Multiple Choice
The radiation heat flux from a heating element at a temperature of 800°C, in a furnace maintained at 300°C is 8 kW/m2 . The flux, when the element temperature is increased to 1000°C for the same furnace temperature is
A) 11.2 kW/m2
B) 12.0 kW/m2
C) 14.6 kW/m2
D) 16.5 kW/m2
Correct Answer:
Verified
Correct Answer:
Verified
Q47: Air is to be heated by condensing
Q48: The Stefan-Boltzmann constant depends on the<br>A)Medium<br>B)Temperature<br>C)Surface<br>D)None of
Q49: The unit of heat transfer co-efficient is<br>A)BTU/hr.
Q50: With increase in temperature, the thermal conductivity
Q51: Prandtl number is the ratio of<br>A)Momentum diffusivity
Q53: A body cools down from 75°C to
Q54: Temperature profile in steady state heat transfer
Q55: In an interphase heat transfer process, the
Q56: Colburn analogy is applicable for the value
Q57: Natural convection is characterised by<br>A)Grashoff number<br>B)Peclet number<br>C)Reynolds