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MCQs

Total Questions : 70 | Page 6 of 7 pages
Question 51. The ratio of exit pressure to inlet pressure for maximum mass flow rate per unit area of steam through a nozzle when steam is initially dry saturated is
  1.    0.6
  2.    0.578
  3.    0.555
  4.    0.5457
 Discuss Question
Answer: Option B. -> 0.578
Question 52. Load carrying capacity of belt conveyor is about
  1.    20 to 40 tonnes/hr
  2.    50 to 100 tonnes/hr
  3.    100 to 150 tonnes/hr
  4.    150 to 200 tonnes/hr
 Discuss Question
Answer: Option B. -> 50 to 100 tonnes/hr
Question 53. The proper indication of incomplete combustion is
  1.    high CO content in flue gases at exit
  2.    high CO2 content in flue gases at exit
  3.    high temperature of flue gases
  4.    the smoking exhaust from chimney
 Discuss Question
Answer: Option A. -> high CO content in flue gases at exit
Question 54. Load center in a power station is
  1.    Center of coal fields
  2.    Center of maximum load of equipments
  3.    Center of gravity of electrical system
  4.    None of the above
 Discuss Question
Answer: Option C. -> Center of gravity of electrical system
Question 55. In case of impulse steam turbine
  1.    there is enthalpy drop in fixed and moving blades
  2.    there is enthalpy drop only in moving blades
  3.    there is enthalpy drop in nozzles
  4.    none of the above
 Discuss Question
Answer: Option C. -> there is enthalpy drop in nozzles
Question 56. The percentage O2 by Weight in atmospheric air is
  1.    18%
  2.    23%
  3.    77%
  4.    79%
 Discuss Question
Answer: Option B. -> 23%
Question 57. Solar thermal power generation can be achieved by
  1.    using focusing collector or heliostates
  2.    using flat plate collectors
  3.    using a solar pond
  4.    any of the above system
 Discuss Question
Answer: Option D. -> any of the above system
Question 58. The modern steam turbines are
  1.    impulse turbines
  2.    reaction turbines
  3.    impulse-reaction turbines
  4.    none of the above
 Discuss Question
Answer: Option C. -> impulse-reaction turbines
Question 59. The capacity of large turbo-generators varies from
  1.    20 to 100 MW
  2.    50 to 300 MW
  3.    70 to 400 MW
  4.    100 to 650 MW
 Discuss Question
Answer: Option B. -> 50 to 300 MW
Question 60. The efficiency of chimney is approximately
  1.    80%
  2.    40%
  3.    20%
  4.    0.25%
 Discuss Question
Answer: Option D. -> 0.25%

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