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MCQs

Total Questions : 164 | Page 5 of 17 pages
Question 41. A closed cycle gas turbine gives __________ efficiency as compared to an open cycle gas turbine.
  1.    same
  2.    lower
  3.    higher
  4.    None of these
 Discuss Question
Answer: Option C. -> higher
Answer: (c).higher
Question 42. Gas turbine as compared to steam turbine
  1.    requires less space for installation
  2.    has compressor and combustion chamber
  3.    has less efficiency
  4.    all of these
 Discuss Question
Answer: Option D. -> all of these
Answer: (d).all of these
Question 43. Free air is the air at atmospheric conditions at any specific location.
  1.    True
  2.    False
  3.    Can't say
  4.    None of these
 Discuss Question
Answer: Option A. -> True
Answer: (a).True
Question 44. Intercooling in gas turbines
  1.    decreases net output but increases thermal efficiency
  2.    increases net output but decreases thermal efficiency
  3.    decreases net output and thermal efficiency both
  4.    increases net output and thermal efficiency both
 Discuss Question
Answer: Option B. -> increases net output but decreases thermal efficiency
Answer: (b).increases net output but decreases thermal efficiency
Question 45. When the temperature of air leaving the intercooler, in a two stage compression with intercooler, is __________ the original atmospheric air temperature, then the intercooling is known as perfect or complete intercooling.
  1.    equal to
  2.    less than
  3.    more than
  4.    None of these
 Discuss Question
Answer: Option A. -> equal to
Answer: (a).equal to
Question 46. A gas turbine used in air-craft should have low weight and small frontal area.
  1.    Correct
  2.    Incorrect
  3.    Can't say
  4.    None of these
 Discuss Question
Answer: Option A. -> Correct
Answer: (a).Correct
Question 47. A closed cycle gas turbine works on
  1.    Carnot cycle
  2.    Rankine cycle
  3.    Ericsson cycle
  4.    Joule cycle
 Discuss Question
Answer: Option D. -> Joule cycle
Answer: (d).Joule cycle
Question 48. The clearance, in a single stage, single acting reciprocating air compressor does not effect the workdone on the air and the power required for compressing the air.
  1.    True
  2.    False
  3.    Can't say
  4.    None of these
 Discuss Question
Answer: Option A. -> True
Answer: (a).True
Question 49. Air motors work on the cycle which is the reverse of the reciprocating air compressor cycle.
  1.    Agree
  2.    Disagree
  3.    Can't say
  4.    None of these
 Discuss Question
Answer: Option A. -> Agree
Answer: (a).Agree
Question 50. Which of the following statement is correct relating to rocket engines ?
  1.    The combustion chamber in a rocket engine is directly analogous to the reservoir of a super sonic wind tunnel
  2.    The stagnation conditions exist at the combustion chamber
  3.    The exit velocities of exhaust gases are much higher than those in jet engine
  4.    all of the above
 Discuss Question
Answer: Option D. -> all of the above
Answer: (d).all of the above

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