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Chemical Engineering Basics

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

Arc welding
Thermit welding
Resistance welding
Gas welding

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Chemical Engineering Basics
__________ is the most important element, which controls the physical properties of steel.

Manganese
Carbon
Vanadium
Silicon

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Chemical Engineering Basics
Grain hardness is measured by the __________ hardness testing method.

Shore sceleroscope
Knoop
Vicker's
Rockwell F

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Chemical Engineering Basics
A psychrometer does not measure the __________ temperature of moist air.

None of these
Dry bulb
Wet bulb
Dew point

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Chemical Engineering Basics
For the same heat input & compression ratio, efficiency of Otto cycle is higher than that of diesel cycle, because in Otto cycle.

Expansion & compression are isentropic
Heat rejection is lower
Maximum temperature is higher
Combustion is at constant volume

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Chemical Engineering Basics
The phenomenon of strain-ageing is generally experienced with

Cast iron
Low carbon steel
High carbon steel
High manganese steel

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