Related Questions

The local surface conductance for laminar film condensation on vertical surface is (where, t = film thickness)
A ∝ t
B ∝ $$\frac{1}{{\text{t}}}$$
C ∝ $$\sqrt {\text{t}} $$
D Independent of 't'
The heat transfer co-efficient in film type condensation is __________ that for dropwise condensation.
A Greater than
B Lower than
C Is same as
D Half
Dropwise condensation is promoted on a/an __________ surface.
A Glazed
B Oily
C Coated
D Smooth
The film thickness for laminar film condensation on vertical surface __________ from top to bottom.
A Cummulatively increases
B Cummulatively decreases
C Remains constant
D And the surface conductance increase
Dropwise condensation of steam on cooling surface is promoted
A An oily surface
B When both the steam and the tube are clean
C Only in presence of air
D None of these
The most conducive surface for dropwise condensation to occur is the __________ surface.
A Coated
B Oily
C Glazed & polished
D Smooth
Mr. Mamun bought 73 rolls of film. He can take 24 pictures with each roll of film. What is the total number of pictures he can take with 73 rolls of film ?
A 1,642
B 1,652
C 1,742
D 1,752
Which film has been awarded with best Environment film in 64th National film awards?
A Kassav
B Dashkriya
C Ventilator
D The tiger who crossed the line
Growth of __________ is promoted by the presence of manganese in water.
A Files
B Algae
C Micro-organisms
D Mosquitoes
Overall mass transfer co-efficient in case of absorption of __________ in water is based on the gas film co-efficient only, as the mass transfer process is gas film (phase) controlling.
A CO2
B SO2
C NH3
D None of these

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