The GATE Grind

GATE 2023 CH – Question 21

Heat Transfer · Convection, boundary layers and heat transfer coefficients · 1 mark · Multiple choice

Match the quantities in Group 1 with their units in Group 2 listed in the table below.

Group 1Group 2
P) Thermal conductivityI) W m$^{-2}$K$^{-1}$
Q) Convective heat transfer coefficientII) W m$^{-1}$K$^{-1}$
R) Stefan-Boltzmann constantIII) W K$^{-1}$
S) Heat capacity rateIV) W m$^{-2}$K$^{-4}$
  1. P-II, Q-I, R-IV, S-III
  2. P-I, Q-II, R-III, S-IV
  3. P-III, Q-IV, R-II, S-I
  4. P-IV, Q-I, R-III, S-II

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Show answer and explanation

Correct answer: (A) P-II, Q-I, R-IV, S-III

Explanation

Thermal conductivity is in W m⁻¹ K⁻¹ (II). The convective heat transfer coefficient is in W m⁻² K⁻¹ (I). The Stefan-Boltzmann constant is in W m⁻² K⁻⁴ (IV). The heat capacity rate $\dot{m}c_p$ is in W K⁻¹ (III).