Question is ⇒ Pick out the correct statement about the condensation., Options are ⇒ (A) Filmwise condensation gives a lower heat transfer rate than the dropwise condensation., (B) Suitable coating or vapour additive is used to promote film wise condensation., (C) If a condensing liquid does not wet the surface dropwise, even then condensation will take place on it., (D) Reynolds number of condensing liquid is based on its mass flow rate., (E) , Leave your comments or Download question paper.

Question is ⇒ Pick out the correct statement about the condensation., Options are ⇒ (A) Filmwise condensation gives a lower heat transfer rate than the dropwise condensation., (B) Suitable coating or vapour additive is used to promote film wise condensation., (C) If a condensing liquid does not wet the surface dropwise, even then condensation will take place on it., (D) Reynolds number of condensing liquid is based on its mass flow rate., (E) , Leave your comments or Download question paper. Previous question Next question


Q1.	Pick out the correct statement about the condensation.
A.	Filmwise condensation gives a lower heat transfer rate than the dropwise condensation. [Wrong Answer]
B.	Suitable coating or vapour additive is used to promote film wise condensation. [Correct Answer]
C.	If a condensing liquid does not wet the surface dropwise, even then condensation will take place on it. [Wrong Answer]
D.	Reynolds number of condensing liquid is based on its mass flow rate. [Wrong Answer]
View Answer 1 -1 Explanation:- Answer : B Discuss it below : !! OOPS Login [Click here] is required to post your answer/result Help other students, write article, leave your comments

Previous question Next question

Also Read Similar Questions Below :

⇒ The primary strengthening mechanism in 70 : 30 brass is the
solid solution strengthening.
precipitation hardening.
dispersion strengthening.
order hardening.

⇒ Ultimate strength in tension as compared to that in shear for steel is
half
one third
one and half times
one fourth

⇒ Which is the most lethal weapon ?
Atom (fusion) bomb
Hydrogen bomb
Cobalt bomb
Neutron bomb

⇒ The taper provided on pattern for its easy & clean withdrawal from the mould is termed as the __________ allowance.
casting
pattern
draft
distoration

⇒ Unit molar solution of __________ is the best conductor of electricity.
sodium chloride
acetic acid
sulphuric acid
sucrose

⇒ The minimum temperature to which the water can be cooled in a cooling tower is the __________ temperature of air.
ambient
dry bulb
dew point
wet bulb

⇒ By X-ray diffraction, it is not possible to determine the
preferred orientation.
residual localised stresses.
particle size.
ordered arrangement of magnetic moments.

⇒ Presence of small quantity of sulphur in low carbon steel improves its
formability
machinability
weldability
hardenarality

⇒ Increase in the entropy of a system represents the
degradation of energy.
decrease in system pressure.
increase in the availability of energy.
increase in the temperature.

⇒ Coating of zinc over steel is known as
cladding
galvanising
anodising
passivation

⇒ Drossing is a __________ operation.
smelting
dressing
roasting
dressing

⇒ Which of the following is the largest quantum of pressure?
1 kg/cm²
1 bar
1 atmosphere
1 kilo Pascal

⇒ Brazing filler metal used for joining steel plates
melts below the melting points of base metals.
melts below 300°C.
is copper phosphorous alloy.
is copper.

⇒ Which one can be directly solidified from gaseous state wihtout entering into liquid state ?
Helium
Oxygen
Carbon dioxide
None of these

⇒ Creep consideration is the most important in case of the
blades of gas turbines.
steam engine flywheel.
cast iron pipes.
cycle chains.

⇒ Compression ratio of an I.C. engine is the ratio of the
clearance volume to the volume swept by piston per stroke.
volume of air in cylinder before compression to that after compression.
pressure after compression to that before compression.
none of these

⇒ The __________ of a double acting reciprocating pump as compared to the single acting pump will be almost double.
flow output
head developed
overall efficiency
weight

⇒ __________ cycle is the most efficient thermodynamic cycle.
Diesel
Otto
Rankine
Carnot

⇒ The ability of a substance to assume two or more crystalline structure is called
isomorphism
polymorphism
amorphism
isomerism

⇒ Out of the following, the most ductile material is
mild steel
copper
nickel
aluminium

⇒ Gratings is associated with the measurement of
linear displacement.
concavity/convexity.
surface texture.
flatness.

⇒ Potable water means the water used for
fire-fighting
cooling
drinking
evaporation to produce steam

⇒ Thermal diffusivity of a substance is proportional to (where, k = Thermal conductivity)
1/k
k
k²
1/k²

⇒ Which of the following is not a characteristic observed in material failure by fatigue fracture ?
Plastic deformation of material does not occur.
Initiation of crack from below the surface does not occur.
Initation of crack occurs on the surface of the machine part.
Presence of both rough & smooth zone with conchoidal markings in smooth zone of the surface.

⇒ Material of construction of surveying metallic tapes is __________ which has low coefficient of expansion & enough strength.
constantan
invar
pewter metal
monel metal

⇒ __________ number determines whether the fluid flow in an open channel is supercritical, critical or sub-critical.
Mach
Reynolds
Froude
Weber

⇒ Which of the following is a unit of time ?
Barn
Light year
Angstrom
none of these

⇒ The behaviour of a metal specimen, which when plastically strained in tension reduces its yield stress in compression and vice versa; is termed as the
work hardening.
Bauschinger effect.
creeping effect.
stress recovery effect.

⇒ At 100% relative humidity, the dew point temperature of moist air is
less than the wet bulb temperature.
more than the wet bulb temperature.
equal to the wet bulb temperature.
equal to the ambient temperature.

⇒ For grinding of softer materials, the grinding wheel should have __________ grain size.
finer
coarser
medium
any type of