Electrical Cables MCQ - Set 02 - ObjectiveBooks

Electrical Cables MCQ - Set 02

Practice Test: Question Set - 02

1. 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

2. The thickness of metallic shielding on cables is usually
    (A) 0.04 mm
    (B) 0.2 to 0.4 mm
    (C) 3 to 5 mm
    (D) 40 to 60 mm

3. The bedding on a cable consists of
    (A) Hessian cloth
    (B) Jute
    (C) Any of the above
    (D) None of the above

4. _________ cables are used for 132 kV lines.
    (A) High tension
    (B) Super tension
    (C) Extra high tension
    (D) Extra super voltage

5. Natural rubber is obtained from milky sap of tropical trees.
    (A) Yes
    (B) No

6. PVC stands for
    (A) Polyvinyl chloride
    (B) Post varnish conductor
    (C) Pressed and varnished cloth
    (D) Positive voltage conductor

7. 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

8. Capacitance grading of cable implies
    (A) Use of dielectrics of different permeabilities
    (B) Grading according to capacitance of cables per km length
    (C) Cables using single dielectric in different concentrations
    (D) Capacitance required to be introduced at different lengths to counter the effect of inductance

9. The metallic sheath may be made of lead or lead alloy or of aluminum.
    (A) Yes
    (B) No

10. High tension cables are generally used up to
    (A) 11 kV
    (B) 33 kV
    (C) 66 kV
    (D) 132 kV

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