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Chemical Engineering Basics

Chemical Engineering Basics
1% concentration of water vapor in air is equivalent to __________ ppm (parts per million).

1000
10
100
10000

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Chemical Engineering Basics
Milligram of KOH required to saponify 1 gm of oil is called its __________ number.

Acid
Saponification
Emulsion
Precipitation

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Chemical Engineering Basics
Out of the following, which will fracture most readity, when hit with a hard hammer ?

Brass
Cast iron
German silver
Bronze

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Chemical Engineering Basics
While the oxy-acetylene flame produces a temperature of 3200°C, the temperature produced by oxy-hydrogen flame is about __________ °C.

1800
2400
3000
2000

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Chemical Engineering Basics
The best criterion for analysing an economic investment is the

Future value method
Rate of return criterion
Present value method
Salvage value

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Chemical Engineering Basics
Function of feed check valve in a boiler is to

Check the water level in the boiler drum
Facilitate circulation of high pressure feed water
Regulate the water flow to boiler
Prevent the back flow of water

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