The energy radiated from a surface Q at absolute temperature T is related as__________________?
Correct answer: B. Q ∝ T4
- A. Q ∝ T2
- B. Q ∝ T4
- C. Q ∝ T3
- D. None of these
Explanation
The Stefan-Boltzmann law states that radiation from an ideal surface varies with the fourth power of absolute temperature, Q proportional to T⁴. Absolute temperature must be used, not Celsius temperature.
Report an error
The more specific you are, the faster it gets fixed. A source beats an opinion.
Prefer email? support@testustad.com
Practise Heat Transfer Operations
645 free Heat Transfer Operations MCQs from Chemical Engineering, each with the correct answer and an explanation. Unlimited attempts, no account needed.
Exams that ask Chemical Engineering questions like this
Chemical Engineering is on this paper prepared for on TestUstad, and all of them draw the same bank, so this question is worth knowing for it.
More Heat Transfer Operations questions
The purpose of providing a 'catchall' in the vapor line of an evaporator is to__________________?
Thermal conductivities of most of the liquids _______________ with rise in temperature?
Evaporation of 1kg of water from a solution in a single effect evaporator requires about ________________ kg of steam?
Absorptivity of a perfect black body is unity. Which of the following has maximum absorptivity ?
Steam condensate is recovered by steam traps and recycled for use as boiler feed water, because of its low___________________?
_______________ paint has the maximum absorption coefficient ?