Home

A reduction in thermal resistance during heat transfer does not occur in the

A. Convection heat transfer by stirring the fluid and cleaning the heating surface

B. Conduction heat transfer by reduction in the material thickness and increase in the thermal conductivity

C. Radiation heat transfer by increasing the temperature and reducing the emissivity

D. None of these

Please do not use chat terms. Example: avoid using "grt" instead of "great".

You can do it
  1. In electrical resistance welding, distortion results from the use of improper
  2. The condition of diffraction from a crystal is given by
  3. Which of the following mainly decides the current to be employed is arc welding?
  4. Which of the following is resistant to the action of both heat & chemicals?
  5. In case of simple harmonic motion, displacement is proportional to the
  6. Pick out the wrong statement.
  7. The effect of friction on the flow of steam through a nozzle is to decrease the __________ of steam.
  8. Wrought iron is not
  9. What is the range of tempering temperature (°C) for most of the materials?
  10. Which of the following can be manufactured using powder metallurgy techniques?
  11. Liquor poisoning generally occurs due to the presence of __________ in it.
  12. Which of the following is the most suitable material of construction for the condenser tubes, where…
  13. Dislocation cross-slip is difficult in those materials, which have
  14. Annealing of cast iron
  15. For infinite parallel planes having emissivities ε1 & ε2, the interchange factor for radiation…
  16. Hardening of steel is not possible, unless it is heated __________ critical point.
  17. Which of the following material handling equipments is not suitable for moving materials in varying…
  18. Methyl orange indicator turns
  19. __________ glass is used in the mercury in glass thermometer meant for measuring a temperature of 500°C.
  20. Consumable electrodes are used in the __________ welding.
  21. Production of a hollow product by inflation of a tube or parison is called the __________ process.
  22. Dephosphorization of molten pig iron is favoured by
  23. Encyclopaedia of Chemical Technology has been
  24. Hot dipping process is used for coating a low melting point metal (e.g. Pb, Sn, Zn) on iron, steel &…
  25. Case hardening of a material is
  26. The amount of different substances produced, when the same quantity of electricity is passed through…
  27. Softening of hardened steel is done by its
  28. 'Cryogenics' is concerned with the generation & use of low temperature in the range of
  29. An abrupt and sudden fall in the reading of barometer is an indication of the
  30. Which of the following emissions in the exhaust gas of an I.C. engine causes the formation of photochemical…