Chemical Engineering Basics

361. Increase in the entropy of a system represents the

1. Degradation of energy
2. Decrease in system pressure
3. Increase in the availability of energy
4. Increase in the temperature

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362. Increasing sulphur content in pig iron tends to make it

1. Soft
2. Hard
3. Tough
4. Ductile & malleable

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363. Increasing the carbon content of steel

1. Reduces the upper shelf energy
2. Increasing the ductility transition temperature
3. Decreases brittleness
4. Decreases hardness

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364. Induced draft fans provided in large thermal power plant boilers have __________ blades.

1. Forward curved
2. Backward curved
3. Double curved
4. Radial or straight

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365. Inertial forces are obtained, when the elastic forces are multiplied by __________ number.

1. Mach
2. Froude
3. Reynolds
4. Euler

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366. Insulation of liquid surface can be achieved by __________ on top of its surface.

1. Floating hollow polypropylene spheres
2. Spraying alumina powder
3. Putting cement
4. None of these

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367. Internal energy of a gas obeying Van-Der-Waals equation of state, [p + (a/v^>2)] (V - b) = RT, depends upon its

1. Pressure & temperature
2. Pressure & specific volume
3. Temperature & specific volume
4. Temperature only

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368. Iron content in Indian iron ore is about __________ percent.

1. 80-85
2. 60-65
3. 40-45
4. 20-25

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369. Isotropic materials have the same __________ in all directions.

1. Induced stresses
2. Density
3. Elastic properties
4. Thermal properties

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370. Joining of thin foils is preferred to be done by

1. Gamma rays
2. X-rays
3. Microwaves
4. Gas welding

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