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Chemical Engineering Basics

Chemical Engineering Basics
There are one octahedral void and __________ tetrahedral void in the closest packing of atoms.

Three
One
Two
None of these

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Chemical Engineering Basics
The most commonly used combustion system manufactured in India for the thermal power plant boilers is the __________ combustion system.

Circulating fluidised bed
Pulverised fuel
Fluidised bed
Travelling grate stoker firing

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Chemical Engineering Basics
The most detrimental impurity in high pressure boiler feed water is

Turbidity
Silica
Suspended salt
Dissolved salt

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Chemical Engineering Basics
The heat treatment to which the steel wire containing > 0.25% carbon is subjected to is

Full annealing
None of these
Patenting
Bright annealing

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Chemical Engineering Basics
__________ is the process used for setting up compressive stresses in the surface of a metal to improve its fatigue strength.

Spinning
Shot peening
Lancing
Slugging

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Chemical Engineering Basics
Hollow shafts can be made as strong as solid shafts by making the twisting moments of both the shafts same. Shafts made by __________ have residual stresses.

Forging
Cold rolling
Hot rolling
Casting

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