Pressure drop due to pipe fittings can be estimated by the equation, ΔP/p = 4f.Le/D.V2/2gc, where, Le = equivalent length of straight pipeline which will incur the same frictional loss as the fitting and D = diameter of the fitting. The value of Le/D (dimensionless) for 45° elbow and 180° close return bends would be respectively around

Process Equipment and Plant Design
Pressure drop due to pipe fittings can be estimated by the equation, ΔP/p = 4f.Le/D.V2/2gc, where, Le = equivalent length of straight pipeline which will incur the same frictional loss as the fitting and D = diameter of the fitting. The value of Le/D (dimensionless) for 45° elbow and 180° close return bends would be respectively around

45 and 75

5 and 10

300 and 500

180 and 300

45 and 75

5 and 10

300 and 500

180 and 300

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Process Equipment and Plant Design
At the following point for a given packing and set of fluids, the pressure drop per metre of packed height, with variation in fluid rates and operating pressure

Decreases

Remains same

May increase or decrease depending upon the solubility of the gas in the liquid

Increases

Decreases

Remains same

May increase or decrease depending upon the solubility of the gas in the liquid

Increases

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Process Equipment and Plant Design
The thermal stress in a metallic bar does not depend upon the

Cross-sectional area

Both A & B

Neither A nor B

Changes in temperature

Cross-sectional area

Both A & B

Neither A nor B

Changes in temperature

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Process Equipment and Plant Design
The units of Young's modulus of elasticity and __________ are the same.

Strain

None of these

Modular ratio

Stress

Strain

None of these

Modular ratio

Stress

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Process Equipment and Plant Design
Bubble cap tray is the most commonly used tray in large distillation column, because

It eliminates the foaming and entrain-ment tendency during operation

None of these

Of its flexibility and nearly constant efficiency under varying conditions of operation

It incurs less pressure drop as compared to any other try designed for the same duty

It eliminates the foaming and entrain-ment tendency during operation

None of these

Of its flexibility and nearly constant efficiency under varying conditions of operation

It incurs less pressure drop as compared to any other try designed for the same duty

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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

95

45

80

60

95

45

80

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Process Equipment and Plant Design

Process Equipment and Plant Design At the following point for a given packing and set of fluids, the pressure drop per metre of packed height, with variation in fluid rates and operating pressure

Process Equipment and Plant Design The thermal stress in a metallic bar does not depend upon the

Process Equipment and Plant Design The units of Young's modulus of elasticity and __________ are the same.

Process Equipment and Plant Design Bubble cap tray is the most commonly used tray in large distillation column, because

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.

Process Equipment and Plant Design
At the following point for a given packing and set of fluids, the pressure drop per metre of packed height, with variation in fluid rates and operating pressure

Process Equipment and Plant Design
The thermal stress in a metallic bar does not depend upon the

Process Equipment and Plant Design
The units of Young's modulus of elasticity and __________ are the same.

Process Equipment and Plant Design
Bubble cap tray is the most commonly used tray in large distillation column, because

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.