(Last Updated On: July 28, 2022)
This is the Multiple Choice Questions Part 3 of the Series in Environmental Engineering (Environmental Science) as one of the General Engineering and Applied Sciences (GEAS) topic. In Preparation for the ECE Board Exam make sure to expose yourself and familiarize in each and every questions compiled here taken from various sources including past Board Questions in General Engineering and Applied Sciences (GEAS) field.
Continue Practice Exam Test Questions Part 3 of the Series
⇐ MCQ in Environmental Engineering Part 2 | Engineering Board Exam
Choose the letter of the best answer in each questions.
101. All of the following give Beta and Gamma radiations EXCEPT
A. Iridium 192
B. Iodine 131
C. Cobalt 60
D. Polonium 210
E. None of the above
Answer: Option D
Solution:
102. Which of the following is pesticide?
A. Endrin
B. Aldrin
C. Toxaphene
D. DDT
E. All of the above
Answer: Option E
Solution:
103. DDT is
A. An inorganic compound
B. A compound of phosphorus
C. A chlorinated hydrocarbon
D. A naturally occurring chemical
E. None of the above
Answer: Option C
Solution:
104. Term REM is used for
A. solar radiation
B. flame photography
C. radiation exposure
D. none of the above
E. None of the above
Answer: Option C
Solution:
105. While comparing tungsten filament lamps with fluorescent tubes, all of the following are the advantages in favor of tungsten filament lamp EXCEPT
A. Longer life
B. Low cost
C. More brightness
D. Simple installation
E. None of the above
Answer: Option A
Solution:
106. Odours are generally expressed in terms of
A. Hardness number
B. Gravity number
C. Index number
D. Threshold number
E. None of the above
Answer: Option D
Solution:
107. Disinfection of water is done by
A. Filtration
B. Alum
C. Ozone
D. Heating and cooling
E. Passing chlorine
Answer: Option E
Solution:
108. Which of the following is/are renewable sources of energy?
A. Fall or flow of water
B. Sun
C. Wood
D. All of the above
E. Green
Answer: Option D
Solution:
109. The maximum concentration of lead in drinking water should not exceed.
A. 0.0005 mg/liter
B. 0.005 mg/liter
C. 0.05 mg/liter
D. 0.5 mg/liter
E. 5 mg/liter
Answer: Option C
Solution:
110. Ash content of a diesel fuel should not exceed
A. 10%
B. 1%
C. 0.50%
D. 0.01%
E. None of the above
Answer: Option C
Solution:
111. In power plant an electrostatic precipitator is installed between
A. Forced draft fan and furnace
B. Furnace and chimney
C. Primary air and secondary air
D. Induced draft fan and forced draft fan
E. Air preheater and water treatment plant
Answer: Option B
Solution:
112. Which emission has generally least proportion from a diesel engine as compared to a petrol engine?
A. Oxides of nitrogen
B. Hydrocarbons
C. Carbon monoxide
D. All of the above
E. None of the above
Answer: Option A
Solution:
113. Which of the following turbidimeter gives direct readings in ppm
A. Jackson turbidimeter
B. Hellige turbidimeter
C. Baylis turbidimeter
D. All of the above
E. None of the above
Answer: Option A
Solution:
114. Which of the following gas can be analyzed by chemiluminescence?
A. Ozone
B. Carbon dioxide
C. Nitrogen
D. All of the above
E. None of the above
Answer: Option A
Solution:
115. Permissible noise level in small conference room is
A. 10 to 15 dB
B. 15 to 25 dB
C. 35 to 40 dB
D. 55 to 60 dB
E. None of the above
Answer: Option C
Solution:
116. The aeration of water is done for the removal of
A. Colour
B. Turbidity
C. Bacteria
D. Odour
E. Hardness
Answer: Option D
Solution:
117. The method used for the removal of fine suspended particle is
A. Filtration
B. Agitation
C. Flotation
D. Aeration
E. Screening
Answer: Option A
Solution:
118. Which organisms cause infectious diseases?
A. Viruses
B. Worms
C. Protozoa
D. Fungi
E. All of the above
Answer: Option E
Solution:
119. Alum increases
A. Hardness of water
B. Carbonates of water
C. Sulphates in water
D. Acidity of water
E. None of the above
Answer: Option D
Solution:
120. Which of the following industry will usually have the highest consumption of water for processing?
A. Foundry
B. Steel plant
C. Automobile industry
D. Paper mill
E. Aluminium industry
Answer: Option D
Solution:
121. Electrodialysis is the process of removal of
A. soluble gases in water
B. dissolved solids in water
C. suspended solids in water
D. none of the above
E. None of the above
Answer: Option B
Solution:
122. The presence of fluorides in drinking water helps in
A. Purification of water
B. Preventing decaying of teeth
C. Deodorization of water
D. Reduces fungi formation
E. Killing aerobic bacteria
Answer: Option B
Solution:
123. Which radio nuclide has the least half-life period?
A. Carbon 14
B. Iodine 131
C. Radium
D. Hydrogen 3
E. None of the above
Answer: Option B
Solution:
124. Identify the incorrect statement if any
A. If the pH value of water is 14 the water has maximum alkalinity
B. pH value of 6 represents acidic water
C. Water having pH value 4 will be more acidic than water having pH value of 6
D. Maximum acidity of water is indicated by pH value of zero
E. None of the above
Answer: Option D
Solution:
125. The science of poisons – their effects, antidotes and detection, is known as
A. Toxicology
B. Minerology
C. Petrology
D. Poisonology
E. Hermetilogy
Answer: Option A
Solution:
126. Which of the following can have octane rating of more than 100?
A. Gobar gas
B. Methyl alcohol
C. Benzol
D. Ethyl alcohol
E. None of the above
Answer: Option C
Solution:
127. Which thermometer is used to indicate the lowest temperature?
A. Clinical thermometer
B. Alcohol thermometer
C. Resistance thermometer
D. Liquid thermometer
E. Green
Answer: Option B
Solution:
128. In the jet propulsion, efficiency of the propulsions depends upon
A. The speed of the vehicle
B. Height at which the vehicle is travelling
C. Density of the medium in which the vehicle is travelling
D. All of the above
E. Green
Answer: Option C
Solution:
129. The speed of sound in air is
A. 144 m/s
B. 344 m/s
C. 1344 m/s
D. 3344 m/s
E. None of the above
Answer: Option B
Solution:
130. Which of the following shading device will transmit least leat inside a room?
A. Plain glass sheet 3 mm thick
B. Plain glass sheet with wire mesh outside
C. Plain glass sheet with Venetion blind inside
D. Plain glass with curtain inside
E. None of the above
Answer: Option D
Solution:
131. All of the following pollutants are produced as a result of decaying organic matter EXCEPT
A. Ammonia
B. Sulphur dioxide
C. Methane
D. Hydrogen sulfide
E. None of the above
Answer: Option B
Solution:
132. Half-life period for carbon 14 is nearly
A. 1.2 days
B. 5.73 days
C. 5.73 years
D. 5730 days
E. None of the above
Answer: Option D
Solution:
133. The unit parts per million is identical to
A. Grains per galleon
B. Pounds per cubic foot
C. Milligrams per kg
D. Tonnes per acre foot
E. None of the above
Answer: Option C
Solution:
134. Which fuel will have least air consumption per kg of fuel during consumption?
A. Gasoline
B. Benzol
C. Spirit
D. Lubricating oil
E. None of the above
Answer: Option C
Solution:
135. The desirable temperature inside an air-conditioned auditorium is
A. 0°C
B. 5°C
C. 10°C
D. 20°C
E. None of the above
Answer: Option D
Solution:
136. One kg of octane is burnt by four alternative processes given below. In which case the work available will be maximum
A. When burnt in an open pan in atmosphere
B. When burnt in an internal combustion engine
C. When burnt in a fuel cell
D. When burnt in a reversible process
E. None of the above
Answer: Option D
Solution:
137. Which of the following is a cold cathode lamp?
A. Sodium vapour lamp
B. High pressure mercury vapour lamp
C. Low pressure mercury vapour lamp
D. Neon lamp
E. None of the above
Answer: Option D
Solution:
138. Corrosive action of water could be due to its
A. alkalinity
B. hardness
C. dissolved oxygen
D. Any of the above
E. None of the above
Answer: Option D
Solution:
139. The antidote for the poisonous effects due to mercury, is
A. Vitamin K
B. BAL
C. Thiosulphate
D. Altropine
E. Any of the above
Answer: Option B
Solution:
140. The speed of sound through human body is around
A. 344 m/s
B. 688 m/s
C. 1560 m/s
D. 3120 m/s
E. None of the above
Answer: Option C
Solution:
141. A fuel of octane rating 85 matches the antiknock qualities of a mixture consisting of
A. 85% petrol + 15% diesel
B. 15% petrol + 85% diesel
C. 85% benzene + 15% methyl chloride
D. 85% octane + 15% heptane
E. None of the above
Answer: Option D
Solution:
142. For controlling the growth of algae, the chemical generally used is
A. Alum
B. Lime
C. Bleaching powder
D. Copper sulphate
E. Ozone
Answer: Option D
Solution:
143. Out of the following metals the least permissible percentage in drinking water is
A. Chromium
B. Copper
C. Zinc
D. Lead
E. None of the above
Answer: Option A
Solution:
144. The first aid for a victim of electric shock is
A. bandage
B. sprinkling of water on the face
C. glass of milk and cold water
D. artificial respiration
E. None of the above
Answer: Option D
Solution:
145. Prechlorination
A. Improves coagulation
B. Reduces odours
C. Reduces organisms
D. All of the above
E. None of the above
Answer: Option E
Solution:
146. Which of the following engines uses two fuels simultaneously?
A. Multifuel engine
B. Wankel engines
C. Free piston gas generator
D. Dual fuel engines
E. None of the above
Answer: Option D
Solution:
147. On board ships, the source of drinking water may be
A. Rainwater
B. Sea water
C. Desalted Sea water
D. Pumped deep sea water
E. Any of the above
Answer: Option C
Solution:
148. Which pollutants result from automobile exhaust?
A. Carbon monoxide
B. Nitrous oxide
C. Hydrocarbons
D. Sulphur dioxide
E. All of the above
Answer: Option E
Solution:
149. The fluoride content in the drinking water should not exceed
A. 200 mg/liter
B. 150 mg/liter
C. 100 mg/litre50 mg/liter
D. 50 mg/liter
E. 1 mg/liter
Answer: Option E
Solution:
150. How many kg of air will contain one kg of oxygen?
A. 1 kg
B. 4.35 kg
C. 8.70 kg
D. 12.5 kg
E. None of the above
Answer: Option B
Solution:
Complete List of MCQs in General Engineering and Applied Science per topic
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