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This quiz contains multiple-choice problems on the construction and operation of shell and tube heat exchangers, log mean temperature, shell side diameter, concurrent and countercurrent operations, pressure drop calculations, heat transfer area, tube diameter, length and tube arrangements.
The use of baffles in shell-and-tube heat exchangers increases pressure drop. True or false?
True
False
How many ways can we classify shell-and-tube heat exchangers based on flow patterns?
1
2
3
4
Which of the following has the maximum log mean temperature difference for a shell-and-tube heat exchanger?
Counter flow
Parallel flow
Cross flow
Split flow
What baffle types exist for a shell-and-tube heat exchanger?
Cross baffle, split baffle and segmental baffle
Counter baffle, doughnut baffle and cross baffle
Orifice baffle, segmental baffle and doughnut baffle
Orifice baffle, segmental baffle and counter baffle
Which one of the following is not a baffle type for heat transfer in shell-and-tube heat exchangers?
Segmental
Orifice
Doughnut
Divided
What pitch arrangement types are available for baffle usage in shell-and-tube heat exchangers?
Square and rectangular pitches
Square and triangular pitches
Rectangular and hexagonal pitches
Hexagonal and triangular pitches
When phase change occurs in one of the fluids, it is preferred to be kept at the shell side. True or false?
True
False
Which of the following fluids cannot be placed at the shell side?
Condensing Vapour
Fluid with very high temperature
Fluid with very high pressure
Fluid with high viscosity
Which of the following fluids cannot be placed at the tube side?
Fouling fluid
Cooling liquid
Corrosive fluid
Highly viscous
When the fluid is very viscous, we can
Keep it in shell side
Keep it in tube side
Keep it in any side
Not use it
To calculate the temperature difference in a shell-and-tube heat exchanger, we use
LMTD
Mean temperature difference
Median of the temperature difference
Square mean of the temperature difference
What should be the minimum value of the correction factor to get multiplied by LMTD?
> 1
< 2
< 1
> 2
What should be the minimum value of LMTD correction factor F for the steady-state operation of the equipment?
< 0.5
<1
1 > F > 0.75
1 > F > 0.5
In a shell-and-tube heat exchanger, fluid enters the inner side at 15℃ and leaves at 65℃. The shell has steam at 1atm. What is the value of corrected LMTD and correction factor?
39℃, F = 0
56.35℃, F = 0
70℃, F = 1
56.35℃, F = 1
Which of the following has log mean temperature difference for corrected LMTD of a shell-and-tube heat exchanger?
Counter flow
Parallel flow
Cross flow
Split flow
