Heat Transfer by Convection-1 MCQ

Test your knowledge with important Heat Transfer by Convection-1 MCQ and their applications. These MCQs are beneficial for competitive exams too. Explore 30 + more Heat Transfer by Convection-1 MCQs at Bissoy

• Statement 1: Drop-wise condensation takes place on a smooth surface. Statement 2: All the resistance to heat transfer lies in the film formed during Film-type condensation.
  ক

  True, False

  খ

  True, True

  গ

  False, False

  ঘ

  False, True
• Statement 1: Film-type condensation has a higher heat transfer co-efficient than drop-wise condensation. Statement 2: Drop-wise condensation is easier to maintain than Film-type condensation
  ক

  True, False

  খ

  True, True

  গ

  False, False

  ঘ

  False, True
• The reciprocal of heat transfer co-efficient is _____
  ক

  Conductance

  খ

  Resistance

  গ

  Density

  ঘ

  Temperature difference
• Statement 1: hd/k is _____ Statement 2: _____ is the ratio of convective heat transfer to conductive heat transfer.
  ক

  Prandtl number, Prandtl number

  খ

  Nussel number, Nussel number

  গ

  Pictet number, Pictet number

  ঘ

  Fourier number, Fourier number
• Why is better to use a Jacketed vessel in the dairy industry than a stainless steel container directly?
  ক

  To prevent milk from charring

  খ

  To have a better temperature control

  গ

  The temperature of food in the film = temperature of the wall which is very high. Hence, jacketed vessels are needed

  ঘ

  All of the mentioned
• Statement 1: NPr= (Cp μ)/k Statement 2: If NPr is lesser than 1, Thermal Boundary layer is thinner than Hydrodynamic Boundary layer.
  ক

  True, False

  খ

  True, True

  গ

  False, False

  ঘ

  False, True
• Statement 1: When heat transfer takes between a solid surface and a fluid, an insulating film layer is formed. More is the agitation; more is the thickness of the film. Statement 2: Within the film, the temperature varies from the wall to the temperature of the bulk.
  ক

  True, False

  খ

  True, True

  গ

  False, False

  ঘ

  False, True
• Statement 1: Nucleate Boiling is when a layer of film is formed in the beginning. Statement 2: Boiling starts with the bottom layer which heats up, becomes light and goes up. That way everything becomes hot and there is not temperature difference and hence no heat transfer.
  ক

  True, False

  খ

  True, True

  গ

  False, False

  ঘ

  False, True
• __________ is when nucleate boiling transforms to film boiling.
  ক

  Critical temperature

  খ

  Leiden frost point

  গ

  Critical temperature & Leiden frost point

  ঘ

  None of the mentioned
• Which of the following is true about Natural Convection?
  ক

  Low heat transfer

  খ

  Due to gravity and natural buoyant forces

  গ

  Dependent on viscosity, density and thermal conductivity

  ঘ

  All of the mentioned