PROCESS EQUIPMENT AND PLANT DESIGN QUIZ

To keep the power input constant for a stirred vessel operating under fully developed turbulent flow conditions (constant power number), if the impeller diameter is increased by 20%, the impeller speed should be decreased by a factor of

(1.2)3/2

(1.2)3/5

(1.2)5/3

(1.2)2/3

TRUE ANSWER : ?
YOUR ANSWER : ?

for couplings and unions would be

Negligible

200

350

60

TRUE ANSWER : ?
YOUR ANSWER : ?

Slope of countercurrent flow rotary drier is in the range of __________ meter/metre.

0 to 0.08

0 to 1.5

0 to 2.2

0 to 0.8

TRUE ANSWER : ?
YOUR ANSWER : ?

Which of the following is not a graphical method (but is an analytical method) for the calculation of theoretical number of stages in case of continuous binary distillation?

Ponchon-Savarit method

McCabe-Thiele's method

None of these

Sorel-Lewis method

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YOUR ANSWER : ?

Poisson's ratio of a material is the ratio of unit lateral strain to the unit axial elongation within its elastic limit. The value of Poisson's ratio for structural and pressure vessel steel may be taken as

0.3

0.01

0.95

0.75

TRUE ANSWER : ?
YOUR ANSWER : ?

In a distillation column, minimum clearance to be maintained betweeen the overflow weir and the last row of the bubble caps is __________ cms.

2.5

7.5

15

20

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YOUR ANSWER : ?

High pressure fluid in a shell and tube heat exchanger should preferably be routed through the

Shell side for smaller total pressure drop

Shell side for large overall heat transfer co-efficient

Tubes to avoid the expansion of high pressure shell construction

Shell side, if the flow is counter-current and tube side if the flow is co-current

TRUE ANSWER : ?
YOUR ANSWER : ?

__________ strain is measured using a 'strain rosetter'.

Volumetric

None of these

Linear

Shear

TRUE ANSWER : ?
YOUR ANSWER : ?

Welded joint efficiency in the design of chemical process equipment is taken as

0.85

0.95

0.75

0.55

TRUE ANSWER : ?
YOUR ANSWER : ?

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.)

L/Z.H.ρ

Z.H.ρ/L

H.ρ/L

Z.H/L.ρ

TRUE ANSWER : ?
YOUR ANSWER : ?