March 2019 - Page 841 of 895 -

In a distillation column, the minimum residence time for liquid in the downspout is about ______________ seconds?

Process Equipment and Plant Design / admin

In a distillation column, the minimum residence time for liquid in the downspout is about ______________ seconds?

A. 1
B. 8
C. 80
D. 180

In a distillation column, the minimum residence time for liquid in the downspout is about ______________ seconds? Read More »

Process Equipment and Plant Design

A head comprises of straight flange section, corner torus, section and central dished section. Crown radius and knuckle radius in a head is related respectively to the__________________?

Process Equipment and Plant Design / admin

A head comprises of straight flange section, corner torus, section and central dished section. Crown radius and knuckle radius in a head is related respectively to the__________________?

A. Central dished section and corner torus section
B. Corner torus section and central dished section
C. Central dished section and straight flange section
D. Straight flange section and corner torus section

A head comprises of straight flange section, corner torus, section and central dished section. Crown radius and knuckle radius in a head is related respectively to the__________________? Read More »

Process Equipment and Plant Design

Generally, elliptical dished heads____________________?

Process Equipment and Plant Design / admin

Generally, elliptical dished heads____________________?

A. Are manufactured on 2:1 ratio of major to minor axis and is recommended to be used for
pressure vessels operating above a pressure of 1.5 MN/m2
B. Resist half the pressure rating compared to hemi spherical head provided on the cylindrical
shell of the same thickness and diameter
C. Are approximately as strong as seamless cylindrical shell having the corresponding I.D and
O.D
D. All A., B. and C.

Generally, elliptical dished heads____________________? Read More »

Process Equipment and Plant Design

For given number of passes, pitch & tube diameter, the maximum number of tubes that can be accommodated in a shell of tripled inside diameter will be ____________ times?

Process Equipment and Plant Design / admin

For given number of passes, pitch & tube diameter, the maximum number of tubes that can be accommodated in a shell of tripled inside diameter will be ____________ times?

A. About 9
B. Considerably more than 9
C. Considerably less than 9
D. About 3

For given number of passes, pitch & tube diameter, the maximum number of tubes that can be accommodated in a shell of tripled inside diameter will be ____________ times? Read More »

Process Equipment and Plant Design

Number of evaporators which can be used in service in a multiple effect evaporation system is limited by the__________________?

Process Equipment and Plant Design / admin

Number of evaporators which can be used in service in a multiple effect evaporation system is limited by the__________________?

A. Practical limit reached, due to low heat transfer rate because of inadequate temperature
difference
B. Economic limit reached, when the plant cost exceeds the saving of steam
C. Both A. & B.
D. Neither A. nor B.

Number of evaporators which can be used in service in a multiple effect evaporation system is limited by the__________________? Read More »

Process Equipment and Plant Design

A high vapour velocity is required for high plate efficiency in a sieve plate column. The satisfactory value of operating vapor velocity for design purpose in sieve plate column is about _______________ percent of the flooding velocity?

Process Equipment and Plant Design / admin

A high vapour velocity is required for high plate efficiency in a sieve plate column. The satisfactory value of operating vapor velocity for design purpose in sieve plate column is about _______________ percent of the flooding velocity?

A. 45
B. 60
C. 80
D. 95

Process Equipment and Plant Design