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Process Equipment and Plant Design

Process Equipment and Plant Design
The normal range of velocity of steam in pipes is __________ m/sec.

10-20
1-5
80-100
0.1-0.5

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Process Equipment and Plant Design
Normally, the ratio of the total riser area to the tower cross sectional area (for bubble cap towers of diameter more than 3 ft) is around

0.55-0.85
0.4-0.6
0.35-0.75
0.1-0.2

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Process Equipment and Plant Design
A/an __________ is used for changing the direction of a pipeline.

Flange
Elbow
Union
Disc compensator

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Process Equipment and Plant Design
A single pass air heater is connected to a two pass unit. For the air flow rate and other conditions remaining the same, the film heat transfer co-efficient for air will vary in the ratio of

20.2
None of these
20.8
2

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Process Equipment and Plant Design
Rotary driers are most economically designed for the number of heat transfer units (HTU) from

1.5 to 2.5
10 to 20
0.01 to 1
5 to 10

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Process Equipment and Plant Design
Back-trapping in a distillation column results due to

High gas velocity
Excessive liquid gradient over the tray
Low gas velocity
Low reflux ratio

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