Related Questions

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 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
The most conducive surface for dropwise condensation to occur is the __________ surface.
A Coated
B Oily
C Glazed & polished
D Smooth
Dropwise condensation occurs on __________ surfaces.
A Clean and dirt free
B Smooth clean
C Contaminated cooling
D Polished
Film condensation is promoted on a/an __________ surface.
A Oily
B Coated
C Clean & smooth
D Dirty
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 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
Growth of __________ is promoted by the presence of manganese in water.
A Files
B Algae
C Micro-organisms
D Mosquitoes
In a group of 60 probationary officers, 40% of them were promoted, 12 of them were terminated and rest to them were placed on probation for the second time. What percent of the probationary officers were placed on probation for the second time ?
A 60
B 50
C 40
D 30
The young man was quickly promoted when his employers saw how ___ he was.
A indigent
B indifferent
C assiduous
D lethargic

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