Biot Number MCQ

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

• Identify the correct relation between Biot number and Fourier number
  ক

  4 b T = B I F 0

  খ

  2 b T = B I F 0

  গ

  3 b T = B I F 0

  ঘ

  b T = B I F 0
• Fourier number is given by
  ক

  α T/LC2

  খ

  2 α T/LC2

  গ

  3 α T/LC2

  ঘ

  4 α T/LC2
• For a plat plate (thickness δ, breadth b and height h) the heat exchange occurs from both the sides. The characteristics length is equal to
  ক

  δ/4

  খ

  δ/3

  গ

  δ/2

  ঘ

  δ
• The quantity h L C/k is known as
  ক

  Biot number

  খ

  Fourier number

  গ

  Stanton number

  ঘ

  Nusselt number
• During heat treatment, cylindrical pieces of 25 mm diameter, 30 mm height and at 30 degree Celsius are placed in a furnace at 750 degree Celsius with convective coefficient 80 W/m2 degree. Calculate the time required to heat the pieces to 600 degree Celsius. Assume the following property values Density = 7850 kg /m3 Specific heat = 480 J/kg K Conductivity = 40 W/m degree
  ক

  226 sec

  খ

  326 sec

  গ

  426 sec

  ঘ

  526 sec
• In the non-dimensional Biot number, the characteristics length is the ratio of
  ক

  Perimeter to surface area of solid

  খ

  Surface area to perimeter of solid

  গ

  Surface area to volume of solid

  ঘ

  Volume of solid to its surface area
• Lumped parameter analysis for transient heat conduction is essentially valid for
  ক

  B I < 0.1

  খ

  1 < B I < 10

  গ

  0.1 < B I < 0.5

  ঘ

  It tends to infinity
• Which of the following dimensionless number gives an indication of the ratio of internal (conduction) resistance to the surface (convective) resistance?
  ক

  Biot number

  খ

  Fourier number

  গ

  Stanton number

  ঘ

  Nusselt number
• In the lumped system parameter model, the variation of temperature with time is
  ক

  Linear

  খ

  Exponential

  গ

  Sinusoidal

  ঘ

  Cube
• A gold ring (k = 65 W/m K) measuring 15 * 10 * 60 cm is exposed to a surface where h = 11.5 W/m2 K. Find the value of biot number
  ক

  0.68

  খ

  0.58

  গ

  0.48

  ঘ

  0.38