Related Questions

Read the following passage carefully and then choose the right word to complete the sentence that follows. Rockets are very expensive as it can be used only once. Appled scientists have therefore develped a reusable space craft called a space shuttle which takes off like a rocket; however, does no get destroyed as it returns to earth. It can also be used to lunch satellired into space, retrieve them from space if any repairing os required and allow around 8 scientists to crryout experiments in space. The space shuttle does not get.
A flattened
B enlarged
C ruined
D developed
For a mixed flow reactor operating at steady state, the rate of reaction is given by
A $$\frac{{{{\text{F}}_{{{\text{A}}_{\text{0}}}}}}}{{\text{V}}} - \frac{{{\text{d}}{{\text{C}}_{\text{A}}}}}{{{\text{dt}}}}$$
B $$\frac{{{{\text{F}}_{{{\text{A}}_{\text{0}}}}}}}{{\text{V}}} + \frac{{{\text{d}}{{\text{C}}_{\text{A}}}}}{{{\text{dt}}}}$$
C $$\frac{{{{\text{F}}_{{{\text{A}}_{\text{0}}}}}}}{{\text{V}}} \cdot {{\text{X}}_{\text{A}}}$$
D $$ - \frac{{{\text{d}}{{\text{C}}_{\text{A}}}}}{{{\text{dt}}}}$$
In an ideal mixed reactor (at steady state), the
A Space time is equivalent to holding time for constant density systems
B Composition throughout the reactor remains same
C Exit stream has the same composition as the fluid within the reactor
D All of the above
In case of a __________ reactor, the composition in the reactor and at the exit of the reactor is the same.
A Semi-batch
B Tubular
C Batch
D Back-mix
The size of plug flow reactor (PFR) for all positive reaction orders and for any given duty, is __________ that of mixed reactor.
A Greater than
B Equal to
C Smaller than
D Unpredictable from the data
With increase in the order of reaction (for all positive reaction orders), the ratio of the volume of mixed reactor to the volume of plug flow reactor (for identical feed composition, flow rate and conversion)
A Increases
B Decreases
C Remains same
D Increases linearly
The ratio of volumes of the mixed reactor to the plug flow reactor (for identical feed composition, flow rate, conversion, and for all positive reaction orders) is always
A 1
B >1
C Equal to the order of reaction
a chemial is mixed 30 ml mixed , 10 ml is acid , how much ml of acid must be mixed such that a 50/50 mixure of water and acid is attend if no additional water is added
A 20
B 10
C 40
D 30
If the thermal conductivity of a wall material is independent of temperature, the steady state temperature distribution in the very large thin plane wall having steady, uniform surface tempeature follows __________ law.
A Parabolic
B Hyperbolic
C Linear
D Logarithmic
If the thermal conductivity of a wall material is independent of temperature, the steady state temperature distribution in the very large thin plane wall having steady, uniform surface temperature follows __________ law.
A Hyperbolic
B Parabolic
C Linear
D Logarithmic

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