1
1.74
6.1
37
✅ The correct answer is option C.
Heat Transfer MCQs
132. To reduce the tube side pressure drop for the same flow rate, the heat exchanger recomended is
1-2 heat exchanger
1-1 heat exchanger
3-2 heat exchanger
2-4 heat exchanger
✅ The correct answer is option B.
133. During crystallisation, formation of crystal can occur in __________ solution only.
Saturated
Supersaturated
Undersaturated
All of the above
✅ The correct answer is option B.
134. Electro-magnetic spectrum range, which is important for radiation varies from __________ microns.
1 to 100
0.5 to 50
10 to 100
100 to 1000
✅ The correct answer is option B.
135. Evaporation by thermocompression results in the
Saving of steam
Realisation of multiple effect economy in a single effect
Both A and B
None of these
✅ The correct answer is option C.
136. The steam ejector is used to
Remove condensate from the steam pipelines
Create vacuum
Superheat the steam
None of these
✅ The correct answer is option B.
137. The left face of a one dimensional slab of thickness 0.2 m is maintained at 80°C and the right face is exposed to air at 30°C. The thermal conductivity of the slab is 1.2 W/m.K and the heat transfer co-efficient from the right face is 10 W/m².K. At steady state, the temperature of the right face in °C is
77.2
71.2
63.8
48.7
✅ The correct answer is option D.
138. In the free convection regime of pool boiling, the heat flux is proportional to
Δt1/2
Δt2
Δt5/4
Δt
✅ The correct answer is option C.
139. In a parallel flow heat exchanger, if the outlet temperature of hot and cold fluids are the same, then the log mean temperature difference (LMTD) is
Minimum
Maximum
Zero
Infinity
✅ The correct answer is option C.
140. In case of __________ boiling, the liquid temperature is below the saturation temperature and the boiling takes place in the vicinity of the heated surface.
Nucleate
Local
Pool
Saturated
✅ The correct answer is option B.