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MCQs

Total Questions : 164 | Page 9 of 17 pages
Question 81. The advantage of oil filled cables is
  1.    More perfect impregnation
  2.    All of the listed here
  3.    Smaller overall size
  4.    No ionization, oxidation and formation of voids
 Discuss Question
Answer: Option B. -> All of the listed here
Question 82. The insulation of the cable decreases with
  1.    The increase in length of the insulation
  2.    Both of the listed here
  3.    The decrease in the length of the insulation
  4.    None of the listed here
 Discuss Question
Answer: Option A. -> The increase in length of the insulation
Question 83. Copper as conductor for cables is used as
  1.    Annealed
  2.    Alloy with chromium
  3.    Hardened and tempered
  4.    Hard drawn
 Discuss Question
Answer: Option A. -> Annealed
Question 84. The thickness of metallic shielding on cables is usually
  1.    3 to 5 mm
  2.    40 to 60 mm
  3.    0.2 to 0.4 mm
  4.    0.04 mm
 Discuss Question
Answer: Option A. -> 3 to 5 mm
Question 85. In case of three core flexible cable the color of the neutral is
  1.    Blue
  2.    Black
  3.    Red
  4.    Brown
 Discuss Question
Answer: Option A. -> Blue
Question 86. The minimum dielectric stress in a cable is at
  1.    Conductor surface
  2.    Lead sheath
  3.    Armour
  4.    Bedding
 Discuss Question
Answer: Option B. -> Lead sheath
Question 87. A cable carrying alternating current has
  1.    Hysteresis losses only
  2.    Hysteresis and leakage losses only
  3.    Hysteresis, leakage and copper losses only
  4.    Hysteresis, leakage, copper and friction losses
 Discuss Question
Answer: Option B. -> Hysteresis and leakage losses only
Question 88. Low tension cables are generally used up to
  1.    1000 V
  2.    400 V
  3.    600 V
  4.    200 V
 Discuss Question
Answer: Option A. -> 1000 V
Question 89. The breakdown voltage of a cable depends on
  1.    Time of application of the voltage
  2.    All of the listed here
  3.    Presence of moisture
  4.    Working temperature
 Discuss Question
Answer: Option B. -> All of the listed here
Question 90. In a cable, the maximum stress under operating conditions is at
  1.    Insulation layer
  2.    Conductor surface
  3.    Sheath
  4.    Armour
 Discuss Question
Answer: Option B. -> Conductor surface

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