Top 350+ Solved Environmental Engineering MCQ Questions Answer
Q. The atmosphere gets heated up mainly by
a. Direct sun-rays
b. Radiation from the earth's surface
c. Heat of the earth's interior
d. Radiogenic heat
e. None of these
Q. The ratio activity of water due to Strontium can be removed by
a. Aeration
b. Alum coagulation
c. Phosphate coagulation
d. Lime
e. Lime - Soda solution
Q. Aeration of water is done for all of the following purposes EXCEPT for
a. removal of bad tastes
b. removal of carbon dioxide
c. increasing the quantity of oxygen in water
d. removal of temporary hardness
e. None of the above
Q. Which of the following plant is highly sensitive to mercury vapour?
a. Sunflower
b. Ivy
c. Aloc
d. Cherry
e. Sarcococca
Q. The emission of carbon monoxide in automobile exhaust will be low when the vehicle is
a. Idling
b. Cruising at low speed
c. Cruising at high speed
d. Accelerating
e. Decelerating
Q. For removal of temporary hardness of water
a. Water is filtered
b. Water is boiled
c. Alum is added to water
d. Lime is added to water
e. Chlorine is passed through water
Q. The total count of bacteria in portable water should not exceed
a. 10,000 per c.c.
b. 5000 per c.c.
c. 998 per
d. 10 per c.c.
e. 1 mg/litre
Q. The rate at which atoms of radioactive sources disintegrate is measured in terms of
a. Cuire
b. Atomic number
c. Wavelength
d. Frequency
e. None of the above
Q. BF3 counter can detect which of the following radiations?
a. Alpha particles
b. Neutrons
c. X-rays
d. Beta rays
e. None of the above
Q. For minimal eye irritation, pH value of swimming pool water should be in the range
a. 6.2 to 6.8
b. 6.5 to 7.0
c. 7.0 to 7.2
d. 7.5 to 7.6
e. None of the above
Q. Car speed of a lift is usually
a. 0.1 to 0.3 m/s
b. 0.5 to 1 m/s
c. 2 to 5 m/s
d. 7 to 10 m/s
e. None of the above
Q. A blue smoke from a diesel engine indicates presence of
a. Nitrous oxide
b. Carbon dioxide
c. Carbon monoxide
d. Unburnt oil
e. Unburnt carbon
Q. Which of the following is not a constituent of coal?
a. Hydrogen
b. Nitrogen
c. Inorganic matter
d. Manganese
e. None of the above
Q. For portable water the permissible pH value is
a. 1 - 4.5
b. 4.5 - 7
c. 7 - 8.5
d. 9 -- 11
e. 11 -- 14
Q. The percentage of krypton in atmospheric air is around
a. 0.01 ppm
b. 0.1 ppm
c. 1 ppm
d. 10 ppm
e. None of the above