Related Questions

The electricity bill of a certain establishment is partially fixed and partially varies as the number of units of electricity consumed. Wen in a certain month 540 units are sonsumed. the bill is TK 1800. In another month 620 units are consumed are the bill is Tk 2040. Inayet another month if 500 units are consumed what would be the bill (in Tk) for that month?
A 1950
B 1560
C 1840
D 1680
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
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
'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
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
If machine A polishes x units in 12 minutes and machine B polishes 5x units in 40 minutes, in how many minutes will A and B. working together, polish 50x units?
A 240
B 300
C 350
D 120
দুইটি বিপরীতমুখী বলদ্বয়ের লব্ধি 12 units এবং বলদ্বয় হতে যথাক্রমে 3 units এবং 4 units দূরে ক্রিয়াশীল। বলদ্বয়ের মান কত?
A 48 and 36 units
B 48 and 48 units
C 40 and 36 units
D 40 and 40 units
A machine can produce 10 units in 5 hours. Another machine can produce 5 units in 10 hours. Working together, how many units can they produce in 30 hours?
A 50 units
B 60 units
C 70 units
D 80 units
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

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