Chemical Engineering MCQs

Page No. 70

Presence of ____________ in water stream are deleterious to aquatic life?


a Soluble and toxic organics

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bSuspended solids

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cHeavy metals and cyanides

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dAll A., B. & C.

✓


View Answer All A., B. & C.

Tolerable limit of nitrogen oxides in air is _____________ ppm?


a 0.1

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b 1

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c5

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d25

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View Answer 5

BOD of raw municipal sewage may be in the range of about _____________ mg/litre?


a1-2

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b5-10

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c150-300

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d2000-3000

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View Answer 150-300

Iron & manganese present in the polluted water is removed by __________________?


aSimple filtration

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bOxidation followed by settling & filtration

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cChemical coagulation

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dChlorination only

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TLV of aldrin in public water supply system is about ____________ μg/litre?


a0.5

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b 17

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c357

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d1097

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View Answer 17

Aerobic biological oxidation ponds used for the purification of polluted water__________________?


aDestroys/removes pathogen from the sewage

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b. Is not very effective for non-biodegradable substances (e.g. ABS) containing effluents

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cDestroys/removes pathogen much more effectively if the sewage is chlorinated

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dAll A., B. & C.

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View Answer All A., B. & C.

Presence of excess fluorine in water causes__________________?


aDental cavity

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b Tooth decay

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cFluorosis

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dRespiratory disease

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View Answer Fluorosis

The shape of T-S diagram for Carnot Cycle is a__________________?


aRectangle

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bRhombus

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cTrapezoid

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dCircle

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View Answer Rectangle

Trouton’s ratio of ______________ liquids is calculated using Kistyakowsky equation?


aPolar

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bNon-polar

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cBoth A. & B

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dNeither A. nor B

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View Answer Non-polar

One mole of nitrogen at 8 bar and 600 K is contained in a piston-cylinder arrangement. It is brought to 1 bar isothermally against a resisting pressure of 1 bar. The work done (in Joules) by the gas is_________________?


a30554

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b10373

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c4988.4

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d4364.9

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View Answer 10373

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