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Process Equipment and Plant Design

Process Equipment and Plant Design
To avoid the tearing off the plate of an edge, the margin (i.e., the minimum distance from the centre of the rivet hole to the nearest edge of the plate) should be equal to

1.5 d
0.5 d
2.5 d
D

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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.

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

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Process Equipment and Plant Design
The minimum plate spacing in most of the pertroleum refinery distillation columns (of dia > 3 ft) is normally __________ inches.

6
18
34
12

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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
0.35-0.75
0.4-0.6
0.1-0.2

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

Saddle
Socket
Nipple
Ferrule

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Process Equipment and Plant Design
for couplings and unions would be

350
200
Negligible
60

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