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Chemical Engineering Basics

Chemical Engineering Basics
Nusselt number is related to the Reynolds number (Re) in turbulent & laminar flow respectively as

Re0.8, Re-0.5
Re0.8, Re0.5
Re0.5, Re0.8
Re-0.8, Re0.5

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Chemical Engineering Basics
The most important consideration, while designing the refrigeration system of an aircraft is that the refrigeration system

Is as light as possible
Employs minimum quantity of refrigerant
Consumer minimum horse power
Has very high C.O.P

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Chemical Engineering Basics
Which of the following metals is the most prone to work hardening?

Lead
Brass
Aluminium
Copper

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Chemical Engineering Basics
Transition from laminar flow to turbulent flow in fluid flow through a pipe does not depend upon the

Diameter of the pipe
Velocity of the fluid
Density of the fluid
Length of the pipe

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Chemical Engineering Basics
Air refrigeration cycle is used in the air crafts, because of

Its higher co-efficient of performance (COP)
Low temperature encountered at high altitude
Its low unit weight per ton of refrigeration
Its high heat transfer rate

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Chemical Engineering Basics
In age-hardenable alloys, maximum ductility is obtained

After optimum ageing
In as cast state
After overageing
Immediately after solution treatment and subsequent quenching

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