MCQOPTIONS
Bookmark
Saved Bookmarks
→
Mass Transfer
→
Flash Vaporization Line
→
Convection is faster than conduction?..
1.
Convection is faster than conduction?
A.
True
B.
False
Answer» B. False
Show Answer
Discussion
No Comment Found
Post Comment
Related MCQs
Heat transfer takes place as per ______________
Which is the fastest mode of transfer of heat?
Convection is faster than conduction?
A stream of air at 100 kPa pressure and 300 K is flowing on the top surface of a thin flat sheet of solid naphthalene of length 0.2 m with a velocity of 20 m/sec. The other data are:Mass diffusivity of naphthalene vapor in air = 6 * 10 –6 m2/secKinematic viscosity of air = 1.5 * 10 –5 m2.scConcentration of naphthalene at the air-solid naphthalene interface = 1 * 10 – 5 kmol/m3Calculate the overage mass transfer coefficient over the flat plate.Note: For heat transfer over a flat plate, convective heat transfer coefficient for laminar flow can be calculated by the equation.Nu = 0.664 ReL1/2 Pr1/3you may use analogy between mass and heat transfer.
In a wetted-wall tower, an air-H2S mixture is flowing by a film of water which is flowing as a thin film down a vertical plate. The H2S is being absorbed from the air to the water at a total pressure of 1.50 atm abs and 30oC. The value of kc of 9.567×10-4 m/s has been predicted for the gas-phase mass-transfer coefficient. At a given point the mole fraction of H2S in the liquid at the liquid-gas interface is 2.0×10-5 and pA of H2S in the gas is 0.05 atm. The Henry’s law equilibrium relation is pA(atm) = 609xA (mole fraction in liquid). Calculate the rate of absorption of H2S.
Convection does not occur in _______________
Which number forms the connecting link between the temperature and concentration profiles?
Which number forms the connecting link between the velocity and concentration profiles?
WHICH_NUMBER_FORMS_THE_CONNECTING_LINK_BETWEEN_THE_TEMPERATURE_AND_CONCENTRATION_PROFILES??$
WHICH_NUMBER_FORMS_THE_CONNECTING_LINK_BETWEEN_THE_VELOCITY_AND_CONCENTRATION_PROFILES??$
Reply to Comment
×
Name
*
Email
*
Comment
*
Submit Reply