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Interview Q/A

Q1. Baffles advantage disadvantage

▶️ Advantage

 . Provide support to tube bundles

. Proper distribution of flow

. Increase heat transfer coefficient

Disadvantage-

Increase pressure drop


Q2. How velocity increase with increase in tube pass.?

▶️


Q3. Counter or co which flow is better

▶️Counter is better because for same heat duty we have to use less area

Lmtd value for counter is always more than co


Q4. Why we use LMTD temp

▶️ temperature difference that takes place across the heat exchanger from entrance to exit is not linear. Therefore we use lmtd. 


Q5. What is fin and it’s application

▶️fins are surfaces that extend from an object to increase the rate of heat transfer to or from the environment by increasing convection. . 

Application- radiator in car

Heat exchanger

Graphic cards etc


Q6. Conduction convection and radiation which is most used in industry

▶️convection


Q 7. Which type of fluid is used in shell and tube

▶️In shell-condensing vapour

In tube – corrosive fluid

               Cooling water

                High pressure steam


Q 8. Type of valves

▶️ gate valve, globe valve, needle valve, check valve, butterfly valve, pinch valve etc. 


Q9. Needle valve application

▶️They can be used for almost any clean gas or fluid. One of the most commonly used location for needle valves is to monitor gas flow, like propane, in a system. A propane needle valve


Q10. Which valve used for gases

▶️. Needle valve , gate valve, safety valve etc.

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