A. insulin
B. bitumen
C. varnish
D. no insulation is required
Related Mcqs:
- In aluminium conductors, steel core is provided to____________?
A. compensate for skin effect
B. neutralise proximity effect
C. reduce line inductance
D. increase the tensile strength - The steel used in steel cored conductors is usually__________?
A. alloy steel
B. stainless steel
C. mild steel
D. high speed steel
E. all of the above - The spacing between phase conductors of a 220 kV line is approximately equal to________________?
A. 2 m
B. 3.5 m
C. 6 m
D. 8.5 m - The use of strain type insulators is made where the conductors are__________?
A. dead ended
B. at intermediate anchor towers
C. any of the above
D. none of the above - _______________are the conductors, which connect the consumer’s terminals to the distribution?
A. Distributors
B. Service mains
C. Feeders
D. None of the above - If variable part of annual cost on account of interest and depreciation on the capital outlay is equal to the annual cost of electrical energy wasted in the conductors, the total annual cost will be minimum and the corresponding size of conductor will be most economical. This statement is known as___________________?
A. Kelvin’s law
B. Ohm’s law
C. Kirchhoffs law
D. Faraday’s law
E. none of the above - The material commonly used for insulation in high voltage cables is_______________?
A. lead
B. paper
C. rubber
D. none of the above - Aluminium has a specific gravity of___________?
A. 1.5
B. 2.7
C. 4.2
D. 7.8 - For aluminium, as compared to copper, all the following factors have higher values except:
A. specific volume
B. electrical conductivity
C. co-efficient of linear expansion
D. resistance per unit length for same cross-section - Galvanised steel wire is generally used as______________?
A. stay wire
B. earth wire
C. structural components
D. all of the above
