PT317_DAY3_065_HEAT TRANSFER

How many types of shell and tube heat exchangers are there?

• 1

• 2

• 3

• 4

What is the most common type of heat exchanger?

• Shell and tube heat exchanger

• Reboiler

• Extended surface heat exchanger

• Both 1 and 3

No. of passes are included to increase

• Amount of heat

• Total surface area

• Amount of feed

• No. Of tubes

In 2-4 type heat exchanger, 4 denotes

• No. Of tubes

• No. Of shells

• No. Of tube side pass

• No. Of shell side pass

Baffles are used to

• Make the system more stable

• Guide the hot fluid

• Both 1 and 2

In distribution chamber, what is pumped out?

• Feed

• Hot fluid

• Both 1 and 2

When no. of passes are increased

• Total surface area is increased

• Total amount of heat transfer is increased

• Both 1 and 2

U=1/(1/hi+Ai/A0h0), here Ai/A0h0 is

• Overall heat transfer coefficient

• Bounday layer coefficient

• Thermal resistance for hot fluid

• Thermal resistance for feed

Tube walls are made thin to

• Decrease boundary layer

• Increase surface area

• Decrease resistance offered by metal wall

• Increase amount of heat

In extended surface heat exchanger, fins are added to

• Increase the surface area of the outer side of the tube

• Make the system more stable

• Guide the flow of hot fluid