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Chemical Engineering Basics

Chemical Engineering Basics
Carbon is present in the form of __________ in grey cast iron.

Nodular aggregates of graphite
Cementite
Flakes
Spheroids

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Chemical Engineering Basics
Boiler draught of 10 mm water column is equivalent to

1 kgf/m²
10 kgf/mm²
10 kgf/m²
1 kgf/mm²

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Chemical Engineering Basics
In radiative heat transfer, a grey surface is the one, which has

Emissivity independent of wavelength
Zero reflectivity
Equal brightness in all directions
Grey appearance to the eye

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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?

Steel
Rubber
Glass
Brass

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Chemical Engineering Basics
Shaft/rotor speed is most accurately measured by a

Frequency counter
Tachometer
Strobometer
Speedometer

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Chemical Engineering Basics
Which of the following welding processes employs the highest welding temperature ?

Gas welding
Resistance welding
Arc welding
Thermit welding

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