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Chemical Engineering Basics

Chemical Engineering Basics
Limestone addition in the blast furnace is done to flux __________ present in the raw materials.

SiO₂
MnO₂
P
Al2O₃

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Chemical Engineering Basics
Measurement of the area of the indented surface is not involved in the __________ hardhes testing method.

Knoop
Rockwell
Vicker's
Brinell

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Chemical Engineering Basics
Eutectoid reaction for iron-carbon system occurs at a temperature of __________ °C.

959
597
1493
1147

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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.

None of these
100
50

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Chemical Engineering Basics
For a thermodynamic system undergoing a process, which of the following pairs best expresses the relationship similar to that expressed by the pressure volume plot ?

Temperature - entropy
Enthalpy-pressure
Temperature - pressure
Enthalpy - entropy

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Chemical Engineering Basics
A controller action in which there is a con-tinous relation between the values of controlled variable and the rate of change of conrolled output signal is called the __________ action.

Derivative
None of these
Proportional
Integral

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