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Process Equipment and Plant Design

In the case of a shell and tube heat exchanger, the logarithmic mean temperature difference ______________________?

Process Equipment and Plant Design /
In the case of a shell and tube heat exchanger, the logarithmic mean temperature difference ______________________?

A. Is always less than arithmetic average value
B. Is always more than arithmetic mean value and the geometric mean value
C. Is always less than arithmetic mean value, but more than geometric mean value
D. May be either more or less than geometric mean and arithmetic mean value depending upon
whether the flow of stream is co-current or counter-current

In the case of a shell and tube heat exchanger, the logarithmic mean temperature difference ______________________? Read More »

Process Equipment and Plant Design

A pipe is generally made of circular cross-section, because a circular cross-section has the____________________?

Process Equipment and Plant Design /
A pipe is generally made of circular cross-section, because a circular cross-section has the____________________?

A. Higher structural strength
B. Lowest surface area requirement for a given volume
C. Both A. & B.
D. None of these

A pipe is generally made of circular cross-section, because a circular cross-section has the____________________? Read More »

Process Equipment and Plant Design

For a given design of bubble cap, the number of bubble caps to be used per tray is set by the _________________?

Process Equipment and Plant Design /
For a given design of bubble cap, the number of bubble caps to be used per tray is set by the _________________?

A. Allowable gas velocity through the slots
B. Plate spacing
C. Diameter of the column
D. All A., B. and C.

For a given design of bubble cap, the number of bubble caps to be used per tray is set by the _________________? Read More »

Process Equipment and Plant Design

The practical representative values of HETP for a number of commercial operations lies within a range of ______________ metre?

Process Equipment and Plant Design /
The practical representative values of HETP for a number of commercial operations lies within a range of ______________ metre?

A. 0.1-0.2
B. 0.2-0.5
C. 0.4-0.9
D. 1.2-1.5

The practical representative values of HETP for a number of commercial operations lies within a range of ______________ metre? Read More »

Process Equipment and Plant Design

For a cylindrical internally pressurised vessel, which of the following closure types would withstand highest pressure, if each closure is of the same material and thickness ?

Process Equipment and Plant Design /
For a cylindrical internally pressurised vessel, which of the following closure types would withstand highest pressure, if each closure is of the same material and thickness ?

A. Hemispherical
B. Ellipsoidal (2 : 1)
C. Conical
D. Flat plate

For a cylindrical internally pressurised vessel, which of the following closure types would withstand highest pressure, if each closure is of the same material and thickness ? Read More »

Process Equipment and Plant Design

In a distillation column, minimum clearance to be maintained between the overflow weir and the last row of the bubble caps is ______________ cms?

Process Equipment and Plant Design /
In a distillation column, minimum clearance to be maintained between the overflow weir and the last row of the bubble caps is ______________ cms?

A. 2.5
B. 7.5
C. 15
D. 20

In a distillation column, minimum clearance to be maintained between the overflow weir and the last row of the bubble caps is ______________ cms? Read More »

Process Equipment and Plant Design

In condenser, the cooling water is passed in the tube side in a pass arrangement, because________________?

Process Equipment and Plant Design /
In condenser, the cooling water is passed in the tube side in a pass arrangement, because________________?

A. It reduces heat transfer area
B. More thinner tubes can be used
C. Pressure drop is reduced
D. It makes condenser compact

In condenser, the cooling water is passed in the tube side in a pass arrangement, because________________? Read More »

Process Equipment and Plant Design