Top 350+ Solved Environmental Engineering MCQ Questions Answer
Q. What is a laser?
a. Electro-magnetic waves
b. Ultrasonic waves
c. Supersonic waves
d. Light amplification by stimulated emission of radiation
e. Green
Q. All of the following pollutants affect heart EXCEPT
a. Cadmium
b. Arsenic
c. Lead
d. Carbon monoxide
e. None of the above
Q. The permissible hardness of water for low pressure boiler is
a. 50 mg/litre
b. 150 mg/litre
c. 250 mg/litre
d. 350 kg/litre
e. 450 mg/litre
Q. Desalination is usually needed for
a. well water
b. rain water
c. sea water
d. river water
e. None of the above
Q. To keep the water safe against pathogenetic bacteria the residual chlorine should remain between
a. 0.05 to 0.2 ppm
b. 0.2 to 0.8 ppm
c. 1 ppm to 2 ppm
d. 6 ppm to 10 ppm
e. 10 ppm to 20 ppm
Q. Which of the following industry is least polluting?
a. Cement industry
b. Oil refinery
c. Thermal power plants
d. Electronic industry
e. Rolling mills
Q. Carbon monoxide poisoning may cause
a. headache
b. drowsiness
c. dizziness
d. Any of the above
e. None of the above
Q. When the trees are planted by road side, the average distance between two trees should be
a. 2 to 3 metres
b. 5 to 8 metres
c. 10 to 15 metres
d. 25 to 30 metres
e. None of the above
Q. Addition to alum increases
a. hardness of water
b. carbonates of water
c. sulphates in water
d. Acidity of water
e. None of the above
Q. If the pH of water is 7 it means the water is
a. acidic
b. alkaline
c. neutral
d. free from oxygen
e. None of the above
Q. The volume fraction of ozone in atmospheric air is nearly
a. 0.02 ppm
b. 0.2 ppm
c. 2 ppm
d. 20 ppm
e. None of the above
Q. Suspended liquid droplets generated by condensation from the gaseous to the liquid state or by breaking up a liquid into a dispersed state is known as
a. Dust
b. Fume
c. Mist
d. Vapours
e. None of the above
Q. The maximum acceptable noise level in offices is
a. 10 dB
b. 40 dB
c. 75 dB
d. 100 dB
e. None of the above
Q. Type of radiation expected from earbon 14 is
a. Alpha
b. Beta
c. Gamma
d. Alpha, Beta, Gamma
e. None of the above
Q. The pH value of sea water is usually
a. 1
b. Between 3 and 5
c. Between 5 and 7
d. Between 8 and 8.3
e. Between 13.7 and 14