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Process Equipment and Plant Design

Process Equipment and Plant Design
Normally, the length to diameter ratio of rotary dryers varies form 4 to 10 and for its economic operation, the number of transfer units (NTU) for such dryers varies from

7.5-10.0
1.5-2.5
44119
3.5-5.5

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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

D
1.5 d
0.5 d
2.5 d

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Process Equipment and Plant Design
__________ dished head is the strongest of all.

Hemispherical
Elliptical
Torispherical
None of these

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Process Equipment and Plant Design
Which of the following lengths of heat exchanger tubes are normally not used in practice?

2.5 metres
0.5 metre
6 metres
10 metres

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Process Equipment and Plant Design
Lug support is meant for supporting __________ vessels.

Large horizontal cylindrical
Tall but empty
Thick walled tall
Small

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Process Equipment and Plant Design
The maximum liquid gradient over a tray must not exceed

0.5" -1.25"
2"-3.5"
5"
Half the tray spacing

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