Related Questions

Kelly and Chris packed several boxes with books. If Chris packed 60 percent of the total number of boxes, what was the ratio of the number of boxes Kelly packed to the number of boxes Chris packed?
A 1 to 6
B 1 to 4
C 2 to 5
D 2 to 3
A first order reaction is to be treated in a series of two mixed reactors. The total volume of the two reactors is minimum, when the reactors are
A Equal in size
B Of different sizes
C Of such size that the ratio of their volumes is
D None of these
For high conversion in a highly exothermic solid catalysed reaction, use a __________ bed reactor.
A Fixed
B Fluidised bed reactor followed by a fixed
C Fixed bed reactor followed by a fluidised
D Fluidised
Pressure drop in a fluidised bed reactor is __________ that in a similar packed bed reactor.
A Less than
B More than
C Same as
D None of these
For liquid flow through a packed bed, the superficial velocity as compared to average velocity through the channel in the bed is
A More
B Less
C Equal
D Independent of porosity
When an exothermic reversible reaction is conducted adiabatically, the rate of reaction
A Continuously increases
B Continuously decreases
C Passes through a maximum
D Passes through a minimum
A circular flower bed has diameter 4m. The flower bed is increased so that the diameter is now 12m. How many times larger is the new flower bed?
A 9
B 3
C 32
D 8
In case of absorption with exothermic reaction, for fluids having
A Pr = Sc; percentage change in heat and mass transfer flux will be the same for a given change in the degree of turbulence
B Pr = Sc = 1; total mass, momentum and thermal diffusivity will be the same
C Both A & B
D Pr = Sc ; there won
Pick out the exothermic reaction out of the following:
A C + H2O = CO + H2
B CaC2 + H2O = Ca(OH)2 + C2H2
C MgCO3 = MgO + CO2
D All of the above
A machine part is packed in a box of size 5cm x 4cm x 2cm. The number of parts that can be packed in a carton of size 25cm x 16cm x 8cm is-
A 60
B 80
C 40
D 160

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