Multiple Choice
A steam pipe is to be insulated by two insulating materials put over each other. For best results
A) better insulation should be put over pipe and better one over it
B) inferior insulation should be put over pipe and better one over it
C) both may be put in any order
D) whether to put inferior OIL over pipe or the better one would depend on steam temperature
E) uNPredictable.
Correct Answer:
Verified
Correct Answer:
Verified
Q2: Thermal diffusivity of a substance is<br>A)directly proportional
Q3: All radiations in a black body are<br>A)reflected<br>B)refracted<br>C)transmitted<br>D)absorbed<br>E)partly
Q4: The value of the wavelength for maximum
Q5: Joule sec is the unit of<br>A)universal gas
Q6: The thermal diffusivities for solids are generally<br>A)less
Q7: The unit of Stefan Boltzmann constant is<br>A)watt/cm<sup>2</sup>
Q8: LMTD in case of counter flow heat
Q9: Total emissivity of polished silver compared to
Q10: According to Stefan's law, the total radiation
Q11: Log mean temperature difference in case of