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Chemical Engineering Basics

Chemical Engineering Basics
In a casting, cold shut defect is caused by

Low pounhg temperature
Faulty gating system
Melt-mould reactions
Very low mould permeability

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Chemical Engineering Basics
Rankine cycle comprises of two isothermal and two __________ processes.

Isobaric
None of these
Isentropic
Polytropic

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Chemical Engineering Basics
Which of the following will resist maxi-mum shock & vibration without cracking?

Grey cast iron
Graphite
Malleable iron
White cast iron

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Chemical Engineering Basics
The wet bulb temperature is lower in dry air than in wet air at the same temperature. A dry bulb thermometer registers a higher temperature than a wet bulb thermometer except at __________ percent relative humidity.

50
None of these
100

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Chemical Engineering Basics
At the point of boundary layer separation in fluid flow, the

Shear stress is zero
Shear stress is maximum
Velocity gradient is flat
Density variation is maximum

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Chemical Engineering Basics
A highly elastic material is deformed least on loading and retains its original form on removal of the load. Which of the following is the most elastic material?

Glass
Brass
Steel
Rubber

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