__________ of air does not increase with increase in temperature.

A. Density

B. Thermal diffusivity

C. Viscosity

D. Thermal conductivity

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  1. In connection with corrosion of metals, passivation is the process that
  2. Wrought iron is never shaped by
  3. Heat transfer by __________ is almost absent in case of fluidised bed drying operation.
  4. Triple point of water is
  5. The trace metal present in insulin is
  6. The activity of pure hydrogen gas at 1000°C and 5 atm pressure
  7. Lead is poured into the joints between two __________ pipes.
  8. A reduction in thermal resistance during heat transfer does not occur in the
  9. Specific gravity of a metal, which weighs 5 kg in air and 4 kg when submerged in water, will be
  10. A thin, flat & square plate measuring 2 m × 2 m is freely hanging in ambient air at 25°C.…
  11. Hydro-cyclone is a
  12. Air/fuel ratio on molar (volume) basis for combustion of methane with theoretical quantity of air with…
  13. Which of the following is an example of stress corrosion?
  14. __________ is used for tying the steel columns to concrete foundation.
  15. Eutectoid composition of carbon steel at room temperature is
  16. In case of brasses, with decreasing zinc percentage and increasing copper percentage, its __________…
  17. Tesla metre per ampere (T. m/A) is the unit for the measurement of
  18. The stress at which extension of the material takes place more rapidly as compared to the increase in…
  19. Dielectric
  20. The same volume of all gases is representative of their
  21. Maximum amount of thermal radiation is emitted at all wavelengths at any specified temperature by a/an…
  22. An approximately __________ process exemplifies the flow of a gas through a very long pipe of uniform…
  23. The ability of tool steel to resist softening at high temperatures is termed as __________ hardness.
  24. Use of flux during soldering is done to
  25. With increase in temperature, the electrical conductivity of a __________ decreases.
  26. Out of the following, the joint produced by __________ has the lowest strength.
  27. Pick out the wrong statement.
  28. The taper provided on pattern for its easy & clean withdrawal from the mould is termed as the __________…
  29. __________ of test specimens is not involved in any hardness testing method.
  30. Elimination of brittleness resulting from welding of saw blades is done by __________ of the welded…