MCQOPTIONS

Explore topic-wise MCQs in Heat Transfer Operations.

This section includes 11 Mcqs, each offering curated multiple-choice questions to sharpen your Heat Transfer Operations knowledge and support exam preparation. Choose a topic below to get started.

1.	Why do we divide the temperature-enthalpy relationship of a mixture into zones?
A.	To calculate LMTD for each zone
B.	To calculate Tsat TLIQUID for each
C.	To calculate resistance for each
D.	To make the solving process easier
Answer» B. To calculate Tsat TLIQUID for each

2.	The temperature-enthalpy relationship of a mixture represents the coolant flow in __________
A.	Single phase
B.	Double phase
C.	Triple phase
D.	Any phase possible
Answer» B. Double phase

3.	Which one of the following is the correct labelling of the temperature-enthalpy relationship curve of a mixture?
A.	<a href="https://www.sanfoundry.com/wp-content/uploads/2019/10/heat-transfer-operations-questions-answers-temperature-enthalpy-diagrams-q9a.png"><img alt="The temperature-enthalpy relationship curve of a mixture - option a" class="alignnone size-full wp-image-248496" height="240" src="https://www.sanfoundry.com/wp-content/uploads/2019/10/heat-transfer-operations-questions-answers-temperature-enthalpy-diagrams-q9a.png" width="252"/></a>
B.	<a href="https://www.sanfoundry.com/wp-content/uploads/2019/10/heat-transfer-operations-questions-answers-temperature-enthalpy-diagrams-q9b.png"><img alt="The temperature-enthalpy relationship curve of a mixture - option b" class="alignnone size-full wp-image-248497" height="237" src="https://www.sanfoundry.com/wp-content/uploads/2019/10/heat-transfer-operations-questions-answers-temperature-enthalpy-diagrams-q9b.png" width="243"/></a>
C.	<a href="https://www.sanfoundry.com/wp-content/uploads/2019/10/heat-transfer-operations-questions-answers-temperature-enthalpy-diagrams-q9c.png"><img alt="The temperature-enthalpy relationship curve of a mixture - option c" class="alignnone size-full wp-image-248498" height="240" src="https://www.sanfoundry.com/wp-content/uploads/2019/10/heat-transfer-operations-questions-answers-temperature-enthalpy-diagrams-q9c.png" width="246"/></a>
D.	<a href="https://www.sanfoundry.com/wp-content/uploads/2019/10/heat-transfer-operations-questions-answers-temperature-enthalpy-diagrams-q9d.png"><img alt="The temperature-enthalpy relationship curve of a mixture - option d" class="alignnone size-full wp-image-248499" height="245" src="https://www.sanfoundry.com/wp-content/uploads/2019/10/heat-transfer-operations-questions-answers-temperature-enthalpy-diagrams-q9d.png" width="238"/></a>
Answer» D. <a href="https://www.sanfoundry.com/wp-content/uploads/2019/10/heat-transfer-operations-questions-answers-temperature-enthalpy-diagrams-q9d.png"><img alt="The temperature-enthalpy relationship curve of a mixture - option d" class="alignnone size-full wp-image-248499" height="245" src="https://www.sanfoundry.com/wp-content/uploads/2019/10/heat-transfer-operations-questions-answers-temperature-enthalpy-diagrams-q9d.png" width="238"/></a>

4.	Which one of the following statement is correct about the temperature-enthalpy relationship of a mixture?
A.	Sub-cooled at the entrance
B.	Sub-heated at the entrance
C.	Superheated at the entrance
D.	Superheated at the exit
Answer» D. Superheated at the exit

5.	Which one of the following plot correctly represents the temperature-enthalpy relationship of a mixture?
A.	<a href="https://www.sanfoundry.com/wp-content/uploads/2019/10/heat-transfer-operations-questions-answers-temperature-enthalpy-diagrams-q7a.png"><img alt="Plot correctly represents the temperature-enthalpy relationship of a mixture - option a" class="alignnone size-full wp-image-248492" height="237" src="https://www.sanfoundry.com/wp-content/uploads/2019/10/heat-transfer-operations-questions-answers-temperature-enthalpy-diagrams-q7a.png" width="256"/></a>
B.	<a href="https://www.sanfoundry.com/wp-content/uploads/2019/10/heat-transfer-operations-questions-answers-temperature-enthalpy-diagrams-q7b.png"><img alt="Plot correctly represents the temperature-enthalpy relationship of a mixture - option b" class="alignnone size-full wp-image-248493" height="236" src="https://www.sanfoundry.com/wp-content/uploads/2019/10/heat-transfer-operations-questions-answers-temperature-enthalpy-diagrams-q7b.png" width="243"/></a>
C.	<a href="https://www.sanfoundry.com/wp-content/uploads/2019/10/heat-transfer-operations-questions-answers-temperature-enthalpy-diagrams-q7c.png"><img alt="Plot correctly represents the temperature-enthalpy relationship of a mixture - option c" class="alignnone size-full wp-image-248494" height="238" src="https://www.sanfoundry.com/wp-content/uploads/2019/10/heat-transfer-operations-questions-answers-temperature-enthalpy-diagrams-q7c.png" width="243"/></a>
D.	<a href="https://www.sanfoundry.com/wp-content/uploads/2019/10/heat-transfer-operations-questions-answers-temperature-enthalpy-diagrams-q7d.png"><img alt="Plot correctly represents the temperature-enthalpy relationship of a mixture - option d" class="alignnone size-full wp-image-248495" height="233" src="https://www.sanfoundry.com/wp-content/uploads/2019/10/heat-transfer-operations-questions-answers-temperature-enthalpy-diagrams-q7d.png" width="239"/></a>
Answer» B. <a href="https://www.sanfoundry.com/wp-content/uploads/2019/10/heat-transfer-operations-questions-answers-temperature-enthalpy-diagrams-q7b.png"><img alt="Plot correctly represents the temperature-enthalpy relationship of a mixture - option b" class="alignnone size-full wp-image-248493" height="236" src="https://www.sanfoundry.com/wp-content/uploads/2019/10/heat-transfer-operations-questions-answers-temperature-enthalpy-diagrams-q7b.png" width="243"/></a>

6.	In condensation from mixtures, with or without a non-condensing gas, the assumptions underlying the logarithmic mean temperature difference (LMTD) are invalid, so what is the method that we can adopt to cope with this problem?
A.	Zonal Distribution
B.	Taking linear groups of enthalpy curves for LMTD calculations
C.	Apply LMTD anyway
D.	Apply average LMTD
Answer» C. Apply LMTD anyway

7.	In condensation from mixtures, with or without a non-condensing gas, then the assumptions underlying the logarithmic mean temperature difference (LMTD) are valid.
A.	True
B.	False
Answer» C.

8.	The thermal design of condenser is therefore considerably ___________ than that of a single-phase heat exchanger.
A.	Same
B.	More complicated
C.	Less complicated
D.	Not relatable
Answer» C. Less complicated

9.	With condensation occurring in fluid mixtures which might be having a non-condensing gas, the variation of the equilibrium temperature with enthalpy can be a _________ function.
A.	Linear
B.	Non-Linear
C.	Quadratic
D.	Parabolic
Answer» C. Quadratic

10.	If the coolant is single-phase, and if the overall heat transfer coefficient is reasonably constant, then the formula for the area of the condenser can be ________
A.	A= ( dot{Q}/U Delta T_{LMTD} )
B.	A= ( dot{Q}/U Delta T_{LMTD} )
C.	A= ( dot{Q}/U Delta T_{LMTD} )
D.	A= ( dot{Q}/U Delta T_{LMTD} )
Answer» C. A= ( dot{Q}/U Delta T_{LMTD} )

11.	If the coolant is not in multiple-phase, and if the overall heat transfer coefficient is constant, then the assumptions underlying the logarithmic mean temperature difference (LMTD) __________
A.	Are Valid
B.	Are Invalid
C.	Not all but some are valid
D.	Single assumption invalid
Answer» B. Are Invalid