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Process Equipment and Plant Design

Process Equipment and Plant Design
Safety valves are provided in chemical equipments to guard against excessive

Pressure/pressure fluctuation
Temperature
Noise
Turbulence

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Process Equipment and Plant Design
Diameter of bubble caps used in high pressure columns is __________ as compared to that used in identical vacuum columns.

Same
More
Less
Either A or B; no generalisation can be made

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Process Equipment and Plant Design
Needle valves are generally not used for

Smaller sizes of pipe
Very large diameter pipes
Very accurate flow control
High pressure throttling service

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Process Equipment and Plant Design
Spherical shaped pressure vessel is considered to be the most ideal, because it can

Withstand higher pressure for a given metallic shell thickness
Be designed without wind load considerations
Be supported very easily
Be fabricated very easily

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

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

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Process Equipment and Plant Design
Diameter of rivet hole (d, mm) and the plate thickness (t, mm) are related by Unwin's formula as

D = 1.6 √t
D = 3√t
D = 1.5 t
D = 1.1 t

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