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Practice Test: Question Set - 08


1. Which of the following characteristics should the line supports for transmission lines possess?
    (A) Low cost
    (B) High mechanical strength
    (C) Longer life
    (D) All of the above

2. Large industrial consumers are supplied electrical energy at
    (A) 400 V
    (B) 11 kV
    (C) 66 kV
    (D) 400 kV

3. Multi-core cables generally use
    (A) Square conductors
    (B) Circular conductors
    (C) Rectangular conductors
    (D) None of the above

4. Galvanized steel wire is generally used as
    (A) Stay wire
    (B) Earth wire
    (C) Structural components
    (D) All of the above

5. The presence of ozone due to corona is harmful because it
    (A) Reduces power factor
    (B) Corrodes the material
    (C) Gives odour
    (D) Transfer energy to the ground

6. For aluminium, as compared to copper, all the following factors have higher values except
    (A) Specific volume
    (B) Electrical conductivity
    (C) Coefficient of linear expansion
    (D) Resistance per unit length for same cross-section

7. Electromechanical voltage regulators are generally used in
    (A) Reactors
    (B) Generators
    (C) Transformers
    (D) All of the above

8. In transmission lines the cross-arms are made of
    (A) Copper
    (B) Wood
    (C) R.C.C.
    (D) Steel

9. Distribution lines in India generally use
    (A) Wooden poles
    (B) R.C.C. poles
    (C) Steel towers
    (D) None of the above

10. By which of the following methods string efficiency can be improved?
    (A) Using a guard ring
    (B) Grading the insulator
    (C) Using long cross arm
    (D) Any of the above

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