Heat Transfer Operations Questions and Answers – Jacketed Vessels and Internal Coils

This set of Heat Transfer Operations Multiple Choice Questions & Answers (MCQs) focuses on “Jacketed Vessels and Internal Coils”.

1. Impellers are used to promote agitation and thoroughly mix the solution for maximum heat transfer rate (Forced Convection). Recognize this impeller.
The flat or pitched blades showed in figure is called Paddle Blades
a) Paddle blades
b) Propeller agitator
c) Simple turbine impeller
d) Helical ribbon impeller
View Answer

Answer: a
Explanation: The blades showed in figure is called Paddle Blades, these may be flat or pitched. At low speed the flat blades produce a tangential motion to the liquid and the pitched blades at high speed establish a radial flow pattern.

2. Impellers are used to promote agitation and thoroughly mix the solution for maximum heat transfer rate (Forced Convection). Recognize this impeller.
The impellers in figure resemble airplane propellers & called Propeller agitator
a) Paddle blades
b) Propeller agitator
c) Simple turbine impeller
d) Helical ribbon impeller
View Answer

Answer: b
Explanation: The impellers shown in figure resemble airplane propellers and are hence called Propeller agitator, these usually operate at high speed and produce an axial flow pattern in the liquid.

3. Impellers are used to promote agitation and thoroughly mix the solution for maximum heat transfer rate (Forced Convection). Recognize this impeller which operates at very high speed.
The figure shown represents Turbine mixers at high speed in low viscosity liquids
a) Paddle blades
b) Propeller agitator
c) Simple turbine impeller
d) Helical ribbon impeller
View Answer

Answer: c
Explanation: The figure shown represents Turbine mixers, which operate at high speed in low viscosity liquids. The blades may be flat or curved depending upon the operation whether we need axial or radial mixing.
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4. Recognise the Heat Exchanger given below.
The Heat Exchanger given is Dimpled Jacket in a particular direction
a) Internal Coil
b) Half Coil Jacketed Vessel
c) Dimpled Jacket
d) Conventional Jacketed Vessel
View Answer

Answer: c
Explanation: The Jacket installed outside the vessel is plain and has no breaks, it flows in a particular direction and baffles can be added, such arrangement is commonly known as Dimple Jacketed Vessel.

5. What is the name of the following setup?
Jacket in setup is installed outside vessel has dimples which provide turbulence to flow
a) Internal Coil
b) Half Coil Jacketed Vessel
c) Dimpled Jacket
d) Conventional Jacketed Vessel
View Answer

Answer: c
Explanation: The Jacket in the given setup is installed outside the vessel has dimples which provide turbulence to the flow, such arrangement is commonly known as Dimple Jacketed Vessel.
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6. Name the following Setup.
Half Coil Jacketed Vessel is installed outside vessel at certain instants between joining
a) Internal Coil
b) Half Coil Jacketed Vessel
c) Limpet Coil
d) Conventional Jacketed Vessel
View Answer

Answer: b
Explanation: The coil in the given setup is installed outside the vessel, and the coils break at certain instants between the joining, such arrangement is commonly known as Half Coil Jacketed Vessel.

7. What is the correct name for the following agitator?
The given figure is that of an Anchor Impeller operate at low speed
a) Helical ribbon impeller
b) Anchor Impeller
c) Simple turbine impeller
d) Paddle type impeller
View Answer

Answer: b
Explanation: The given figure is that of an Anchor Impeller. Anchor impellers usually operate at low speed, much of the disturbance within the liquid occurs close to the vessel wall.
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8. Name the following impeller.
The figure is that of a helical ribbon impeller achieved by the close clearances
a) Helical ribbon impeller
b) Anchor Impeller
c) Simple turbine impeller
d) Paddle type impeller
View Answer

Answer: a
Explanation: The figure is that of a helical ribbon impeller. In this setup, agitation at the wall is achieved by the close clearances between the blade and the wall surface and the helical design also imparts turbulence within the core of liquid.

9. What is the name of the following setup?
The coil in the given setup is installed inside the vessel called as Internal Coils
a) Internal Coil
b) Half Coil Jacketed Vessel
c) Limpet Coil
d) Conventional Jacketed Vessel
View Answer

Answer: a
Explanation: The coil in the given setup is installed inside the vessel, such arrangement is commonly known as Internal Coils.
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Sanfoundry Global Education & Learning Series – Heat Transfer Operations.

To practice all areas of Heat Transfer Operations, here is complete set of 1000+ Multiple Choice Questions and Answers.

If you find a mistake in question / option / answer, kindly take a screenshot and email to [email protected]

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Manish Bhojasia - Founder & CTO at Sanfoundry
Manish Bhojasia, a technology veteran with 20+ years @ Cisco & Wipro, is Founder and CTO at Sanfoundry. He lives in Bangalore, and focuses on development of Linux Kernel, SAN Technologies, Advanced C, Data Structures & Alogrithms. Stay connected with him at LinkedIn.

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