Chemical Engineering - Process Equipment and Plant Design

1. 

Needle valves are generally not used for

A. very large diameter pipes.
B. high pressure throttling service.
C. very accurate flow control.
D. smaller sizes of pipe.

Answer: Option A

Explanation:

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2. 

Height equivalent to a theoretical plate (HETP) is the height of packing that will give the same separation as one theoretical plate in gas-liquid mass transfer operations like distillation, absorption/stripping and humidification/dehumidification. HETP which is experimentally determined, depends upon the

A. flow rates of each fluid.
B. type and size of packing.
C. concentration of each fluid.
D. all a, b & c.

Answer: Option D

Explanation:

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3. 

Pick out the wrong statement.

A. Safety valves are provided in heat exchangers for removal of non-conden-sables.
B. Liquid metals and dowtherm are used for very high temperature heating.
C. In a shell and tube heat exchanger, high pressure fluid is generally routed through the tube.
D. A loop seal or U-seal is provided in a vertical condenser sub-cooler to prevent quick draining of the condensate.

Answer: Option A

Explanation:

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4. 

With increase in gas flow rate to fabric surface area ratio (Nm3/hr/m2 fabric surface area), the size & the cost of a bag filter

A. increases
B. decreases
C. remain unaffected
D. none of these

Answer: Option B

Explanation:

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5. 

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.

Answer: Option A

Explanation:

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