Nozzle Efficiency MCQ

Test your knowledge with important Nozzle Efficiency MCQ and their applications. These MCQs are beneficial for competitive exams too. Explore 30+ more Nozzle Efficiency MCQs on Bissoy. Bissoy App

• Dry and saturated steam at 11 bar pressure enters a convergent-divergent nozzle and is discharged at 2 bar. Determine the actual enthalpy drop if he efficiency of the nozzle is 96%.
  ক

  254.56 kJ/kg

  খ

  321.32 kJ/kg

  গ

  288.14 kJ/kg

  ঘ

  245.63 kJ/kg
• Steam at 14 bar and 250°C enters a convergent-divergent steam nozzle and is discharged at 2 bar. Determine the nozzle efficiency if the velocity coefficient is 0.95. Neglect the initial velocity of steam.
  ক

  95.65%

  খ

  90.25%

  গ

  99.65%

  ঘ

  85.32%
• Presence of friction in a convergent-divergent nozzle, decreases the final velocity of the steam and increases the dryness fraction of the steam.
  ক

  True

  খ

  False
• Which of the following is NOT an effect of frictional loses in a convergent-divergent nozzle?
  ক

  Enthalpy drop is increased

  খ

  The expansion is not isentropic

  গ

  The final dryness fraction of the steam is increased

  ঘ

  The specific volume of steam is increased
• The final velocity obtained after passing the steam through a nozzle is less than the calculated one. Which of the following is NOT a valid reason for the same?
  ক

  Friction between steam and nozzle surface

  খ

  Steam not being superheated

  গ

  Shock loses

  ঘ

  Internal friction of steam