Process Equipment and Plant Design
An underdesigned steam trap will

Destroy itself of acceleration wear due to rapid recycling
Waste steam
Back up condensate and cause water hammer in steam line
None of these

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Process Equipment and Plant Design
In case of design of a shell and tube heat exchanger,

Minimum tube sheet thickness (in which tubes are fixed) is equal to the O.D. of the tube upto 15 mm tube diameter; and for > 15 mm tube diameter, tube sheet thickness is smaller than tube diameter
O.D. of the tube is 6 to 40 mm while the tube lengths used are 0.5, 2.5, 3.0, 4.0, 5.0, 6 metres
All of these
Minimum cleaning lane of 6.5 mm is provided, when tubes are on a square pitch

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Process Equipment and Plant Design
Pick out the wrong statement about the design of seive plate column and the bubble cap column.

Weir height in case of a bubble cap plate ranges from 50 to 150 mm and is higher than the seive plate
The downcomer design and the residence time in the downcomer is almost same for seive plate and bubble cap columns
Weir length for a bubble cap plate is the same as that for the seive plate
Weir height for a bubble cap plate column is the same as that for a seive plate column

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Process Equipment and Plant Design
A forced circulation long tube vertical evaporator as compared to the natural circulation evaporator

Employs a centrifugal pump placed between external downtake from vapor drum and inlet to tube bundle
Is economical in operation
Employs high velocity, high heat transfer rate and less heating surface requirement
Both B & C

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