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
The use of space time is preferred over the mean residence time in the design of a/an
A Batch reactor
B Ideal tubular-flow reactor
C Slurry reactor
D CSTR
Space time equals the mean residence time
A When the density of the reaction mixture is constant
B For large diameter tubular reactor
C For narrow diameter tubular reactor
D For CSTR
When the density of the reaction mixture is constant in a chemical reaction, the ratio of the mean residence time to space time is
A > 1
B 1
C 0
In 2007, the arithmetic mean of the annual incomes of Rahim and Karim was Taka 3800 . The arithmetic mean of the annual incomes of Karim and Ripon was Ripon and Rahim was TaKa5800. What is the arithmetic mean of the incomes of the three ?
A 3200
B 1200
C 2400
D 4800
The mean of the 5 smallest numbers from a group is 15 while the mean of all the 13 members of the group taken together is 17. What is the mean of the 8 largest numbers?
A 18.50
B 17.75
C 18.75
D 18.25
For the same residence time, which one will give the maximum conversion?
A Single stirred tank (v = 5 litres)
B Two stirred tank (each of 2.5 litres) in series
C Stirred tank followed by tubular flow reactor (each of 2.5 litres)
D Single tubular flow reactor (v = 5 litres)
For a packed bed reactor; the presence of a long tail in the residence time distribution curve is an indication of
A Ideal plug flow
B Bypass
C Dead zone
D Chanelling
The residence time distribution of an ideal CSTR is
A 1/τ exp (-t/τ)
B Τ exp (-t/τ)
C Exp(-t/τ)
D 1/τ (-t/τ)
In the downcomer of a distillation column, the minimum recommended residence time is about __________ seconds.
A 2.5
B 5
C 12.5
D 17.5

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