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Process Equipment and Plant Design

Process Equipment and Plant Design
In case of a shell and tube heat exchanger, the effect of L/D on inside film heat transfer co-efficient (hi) vanishes after a Reynold number of

5000
10000
1000
3000

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Process Equipment and Plant Design
The absorption factor is defined as (where, S₁ = slope of the equilibrium curve, S₂ = slope of the operating line)

S₁/S₂
S₁.S₂
1/S₁.S₂
S₂/S₁

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Process Equipment and Plant Design
In common bubble cap distillation column design practice, riser area is approximately equal to (where, Aa = Annular passage area, and Sa = Slot area)

Aa = 1.5 Sa
Sa = 1.5 Aa
Aa = Sa
1.2 Aa = 1.2 Sa

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Process Equipment and Plant Design
Fouling factor must be included in the calculation of over all design heat transfer coefficient, when the liquid

Is highly viscous
Containing suspended solids flows at low velocity
Is of high specific gravity
Containing suspended solids flows at high velocity

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Process Equipment and Plant Design
The design stress, which is more than the damaging stress, is the least unit stress that will render a member unfit for service before the end of its normal life. The design stress factor or factor of safety indicates the margin between design stress and the __________ stress.

None of these
Working
Allowable
Damaging

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Process Equipment and Plant Design
Lap joints are preferred for plates having thickness __________ mm.

43961
> 5
< 12.5
> 3

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