Ozone and iodine
Chlorine or its compounds
Ultraviolet light for irradiation of water
All of the above
✅ The correct answer is option D.
Environmental Engineering MCQs
Enhance your preparation with our Environmental Engineering MCQs with answers and explanations. Our collection covers key topics such as water and wastewater treatment, air pollution control, solid waste management, environmental impact assessment, sustainability, and environmental regulations. These multiple-choice questions are ideal for students, competitive exam aspirants, and professionals preparing for NTS, PPSC, FPSC, CSS, PMS, PEC exams, university entry tests, and environmental engineering job assessments. Practice online to strengthen your concepts, improve problem-solving skills, and excel in exams with our updated Environmental Engineering MCQs.
62. Inhalation of silica dust causes a disease called
Bronchitis
Silicosis
Pneumoconiosis
None of these
✅ The correct answer is option B.
63. Removal of __________ is accomplished by aeration of water.
Dissolved gases
Suspended solids
Dissolved solids
None of these
✅ The correct answer is option A.
64. The lowest layer of atmosphere is known as the
Stratosphere
Troposphere
Ionosphere
None of these
✅ The correct answer is option B.
65. Carbon monoxide is a pollutant, which causes
Respiratory disease (e.g. asthma)
Asphyxiation (suffocation) leading to death
Retardation in crop growth
Damage to building materials like marble
✅ The correct answer is option B.
66. Lung cancer & DNA breakage are the major ill effects of excessive ozone exposure to human beings. Ozone layer depletion in the atmosphere is mainly caused by the presence of
CO₂
SO₂
Hydrocarbons
CFC (chloro fluoro carbon)
✅ The correct answer is option D.
67. Ozone is
A primary pollutant
A secondary pollutant
Impervious to ultra-violet rays
Both B & C
✅ The correct answer is option D.
68. Corrosion in boilers can be prevented by
Deaeration of feed water
Enhancing pH of feed water by adding alkali
Feeding sodium sulphite or hydrazine phosphate to the boilers, which combines with oxygen and prevents corrosion
All of the above
✅ The correct answer is option D.
69. A ‘body’ which allows the short wavelength incoming solar radiation to enter in, but does not allow long wave length outgoing infra red radiation to escape out is called the
Global warming
Green house
Atmospheric effect
Ionosphere
✅ The correct answer is option B.
70. The principal gas evolved from sludge digestion tank is
CO
CO₂
CH₄
N₂
✅ The correct answer is option C.