chemical engineering chemical environmental engineering chemical engineering MCQs – Page 6

Practise multiple-choice questions from chemical engineering chemical environmental engineering chemical engineering for competitive examinations and subject revision. Review each marked answer and report any item that may be outdated or unclear.

chemical engineering chemical environmental engineering chemical engineering Mcqs
101. Carbonaceous particles having size less than 1 ?m are called___________________?
comments icon0

A. Grit

B. Aggregates

C. Smoke

D. s
102. Biological oxidation ponds remove organic matters present in the polluted water by _______________?
comments icon0

A. Using the activities of bacteria and other micro organisms

B. Aerobic oxidation

C. Both A. & B.

D. Neither A. nor B.

103. Persons working in cement plants and limestone quarries are more prone to disease like__________________?
comments icon0

A. Cancer

B. Asthma

C. Fluorosis (bone disease)

D. Silicosis
104. Which of the following is the common pollutant emitted from metallurgical smelters, thermal power plant and cement plants ?
comments icon0

A. F

B. NOx

C. SO2

D. Hg

105. A considerable part of the harmful ultraviolet radiation of the sum does not reach the earth surface, because of the fact that, there is a layer of _____________ high above earths atmosphere, which absorbs it?
comments icon0
A. Ozone

B. Hydrogen

C. None of these

D. Carbon dioxide

106. High noise level in a chemical plant can be controlled by the_________________?
comments icon0
A. All A., B. & C.

B. Path control of noise

C. Suppression of noise at the source itself

D. Protection of operating personnel

107. Deaeration of high pressure boiler feed water is done to reduce ___________________?
comments icon0

A. Foaming from boilers

B. Its dissolved oxygen content

C. Caustic embrittlement

D. Its silica content

108. Inorganic impurities causing water pollution is ____________________?
comments icon0

A. Protein

B. Carbohydrates

C. Fats

D. Salts of metals
109. COD of raw municipal sewage may be in the range of about _____________ mg/litre?
comments icon0

A. 10-May

B. 2-Jan

C. 90-120

D. 1500-2500

110. The resistance of water to the passage of light through it is a measure of the___________________?
comments icon0

A. Dissolved gases

B. Color

C. Hardness

D. Turbidity
111. Maximum permissible limit of mercury in human blood is ______________ micrograms/100 c.c?
comments icon0

A. 1

B. 82

C. 19

D. 7
112. Which of the following is a manmade source of air pollution ?
comments icon0

A. Forest fire

B. Bacterial action in soil and swamp areas

C. Automobile exhaust

D. All A., B. and C.

113. The progressive warming up of the earths surface is mainly due to the___________________?
comments icon0

A. Automobile exhaust

B. Blanketing effect of CO2 in the atmosphere

C. Thickening of ozone layer

D. De-forestation

114. Oceans act as sinks for atmospheric gases including carbon dioxide whose concentration in the atmosphere is increased by the_______________?
comments icon0

A. Forestation

B. Vegetation

C. Rain

D. Green house effect
115. Higher concentration of CO2 in atmosphere_____________________?
comments icon0
A. All A., B. and C.

B. Prevents solar heat being radiated out completely, resulting in heat trap i.e., global warming

C. Allows visible solar radiation (ultraviolet) of short wave-length to pass through

D. Reflects and absorbs the longer wavelength (infra-red) radiations

116. Smoke is produced due to__________________?
comments icon0

A. Poor quality of fuel and improper mixing of fuel & combustion air

B. Insufficient supply of combustion air and insufficient time for combustion

C. All A., B. and C.

D. Poor design & overloading of furnace

117. Which of the following pollutants is absent in the emissions from a fertiliser plant ?
comments icon0

A. NO2

B. CO

C. SO2 & SO3

D. NH3

118. Ozone is__________________?
comments icon0

A. A primary pollutant

B. A secondary pollutant

C. Impervious to ultra-violet rays

D. Both B. and C.
119. Shouting by a man at his full voice corresponds to a voice level of about _____________ decibels?
comments icon0

A. 25

B. 80

C. 50

D. 120

120. Inhalation of lead compounds present in automobile exhaust (using leaded petrol) causes__________________?
comments icon0
A. All A., B. & C.

B. Nervous system disorder

C. Blood poisoning

D. Anaemia