Electrical Cables MCQs with Answers - Set 03 - ObjectiveBooks

Electrical Cables MCQs with Answers - Set 03

Practice Test: Question Set - 03

1. The insulating material for cables should
    (A) Be acid proof
    (B) Be non-inflammable
    (C) Be non-hygroscopic
    (D) Have all above properties

2. The insulating material for a cable should have
    (A) Low cost
    (B) High dielectric strength
    (C) High mechanical strength
    (D) All of the above

3. In cables the charging current
    (A) Lags the voltage by 90°
    (B) Leads the voltage by 90°
    (C) Lags the voltage by 180°
    (D) Leads the voltage by 180°

4. In capacitance grading a homogeneous dielectric is used.
    (A) Yes
    (B) No

5. The minimum dielectric stress in a cable is at
    (A) Armour
    (B) Bedding
    (C) Conductor surface
    (D) Lead sheath

6. In a cable immediately above metallic sheath ________ is provided.
    (A) Earthing connection
    (B) Bedding
    (C) Armouring
    (D) None of the above

7. The relative permittivity of rubber is
    (A) Between 2 and 3
    (B) Between 5 and 6
    (C) Between 8 and 10
    (D) Between 12 and 14

8. It is difficult to maintain oil filled cables.
    (A) Yes
    (B) No

9. Pressure cables are generally not used beyond
    (A) 11 kV
    (B) 33 kV
    (C) 66 kV
    (D) 132 kV

10. The current carrying capacity of cables in D.C. is more than that in A.C. mainly due to
    (A) Absence of harmonics
    (B) Nonexistence of any stability limit
    (C) Smaller dielectric loss
    (D) Absence of ripples

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