Related Questions

If h₁ = inner film co-efficient and /h₂ = outer film co-efficient, then the overall heat transfer co-efficient is
A Always less than h₁
B Always between h₁ and h₂
C Always higher than h₂
D Dependent on metal resistance
B is thrice as efficient as A and C is 0.75 times as efficient as A. What is the ratio of number of days taken by A, B and C when they work individually?
A 4:1:3
B 3:1:4
C 2:3:1
D 5:1:2
Fill in the blank : Cars and people don't easily share space, so Gruen strove to get people quickly parked and out of their cars, to ----the space from cars and get people about their business in a tranquil, protective and interesting setting.
A gerontocracy
B warrant
C disencumber
D nadir
In case of a ternery system involving two liquid components and a solute, the ratio of the concentration of the solute in the two phases at equilibrium is called the distribution co-efficient. The distribution co-efficient depends upon the
A Solute concentration
B Temperature
C Both A & B
D Neither A nor B
Free energy, fugacity and activity co-efficient are all affected by change in the temperature. The fugacity co-efficient of a gas at constant pressure ____with the increase of reduced temperature.
A Decreases
B Increases
C Remains constant
D Decreases logarithmically
For turbulent flow in a tube, the heat transfer co-efficient is obtained from the Dittus-Boelter correlation. If the tube diameter is halved and the flow rate is doubled, then the heat transfer co-efficient will change by a factor of
A 1
B 1.74
C 6.1
D 37
Reactors designed for propulsion applications are designed for
A Natural uranium
B Enriched uranium
C Pure uranium
D Any type of uranium
The film co-efficient is decreased due to the presence of non-condensing gases in the vapors. The film co-efficient of superheated vapor as compared to that of saturated vapor is
A More
B Less
C Some
D Either more or less ; depends on the nature of vapor
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
Which of the following consists of one or more filaments of glass fiber wrapped in protective layers that carries data by pulse light ?
A Twisted pair
B Coaxial cable
C Optical fiber
D satellite

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