Miscellaneous In Metallurgy MCQ

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• Nusselt number/Biot number varies
  ক

  inversely with thermal conductivity

  খ

  directly with heat transfer co-efficient

  গ

  directly with thermal conductivity

  ঘ

  inversely with dimension of the solid
• The ratio of the shear stress to the principal stress on a principal plane is
  ক

  0

  খ

  1

  গ

  $$\frac{1}{2}$$

  ঘ

  $$\frac{1}{3}$$
• Reynolds number is the ratio of
  ক

  inertia forces to viscous forces

  খ

  inertia forces to buoyancy forces

  গ

  viscous forces to buoyancy forces

  ঘ

  viscous forces to surface tension
• A thermally thin body is the one for which
  ক

  Biot number is less than 0.1

  খ

  Galileo number is less than 0.1

  গ

  Fourier number is less than 0.1

  ঘ

  Fourier number is greater than 0.1