Conductor Materials - MCQs with answers

Conductor Materials - MCQs with answers

Q1. Which among these is not the component of over head transmission lines?

a. Conductors
b. Cross arms
c. Danger plates
d. Transformers

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Q2. Which among these properties is not suited for the conductor material?

a. High electrical conductivity.
b. High specific gravity.
c. Lower cost.
d. High tensile strength.

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Q3. What is the empirical formula to calculate the number of strands?

a. 3n (n+2n) + 2
b. 3n (n+1) + 2
c. 3n (n+1) + 1
d. 3n (3+ 3n) + 1

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Q4. The most ideal material for the over head conductor is copper. What are the advantages of this?

a. Smaller cross sectional area.
b. Area offered by the wind loads is reduced.
c. The price of copper is less.
d. Both (a) and (b).

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Q5. Which among the following properties has got a higher value for aluminium in comparison to that of copper?

a. Electrical resistivity.
b. Melting point.
c. Thermal conductivity.
d. Specific gravity.

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Q6. Why are galvanised steel conductors not suitable for transmitting large power over long distance?

a. Poor conductivity.
b. High resistance of steel.
c. More power loss.
d. Both (a) and (b).

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Q7. Why are the conductors used for higher voltage transmission stranded?

a. Ease of handling.
b. Cheaper cost.
c. Reduced resistivity.
d. Increase in tensile strength.

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Q8. Which material is used for the manufacture of ground wire?

a. Aluminium.
b. Galvanised steel.
c. Cast iron.
d. Stainless steel.

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Q9. The following materials of line conductor are given.

i. Hard drawn copper.
ii. Cadmium copper.
iii. Aluminium.
iv. Galvanised steel.

What is the correct series in descending order of their electrical conductivities?

a. i, ii, iv, iii.
b. ii, i, iv, iii.
c. ii, i, iii, iv.
d. i, ii, iii, iv.

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