Top 350+ Solved Environmental Engineering MCQ Questions Answer
Q. The presence of fluorides in drinking water helps in
a. Preventing decaying of teeth
b. Purification of water
c. Reduces fungi formation
d. Killing aerobic bacteria
e. Deodourisation of water
Q. The science of poisons - their effects, antidotes and detection, is known as
a. Toxicology
b. Poisonology
c. Minerology
d. Hermetilogy
e. Petrology
Q. Which thermometer is used to indicate the lowest temperature?
a. Liquid thermometer
b. Alcohol thermometer
c. Green
d. Resistance thermometer
e. Clinical thermometer
Q. For controlling the growth of algae, the chemical generally used is
a. Bleaching powder
b. Lime
c. Ozone
d. Copper sulphate
e. Alum
Q. The flouride content in the drinking water should not exceed
a. 200 mg/litre
b. 150 mg/litre
c. 100 mg/litre50 mg/litre
d. 1 mg/litre
e. 50 mg/litre
Q. The discharge of hydrocarbons from automobile exhaust is maximum when the vehicle is
a. Cruising at low speeds
b. Idling
c. Decelerating
d. Cruising at high speeds
e. Accelerating
Q. Lead poisoning occurs when the lead content in water is
a. 30 - 50 ppm
b. 300 - 500 ppm
c. 10 - 15 ppm
d. 3 - 5 ppm
e. 0.3 - 0.5 ppm
Q. Which of the following units measures the memory of the Computer?
a. Bits
b. None of these
c. Volts
d. Amperes
e. Ohms
Q. The atmosphere gets heated up mainly by
a. Radiation from the earth's surface
b. Radiogenic heat
c. Heat of the earth's interior
d. Direct sun-rays
e. None of these
Q. The ratio activity of water due to Strontium can be removed by
a. Phosphate coagulation
b. Lime
c. Lime - Soda solution
d. Alum coagulation
e. Aeration
Q. Which of the following plant is highly sensitive to mercury vapour?
a. Sarcococca
b. Sunflower
c. Ivy
d. Cherry
e. Aloc
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. Decelerating
e. Accelerating
Q. For removal of temporary hardness of water
a. Water is filtered
b. Chlorine is passed through water
c. Alum is added to water
d. Water is boiled
e. Lime is added to water
Q. The total count of bacteria in portable water should not exceed
a. 5000 per c.c.
b. 998 per c.c.
c. 1 mg/litre
d. 10,000 per c.c.
e. 10 per c.c.
Q. A blue smoke from a diesel engine indicates presence of
a. Unburnt carbon
b. Carbon monoxide
c. Unburnt oil
d. Nitrous oxide
e. Carbon dioxide