Compressible Flow through Diffusers MCQ

Test your knowledge with important Compressible Flow through Diffusers MCQ and their applications. These MCQs are beneficial for competitive exams too. Explore 30 + more Compressible Flow through Diffusers MCQs at Bissoy

• How is diffuser throat area At2 related to the nozzle throat area At1?
  ক

  At2 = At1

  খ

  At2 > At1

  গ

  At2 < At1

  ঘ

  At2 At1 = 1
• What is the diffuser efficiency for hypersonic conditions?
  ক

  ηD = 1

  খ

  ηD > 1

  গ

  ηD < 1

  ঘ

  ηD = 1/2
• Which of these factors contribute to additional total pressure losses inside the oblique shock diffuser?
  ক

  Abrupt change of convergent – divergent sections

  খ

  Shock wave interaction with walls

  গ

  Isentropic flow

  ঘ

  Presence of normal shock
• How is the flow compressed in an ideal supersonic wind tunnel inside a diffuser?
  ক

  Isentropic

  খ

  Adibatic

  গ

  Isochoric

  ঘ

  Isobaric
• Normal shock diffuser is more efficient than the oblique shock diffuser.
  ক

  True

  খ

  False
• What is the relation between the entry and exit entropy of an actual supersonic diffuser?
  ক

  s1 = s2

  খ

  s1 > s2

  গ

  s1 < s2

  ঘ

  s1 s2 = 1
• Which of these results in decrease of the flow inside the actual supersonic diffuser?
  ক

  Test section

  খ

  Convergent nature

  গ

  Divergent nature

  ঘ

  Shock waves
• Which of these processes is involved in slowing down the air inside the subsonic diffuser?
  ক

  Adiabatic compression

  খ

  Adiabatic expansion

  গ

  Isentropic expansion

  ঘ

  Isothermal compression
• Why is ideal supersonic diffuser not feasible?
  ক

  Presence of shock waves

  খ

  Varying cross – sectional area

  গ

  Varying throat area

  ঘ

  Choked flow
• Which of these properties remain constant in the ideal isentropic supersonic diffuser?
  ক

  Total pressure

  খ

  Velocity

  গ

  Mach number

  ঘ

  Mass flow
• Diffuser is only applicable for incoming subsonic flow.
  ক

  True

  খ

  False
• What is the role of the diffuser?
  ক

  Increase the flow velocity after test section

  খ

  Decrease the flow velocity after test section

  গ

  Increase the flow velocity inside test section

  ঘ

  Decrease the flow velocity inside the test section