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MCQs

Total Questions : 1935 | Page 3 of 194 pages
Question 21. The diagram factor is the ratio of the
  1.    Area of the actual indicator diagram to the area of theoretical indicator diagram
  2.    Actual workdone per stroke to the theoretical workdone per stroke
  3.    Actual mean effective pressure to the theoretical mean effective pressure
  4.    Any one of the above
 Discuss Question
Answer: Option D. -> Any one of the above
Question 22. Sublimation region is the region where
  1.    Solid and vapor phases are in equilibrium
  2.    Solid and liquid phases are in equilibrium
  3.    Liquid and vapor phases are in equilibrium
  4.    Solid, liquid and vapor phases are in equilibrium
 Discuss Question
Answer: Option A. -> Solid and vapor phases are in equilibrium
Question 23. In reaction turbines, the axial thrust is due to
  1.    Pressure drop across the rotor
  2.    Change in axial velocity
  3.    Both (A) and (B)
  4.    None of these
 Discuss Question
Answer: Option C. -> Both (A) and (B)
Question 24. Water tube boilers are
  1.    Internally fired
  2.    Externally fired
  3.    Internally as well as externally fired
  4.    None of these
 Discuss Question
Answer: Option B. -> Externally fired
Question 25. In a nozzle, whole frictional loss is assumed to occur between
  1.    Inlet and throat
  2.    Inlet and outlet
  3.    Throat and exit
  4.    All of these
 Discuss Question
Answer: Option C. -> Throat and exit
Question 26. Fire tube boilers are
  1.    Internally fired
  2.    Externally fired
  3.    Internally as well as externally fired
  4.    None of these
 Discuss Question
Answer: Option A. -> Internally fired
Question 27. The feed check valve is used in order to
  1.    Regulate flow of boiler water
  2.    Check level of water in boiler drum
  3.    Recirculate unwanted feed water
  4.    Allow high pressure feed water to flow to drum and not allow reverse flow to take place
 Discuss Question
Answer: Option D. -> Allow high pressure feed water to flow to drum and not allow reverse flow to take place
Question 28. The ratio of the volume at cut-off to the swept volume is called
  1.    Cut-off ratio
  2.    Expansion ratio
  3.    Clearance ratio
  4.    None of these
 Discuss Question
Answer: Option A. -> Cut-off ratio
Question 29. The ratio of the clearance volume to the swept volume is called
  1.    Cut-off ratio
  2.    Expansion ratio
  3.    Clearance ratio
  4.    None of these
 Discuss Question
Answer: Option C. -> Clearance ratio
Question 30. An impulse turbine as compared to a reaction turbine, for a given power has _________ row of blades.
  1.    Equal
  2.    Less
  3.    More
  4.    None of these
 Discuss Question
Answer: Option C. -> More

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