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Process Equipment and Plant Design

Process Equipment and Plant Design
Low pressure steam (with saturation temperature between 105 to 120°C) is usually used in the vacuum evaporators, which normally employ a vacuum of about __________ mm Hg (referred to a 760 mm mercury barometer).

650
250
750
450

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Process Equipment and Plant Design
__________ tower is the most suitable gas-liquid contacting device involving highly corrosive fluids.

Bubble cap plate
Sieve plate
None of these
Packed

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Process Equipment and Plant Design
Thin spherical shells subjected to internal pressure, develop __________ stresses.

Radial
Neither A nor B
Both A & B
Circumferential

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Process Equipment and Plant Design
For storing hazardous chemicals in large storage tanks, the minimum safe distance between the two tanks should range between __________ times the tank diameter.

2.5 to 3.5
4 to 5
6 to 8
1 to 1.5

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Process Equipment and Plant Design
Diameter of bubble caps used in high pressure columns is __________ as compared to that used in identical vacuum columns.

More
Either A or B; no generalisation can be made
Less
Same

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Process Equipment and Plant Design
For laminar flow (NRe < 2100) in steel pipe, the optimum inside pipe diameter is given by

Di, opt = 7.6 Q0.36 . ρ0.9
Di, opt = 3 Q0.36 ρ0.18
Di, opt = 3 Q0.36 . ρ1.86 μ0.08
Di, opt = 3.9 Q0.45 . ρ0.23

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