Heat Transfer Operations Mock Test 3

10%

Question 1 of 10

1. The Heat Transfer Coefficient remains constant throughout the surface of the fin.

False

True

Question 1 of 10

Question 2 of 10

2. The Fanning friction factor ________ on adding Fins.

Decreases

Very large change beyond measure

Remains the same

Increases

Question 2 of 10

Question 3 of 10

3. What are the three parts of Extended Surface heat exchangers when it is classified based on flow pattern?

Compound flow, Plate Fin and Cross Counter Flow

Compound flow, Tube Fin and Plate Fin

Compound flow, Tube Fin and Cross Counter Flow

Compound flow, Cross Parallel and Cross Counter Flow

Question 3 of 10

Question 4 of 10

4. Compound flow Fins extended surface heat exchangers are classification based on______

Phase pattern

Heat transfer mechanism

Flow pattern

Construction

Question 4 of 10

Question 5 of 10

5. Why are agitated vessels usually used in batch manufacture?

Necessary to calculate the time to heat or cool a batch

It avoids harmful reactions

It supports endothermic reactions

Because batch processes occur in vessels

Question 5 of 10

Question 6 of 10

6. Recognize the following baffle arrangement

Doughnut Segment

Double Segmental

Segmental

Triple Segmental

Question 6 of 10

Question 7 of 10

7. What is the number of baffles in the shell side if the baffle spacing is 6cm and Length of the setup is 90cm?

Question 7 of 10

Question 8 of 10

8. Consider we have a shell and tube Heat Exchanger, with the inner tube of diameter 30mm (neglect thickness) and shell of diameter 100mm. We have two fluids A & B (both with viscosity 2.5×10^-5Pa-s), we desire to have their flow rates as 4 Kg/s(tube) and 5.3 Kg/s(shell) respectively. What is the Friction Factor (F) for this setup for the shell if it has triangular pitch with Pitch = 40mm?

0.0086

0.00103

0.086

0.0103

Question 8 of 10

Question 9 of 10

9. If there are N shell passes in a shell and tube HE, then which one of the following relation is correct foe the pressure drop a shell side?

\((\frac{FL}{D}+4×N)\frac{v^2ρ}{2}\)

\((\frac{4FL}{D}+4×N)\frac{v^2ρ}{2}\)

\((\frac{4FL}{D}+N)\frac{v^2ρ}{2}\)

\((\frac{FL}{D}+N)\frac{v^2ρ}{2}\)