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MCQs

Total Questions : 222 | Page 20 of 23 pages
Question 191. The usual span with RCC Poles are
  1.    300-500 meters
  2.    40-50 meters
  3.    800-100 meters
  4.    60-100 meters
 Discuss Question
Answer: Option C. -> 800-100 meters
Question 192. Low voltage cables are meant for use up to
  1.    6.6 kV
  2.    11 kV
  3.    3.3 kV
  4.    1.1 kV
 Discuss Question
Answer: Option D. -> 1.1 kV
Question 193. Corona result in
  1.    Radio frequency
  2.    Power factor improvement
  3.    Better regulation
  4.    None of the listed here
 Discuss Question
Answer: Option A. -> Radio frequency
Question 194. When a conductor carries more current on the surface as compared to core, it is due to
  1.    Permeability variation
  2.    Unsymmetrical fault
  3.    Skin effect
  4.    Corona
 Discuss Question
Answer: Option C. -> Skin effect
Question 195. In transmission lines the cross-arms are made of
  1.    Steel
  2.    Wood
  3.    Copper
  4.    R.C.C.
 Discuss Question
Answer: Option A. -> Steel
Question 196. For transmission of power over a distance of 200 km, the transmission voltage should be
  1.    33 kV
  2.    11 kV
  3.    66 kV
  4.    132 kV
 Discuss Question
Answer: Option D. -> 132 kV
Question 197. In a D.C. 3-wire distribution system, balancer fields are cross-connected in order to
  1.    make both machine^ run as unloaded motors
  2.    boost the generated voltage
  3.    equalize voltages on the positive and negative outers
  4.    balance loads on both sides of the neutral
 Discuss Question
Answer: Option C. -> equalize voltages on the positive and negative outers
Question 198. The angular displacement between two interconnected stations is mainly due to
  1.    Armature reactance of both alternators
  2.    All of these
  3.    Synchronous reactance of both the alternators
  4.    Reactance of the interconnector
 Discuss Question
Answer: Option A. -> Armature reactance of both alternators
Question 199. The steel used in steel cored conductors is usually
  1.    Mild steel
  2.    High speed steel
  3.    Alloy steel
  4.    Stainless steel
 Discuss Question
Answer: Option A. -> Mild steel
Question 200. The underground system cannot be operated above
  1.    33 V
  2.    440 V
  3.    66 V
  4.    11 V
 Discuss Question
Answer: Option C. -> 66 V

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