Previous Year Very Short Questions of HT (DIPLOMA Mechanical Engineering (RAC) 5th)

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Heat Transfer

Previous year question paper with solutions for Heat Transfer

Our website provides solved previous year question paper for Heat Transfer . Doing preparation from the previous year question paper helps you to get good marks in exams. From our HT question paper bank, students can download solved previous year question paper. The solutions to these previous year question paper are very easy to understand.

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  1. The units for thermal conductivity of a material are __________.(W/mK / W/m2
  2. The electric current is analogous to ________.(heat flow rate/thermal temperature difference)
  3. Fourier’s law is applicable to_________(convection/conduction)
  4. The fin will be more useful if the effectiveness is _________ than 1.(greater/lesser)
  5. The emissivity for a black body is _______. (0.5/1)
  6. The ratio of inertia force/viscous force is known as_________number. (Reynold/Prandtl)
  7. The Energy (E) of the quantum is equal to________.(hxf or h+f)
  8. If the value of α = 1, the body is known as ________body.(Black/white)
  9. A surface for which emissivity is constant at all temperatures and throughout the entire range of wavelength is known as _______surface.( opaque/Grey)
  10. _________flow heat exchanger gives maximum rate of heat transfer for a given surface area. (Parallel/ counter)
  11. The heat conducted per unit time per unit area is known as___.(heat flux/heat transfer rate)
  12. The concept of heat transfer coefficient was introduced by_____.(Fourier/Newton)
  13. The electric current is analogous to ______.(heat flow rate/thermal temperature difference)
  14. Prandtl number is the ratio of _____ viscosity to the thermal diffusivity of the fluid.
  15. A composite wall refers to a wall of several _____ layers. (heterogeneous / homogeneous)
  16. The value of Reynold number for laminar flow is _____ than zero.(more/less)
  17. The free convection heat transfer is significantly affected by_____number. (Grashof/Nusselt)
  18. In high conducting material, the Bi is always ______than 1. (greater/lesser)
  19. The intensity of solar radiation on earth is _____KW/m². (1/10)
  20. surface for which emissivity is constant at all temperatures and throughout the entire range of wavelength is known as _____surface.(Grey/opaque)
  21. Convection is a mode of heat transfer which occurs in ------------------- and ---------------------
  22. In ----------------mode of heat transfer medium remains unaffected.
  23. A Pure metal has ----------------value of thermal conductivity than when it is impure.
  24. Thermal conductivity of fluids (gases/liquids) ----------------------with increase in temperature.
  25. Reynolds number determines whether fluid flow --------------or ---------------------.
  26. The magnitude of Stefan-Boltzmann constant (SI units) is -----------------.
  27. In a counter flow heat exchanger the hot and the cold fluids flow in the ------------------direction.
  28. A body that reflects all the incident radiations on it is known as ------------------.
  29. The mode of heat dissipation in the radiator of an automobile is --------------.
  30. In case of heat transfer the driving potential is the -----------------.