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Process Equipment and Plant Design

Process Equipment and Plant Design
Maximum size of the raschig rings used in a packed tower is about __________ of the coloumn diameter.

1/50th
1/10th
1/20th
1/30th

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Process Equipment and Plant Design
The wall thickness of thin cylindrical shell with hemispherical ends is __________ that of the spherical ends.

Less than
More than
Equal to
Either B or C; depends on maximum permissible internal pressure

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Process Equipment and Plant Design
Safety valves are provided in chemical equipments to guard against excessive

Pressure/pressure fluctuation
Noise
Temperature
Turbulence

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Process Equipment and Plant Design
With increase in the reflux ratio for a fixed production from a continuous binary distillation column, the __________ decreases.

Running cost of cooling water for condenser
Vapour & liquid load both
Running cost of steam for reboiler
Fixed charges initially

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Process Equipment and Plant Design
For identical operating conditions, the pressure drop over __________ tray is the highest out of the following.

Bubble cap
Valve
Counterflow
Sieve

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Process Equipment and Plant Design
In a heat exchanger, shell side fluid velocity can be changed by changing the tube

Pitch
Layout
Neither A nor B
Both A & B

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