Project ForgeHeat Transfer
Convection
GATE 2013
Medium
In a pool boiling experiment, the following phenomena were observed: P. Natural convection, Q. Film boiling, R. Transition boiling, S. Nucleate boiling. What was the CORRECT sequence of their occurrence?
- AP, Q, R, S
- BS, R, Q, P
- CQ, R, P, S
- P, S, R, Q
Explanation
As wall superheat (ΔT) increases from zero, the boiling curve progresses: natural convection (P, no bubbles) → nucleate boiling (S, bubble formation, highest heat flux) → transition boiling (R, unstable vapor film forming, heat flux decreasing) → film boiling (Q, stable vapor blanket). Sequence: P, S, R, Q.
Source: GATE CH 2013 (2013)
This question is part of a 15-day revision cycle — sign in and Project Forge will bring it back the day before you'd forget it.