economically by the use of___________?
A. inter-sheaths
B. insulating materials with different dielectric constants
C. both (A) and (B)
D. none of the above - Is a cable is to be designed for use on 1000 kV, which insulation would you prefer ____________?
A. Polyvinyle chloride
B. Vulcanised rubber
C. Impregnated paper
D. Compressed SFe gas
E. none of the above
