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MCQs

Total Questions : 222 | Page 1 of 23 pages
Question 1. Which of the following materials is not used for transmission and distribution of electrical power?
  1.    Copper
  2.    Aluminium
  3.    Steel
  4.    Tungsten
 Discuss Question
Answer: Option D. -> Tungsten
Question 2. The steel used in steel cored conductors is usually
  1.    Alloy steel
  2.    Stainless steel
  3.    Mild steel
  4.    High speed steel
 Discuss Question
Answer: Option C. -> Mild steel
Question 3. For transmission of power over a distance of 200 km, the transmission voltage should be
  1.    132 kV
  2.    66 kV
  3.    33 kV
  4.    11 kV
 Discuss Question
Answer: Option A. -> 132 kV
Question 4. In a D.C. 3-wire distribution system, balancer fields are cross-connected in order to
  1.    boost the generated voltage
  2.    balance loads on both sides of the neutral
  3.    make both machine^ run as unloaded motors
  4.    equalize voltages on the positive and negative outers
 Discuss Question
Answer: Option D. -> equalize voltages on the positive and negative outers
Question 5. The angular displacement between two interconnected stations is mainly due to
  1.    Armature reactance of both alternators
  2.    Reactance of the interconnector
  3.    Synchronous reactance of both the alternators
  4.    All of the above
 Discuss Question
Answer: Option A. -> Armature reactance of both alternators
Question 6. Which of the following is not a constituent for making porcelain insulators?
  1.    Quartz
  2.    Kaolin
  3.    Felspar
  4.    Silica
 Discuss Question
Answer: Option D. -> Silica
Question 7. In transmission lines the cross-arms are made of
  1.    Copper
  2.    Wood
  3.    R.C.C.
  4.    Steel
 Discuss Question
Answer: Option D. -> Steel
Question 8. For transmission of power over a distance of 500 km, the transmission voltage should be in the range
  1.    150 to 220 kV
  2.    100 to 120 kV
  3.    60 to 100 kV
  4.    20 to 50 kV
 Discuss Question
Answer: Option A. -> 150 to 220 kV
Question 9. The underground system cannot be operated above
  1.    440 V
  2.    11 V
  3.    33 V
  4.    66 V
 Discuss Question
Answer: Option D. -> 66 V
Question 10. Which of the following D.C. distribution system is the simplest and lowest in first cost?
  1.    Radial system
  2.    Ring system
  3.    Interconnected system
  4.    None of the above
 Discuss Question
Answer: Option A. -> Radial system

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