Electrical Engineering Objectives on Cables - Set 04 - ObjectiveBooks

Electrical Engineering Objectives on Cables - Set 04

Practice Test: Question Set - 04

1. Conduit pipes are normally used to protect ________ cables.
    (A) Unsheathed cables
    (B) Armoured
    (C) PVC sheathed cables
    (D) All of the above

2. Empire tape is
    (A) Varnished cambric
    (B) Vulcanized rubber
    (C) Impregnated paper
    (D) None of the above

3. The material for armouring on cable is usually
    (A) Steel tape
    (B) Galvanized steel wire
    (C) Any of the above
    (D) None of the above

4. Underground cables are laid at sufficient depth
    (A) To minimize temperature stresses
    (B) To avoid being unearthed easily due to removal of soil
    (C) To minimize the effect of shocks and vibrations due to gassing vehicles, etc.
    (D) For all of the above reasons

5. 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

6. Which of the following protects a cable against mechanical injury?
    (A) Bedding
    (B) Sheath
    (C) Armouring
    (D) None of the above

7. Rubber is most commonly used insulation in cables.
    (A) Yes
    (B) No

8. Cables, generally used beyond 66 kV are
    (A) Oil filled
    (B) S.L. type
    (C) Belted
    (D) Armoured

9. The thickness of the layer of insulation on the conductor, in cables, depends upon
    (A) Reactive power
    (B) Power factor
    (C) Voltage
    (D) Current carrying capacity

10. In capacitance grading of cables we use a _________ dielectric.
    (A) Composite
    (B) Porous
    (C) Homogeneous
    (D) Hygroscopic

11. Low tension cables are generally used up to
    (A) 200 V
    (B) 500 V
    (C) 700 V
    (D) 1000 V

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