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Process Equipment and Plant Design

Process Equipment and Plant Design
Pressure differential maintained across a continuous rotary vacuum filter is in the range of __________ mm Hg column.

50 to 100
600 to 700
100 to 150
250 to 500

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Process Equipment and Plant Design
The average velocity in the tubes of a 1-4 heat exchanger is __________ times that in 1-1 heat exchanger having the same size & number of tubes and operated at same liquid flow rate.

43832
2
43834
4

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Process Equipment and Plant Design
In a rotary drier, the average retention time of solid is(where Z = length of the drier, metres ρ = apparent solid density, kg/m³ L = flow rate of dry solids, kg/see. m² drier cross-section H = hold up of solid.)

Z.H.ρ/L
Z.H/L.ρ
L/Z.H.ρ
H.ρ/L

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Process Equipment and Plant Design
If a single tube pass heat exchanger is converted to two passes; for the same flow rate, the pressure drop per unit length in tube side will __________ times.

None of these
Increase by 1.8
Increase by 21.6
Decrease by 22

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Process Equipment and Plant Design
A high vapour velocity is required for high plate efficiency in a seive plate coloumn. The satisfactory value of operating vapor velocity for design purpose in seive plate column is about __________ percent of the flooding velocity.

60
80
95
45

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Process Equipment and Plant Design
Elastic failure of a material occurs, when the tensile stress equals yield strength, yield point or the elastic limit. Also, the elastic failure occurs according to maximum strain theory, when the maximum tensile strain equals (where, σ = yield strength and E = modulus of elasticity)

E
Σ/E
E/σ
Σ

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