Fouling factor is used

A In heat exchanger design as a safety factor
B In case of Newtonian fluids
C When a liquid exchanges heat with a gas
D None of the above

Correct Answer: In heat exchanger design as a safety factor

The fouling factor represents the theoretical resistance to heat flow due to a build-up of a layer of dirt or other fouling substance on the tube surfaces of the heat exchanger
Bissoy MCQ
#Mechanical Engineering #Heat And Mass Transfer

Related Questions

'Fouling factor' used in the design of a multipass shell and tube heat exchanger is a
A Non-dimensional factor
B Factor of safety
C Conversion factor for individual film heat transfer co-efficient to overall heat transfer co-efficient
D None of these
Fouling factor must be included in the calculation of over all design heat transfer coefficient, when the liquid
A Containing suspended solids flows at low velocity
B Containing suspended solids flows at high velocity
C Is highly viscous
D Is of high specific gravity
Fouling factor
A Is a dimensionless quantity
B Does not provide a safety factor for design
C Accounts for additional resistances to heat flow
D None of these
In SI units, fouling factor is expressed in
A m2°K/W
B W/m2°K
C m2°K
D m°K/W
The value of fouling factor depends upon the
A Characteristic of process fluid
B Velocity of process fluid containing suspended solids
C Suspended solids in the fluid
D All of the above
When one of the fluids is highly corrosive and has fouling tendency, it should
A Preferably flow inside the tube for its easier internal cleaning
B Perferably flow outside the tube
C Flow at a very slow velocity
D Flow outside the tube, when the flow is counter-current and inside the tube when the flow is co-current
Which is the best tube arrangement (in a shell and tube heat exchanger) if the fluids are clean and non-fouling?
A Square pitch
B Triangular pitch
C Diagonal square pitch
D None of these
If Q is load factor, S is shape factor and F is factor of safety in elastic design, the following:
A Q = S + F
B Q = S - F
C Q = F - S
D Q = S × F
Factor of safety (i.e., overdesign factor) in heat transfer equipments is about __________ percent more than the actual/theoretical design factor.
A 5-10
B 15-20
C 30-35
D 35-40
বুদ্ধির ক্ষেত্রে চালর্স স্পিয়ারম্যান কোন কোন ধরনের সামর্থ্যের কথা উল্লেখ করেছেন? i. e-factor ii. g-factor iii. s-factor নিচের কোনটি সঠিক?
A i ও ii
B i ও iii
C ii ও iii
D i, ii ও iii

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