Chemical Engineering MCQs

Page No. 70

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


a Soluble and toxic organics


bSuspended solids


cHeavy metals and cyanides


dAll A., B. & C.


View Answer All A., B. & C.

Tolerable limit of nitrogen oxides in air is _____________ ppm?


a 0.1


b 1


c5


d25


View Answer 5

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


a1-2


b5-10


c150-300


d2000-3000


View Answer 150-300

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


aSimple filtration


bOxidation followed by settling & filtration


cChemical coagulation


dChlorination only



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


a0.5


b 17


c357


d1097


View Answer 17

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


aDestroys/removes pathogen from the sewage


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


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


dAll A., B. & C.


View Answer All A., B. & C.

Presence of excess fluorine in water causes__________________?


aDental cavity


b Tooth decay


cFluorosis


dRespiratory disease


View Answer Fluorosis

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


aRectangle


bRhombus


cTrapezoid


dCircle


View Answer Rectangle

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


aPolar


bNon-polar


cBoth A. & B


dNeither A. nor B


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


b10373


c4988.4


d4364.9


View Answer 10373

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