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Process Equipment and Plant Design

Process Equipment and Plant Design
Bubble cap diameter used for the distillation column having diameter ranging from 1.5 to 4.5 metres is about __________ mm.

50
100
150
10

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Process Equipment and Plant Design
Tube wall thickness depends on the cor-rosiveness of the fluids and their operating pressure & temperature and is specified by Birmingham wire gauge (B.W.G)-a number which varies from 8 to 18 with the numbers 14 and 16 being more commonly used. Outside diameter of tubes varies from about 15 to 50 mm; however a tube of less than __________ mm outside diameter is generally not recommended for fouling fluids.

19
28
38
16

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Process Equipment and Plant Design
Removable connection of tubes to tube sheet is called

Saddle
Nipple
Socket
Ferrule

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Process Equipment and Plant Design
An increase in the liquid resistance to interphase mass transfer and a resultant reduction in plate efficiency is caused by

Decrease in gas solubility for absorbers
All of these
An increase in liquid viscosity
An increase in relatived volatility for rectification columns

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Process Equipment and Plant Design
Speed of industrial paddle agitator ranges from __________ rpm.

20 to 100
500 to 750
1 to 5
1000 to 2000

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Process Equipment and Plant Design
In the design of a paddle agitator, the ratio (paddle dia/tank dia) is normally taken as

0.25
0.1
0.5
0.8

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