Q. Solar cells are made of

  • (A) silicon
  • (B) germanium
  • (C) silver
  • (D) aluminium
πŸ’¬ Discuss
βœ… Correct Answer: (A) silicon

Q. In case the supply frequency is reduced from 50 Hz to 1 Hz which method of heating will be least affected?

  • (A) Resistance heating
  • (B) Dielectric heating
  • (C) Induction heating
  • (D) All of the above
πŸ’¬ Discuss
βœ… Correct Answer: (A) Resistance heating

Q. Bottoming cycle in case of combined cycle power geneation is normally

  • (A) Gas turbine cycle
  • (B) Steam cycle
  • (C) any of the above
  • (D) None of the above
πŸ’¬ Discuss
βœ… Correct Answer: (B) Steam cycle

Q. The major disadvantage with solar cells for power generation is

  • (A) lack of availability
  • (B) large area requirement
  • (C) variable power
  • (D) high cost
πŸ’¬ Discuss
βœ… Correct Answer: (D) high cost

Q. Earth coal is

  • (A) lignite
  • (B) coal dust
  • (C) black earth
  • (D) wet coal
πŸ’¬ Discuss
βœ… Correct Answer: (A) lignite

Q. Barytes concrete is generally used in

  • (A) nuclear power plants
  • (B) construction of dams
  • (C) foundations for heavy equipment
  • (D) construction of cooling towers
πŸ’¬ Discuss
βœ… Correct Answer: (A) nuclear power plants

Q. The disadvantage of using solar evergy for power production is

  • (A) Requirements of large area for harnessing solar energy
  • (B) Energy available during day time only
  • (C) Energy not available during cloudy weather
  • (D) All of the above
πŸ’¬ Discuss
βœ… Correct Answer: (D) All of the above

Q. Chain gate stokers cannot be used for

  • (A) coal lumps
  • (B) low ash content coals
  • (C) high ash content coals
  • (D) None of the above
πŸ’¬ Discuss
βœ… Correct Answer: (C) high ash content coals

Q. Heat rate : Efficiency

  • (A) Coal : Oil
  • (B) Momentum : Variable cost
  • (C) Fixed cost : Variable cost
  • (D) Resistance : Conductance
πŸ’¬ Discuss
βœ… Correct Answer: (D) Resistance : Conductance

Q. Grade of the coal is the same as

  • (A) ultimate analysis
  • (B) proximate analysis
  • (C) orsat analysis
  • (D) rank
πŸ’¬ Discuss
βœ… Correct Answer: (D) rank

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