1. In Conventional Tube Fin HE, the fins are used on the _________ side.
a) Shell side
b) Tube side
c) Gas Side
d) Liquid side
Explanation: In Conventional Tube Fin HE, we decide to keep the fins on the gas side. The gas to be kept is decided by the designer, which maybe the tube side or the shell side.
2. Tube fin heat exchangers can withstand high pressure drop ________
a) On the tube side
b) On the shell side
c) On the side which has fins attached
d) On the opposite side of the fins
Explanation: The fins welded to the surface of the tube makes them mechanically very strong and capable to handle very high pressure drops on the tube side. We still should avoid pressure drops at the shell side as this may damage the fins.
3. Heat transfer in Agitated Vessels can be carried out by two methods they are ____________
a) Jacketed and Plates
b) Plates and Coils
c) Jacketed and Internal coils
d) Semi coils and Internal coils
Explanation: Heat Transfer in Agitated vessels is carried out by two methods either by external jackets or internal coils. Here jackets usually have lower heat transfer coefficient.
4. Which one of the following is not a type of jacket?
a) Full conventional jacket
b) Dimpled jacket
c) Coiled Jacket
d) Half-pipe jacket
Explanation: Jackets are usually classified as full conventional jacket, a dimpled jacket, or a half-pipe jacket, which is less useful in case of industries.
5. Which one of the following jacket is best suited for agitated vessels?
a) Full conventional jacket
b) Dimpled jacket
c) Coiled Jacket
d) Half-pipe jacket
Explanation: A conventional jacket is usually best suited as it covers the full wall and base surface and is very simple to construct.
6. Which jacket is used to provide better mechanical strength?
a) Full conventional jacket
b) Dimpled jacket
c) Coiled Jacket
d) Half-pipe jacket
Explanation: Dimpled jackets are made from light gauge metals which along with a high heat transfer rate also provide mechanical strength.
7. Which one of the following jacket is usually least preferred?
a) Full conventional jacket
b) Dimpled jacket
c) Coiled Jacket
d) Half-pipe jacket
Explanation: A half-pipe jacket is cheap and least used for a high pressure operation on service side. By using half-pipe jacket it will cover only limited amount of the surface.
8. Which Internal coil is the most frequently used one?
a) Full helical coils
b) Singlet Coil
c) Ringlet Coil
d) Semi helical coil
Explanation: A full helical coil is the one most commonly observed in industries due to the fact that it offers large surface area for heat transfer.
9. Why are full helical coils so common in industries?
a) Provides Large Surface area
b) Mechanically stable
c) Very cheap to install
d) Handles highly corrosive substances
Explanation: A full helical coil is the one most commonly observed in industries due to the fact that it offers large surface area for heat transfer, but the problem with it is that needs mechanical support and providing a flange is usually expensive.
10. Ringlet Coils have a disadvantage, what is it?
a) Provides Less Surface area
b) Mechanically unstable
c) Very expensive to install
d) Leaves unmixed areas
Explanation: Ringlet coils are cheap, provide suitable surface area, can be inserted into the vessels easily but the only disadvantage it has is that it leaves unmixed areas in the vessel