Chemical Engineering MCQs

Page No. 803

Use of economiser in a boiler plant reduces the fuel consumption for steam generation by about _______________ percent ?


a1

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b10

✓


c30

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d50

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View Answer 10

Work done by a/an _________________ process is determined by ∫p. dv ?


aAdiabatic

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bQuasi-static

✓


cIsothermal

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dIsentropic

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View Answer Quasi-static

In troposphere (the weather domain), the temperature ‘t’ at height ‘h’ above the sea level in metres is given by (where, temperature at sea level is 15°C and t is in °C.) ?


at = 15 – 0.0065 h

✓


bt = 15 + 0.0065 h

✖


ct = 0.0035 h – 15

✖


dt = 15 – 0.0035 h

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View Answer t = 15 – 0.0065 h

Induced draft fans provided in large thermal power plant boilers have __________________ blades?


aForward curved

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bBackward curved

✓


cDouble curved

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dRadial or straight

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View Answer Backward curved

Which of the following gives the correct sequence of flow of the flue gases through the above mentioned boiler accessories ?


aA, C, B, D

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bD, B, C, A

✓


cD, C, B, A

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dD, A, B, C

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View Answer D, B, C, A

Wood is a/an ______________ material ?


aAmorphous

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bCellular

✓


cHomogeneous

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dGranular

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View Answer Cellular

In condensers used in thermal power plants, steam is normally used in shell side and cooling water on the tube side, because of the reason that ?


aCompared to the mass flow rate of cooling water, the rate of condensation of steam is invariably smaller

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bMaintaining vacuum on tube side is more difficult than that on the shell side

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cWater velocity can be increased conveniently to increase the overall heat transfer co-efficient

✓


dCondenser can act as a storage unit for condensed steam

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Steel balls are manufactured by_____________________?


aSintering

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bCasting

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cCold heading

✓


dSpinning

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View Answer Cold heading

____________________ are normally subjected to sub-zero treatment?


aHighly stressed parts

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bGauges or precision parts

✓


cCold rolled sheets

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dNon machinable materials

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Auto collimator is used to check____________________?


aFlatness

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bAngle

✓


cRotor balancing

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dRoughness

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View Answer Angle

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