When vaporisation takes place directly at the heating surface, it is called________________?
Correct answer: B. Nucleate boiling
- A. Film boiling
- B. Nucleate boiling
- C. Vapour binding
- D. None of these
Explanation
In nucleate boiling, vapour bubbles form directly at the heated surface and detach into the liquid. In film boiling, a continuous vapour layer separates the liquid from the surface, so it is not the described condition.
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
As per Kirchoff‟s law, the ratio of the total radiating power to the absorptivity of a body depends on the_______________?
Fourier's law applies to the heat transfer by__________________?
Heat produced when a steady state current, I passes through an electrical conductor having resistance, 'R' is___________________?
Thermal conductivity of a conducting solid material depends upon its_______________?
Extended heat transfer surface like fins are used to increase the heat transfer rate. Fin efficiency is defined as the ratio of heat transferred across the fin surface to the theoretical heat transfer across an equal area held at the________________?
The actual temperature drop across the heating surface in an evaporator depends on the_________________?