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MCQs

Total Questions : 206 | Page 7 of 21 pages
Question 61. An aircraft gas turbine operates on
  1.    Sterling cycle
  2.    Bryton cycle
  3.    Rankine cycle
  4.    Otto cycle
 Discuss Question
Answer: Option B. -> Bryton cycle


Bryton cycle


Question 62. Super heated steam at 20 bar enters a nozzle, for maximum discharge the throat pressure should be
  1.    16 bar
  2.    10.92 bar
  3.    10 bar
  4.    11.6 bar
 Discuss Question
Answer: Option B. -> 10.92 bar


10.92 bar


Question 63. One of the following methods is adopted for governing of steam turbines in a power plant
  1.    hit and miss governing
  2.    blow off in boile
  3.    throtle governing
  4.    speed control
 Discuss Question
Answer: Option C. -> throtle governing


throtle governing


Question 64. For the purpose of comparison, the steam generating capacity of a boiler is generally expressed in terms of
  1.    equivalent evaporation
  2.    kg/hr
  3.    steam pressure
  4.    thermal efficiency
 Discuss Question
Answer: Option A. -> equivalent evaporation


equivalent evaporation


Question 65. In our state a super thermal power station is located at
  1.    Hyderabad
  2.    Vijayawada
  3.    Nellore
  4.    Ramagundam
 Discuss Question
Answer: Option D. -> Ramagundam


Ramagundam


Question 66. One of the following type of pumps is used in a diesel engine
  1.    jet pump
  2.    reciprocating pump
  3.    gear pump
  4.    axial flow pump
 Discuss Question
Answer: Option B. -> reciprocating pump


reciprocating pump


Question 67. The kinetic energy of a body of a mass 2kg, when it falls in air from rest through a height of 5 m is
  1.    98.1 J
  2.    9.8 Nm
  3.    10 n
  4.    20 j
 Discuss Question
Answer: Option A. -> 98.1 J


98.1 J


Question 68. The approximate air fuel ratio in a diesel engine under rated conditions is
  1.    12 to 1
  2.    20 to 1
  3.    15 to 11
  4.    80 to 1
 Discuss Question
Answer: Option B. -> 20 to 1


20 to 1


Question 69. Indicated thermal efficiency of an engine is
  1.    Brake power/Indicated power
  2.    Indicated power/Mechanical efficiency
  3.    Brake thermal efficiency/Mechanical efficiency
  4.    Brake power/Mechanical efficiency
 Discuss Question
Answer: Option C. -> Brake thermal efficiency/Mechanical efficiency


Brake thermal efficiency/Mechanical efficiency


Question 70. A 4 cylinder 4 stroke diesel engine has 3000 power strokes per minute; its speed in RPM is
  1.    3000
  2.    6000
  3.    750
  4.    1500
 Discuss Question
Answer: Option B. -> 6000


6000


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