500 Best Environmental Engineering- MCQ
Q41). The presence of bacteria in water causes
a).Hardness
b).Alkalinity
c).Diseases
d).Bad taste
Correct Answer:
Diseases
Explanation:
Q42). Colloidal impurities if associated with organic matter having bacterias becomes the chief source of
a).Hardness
b).Epidemic
c).Alkalinity
d).Bad taste
Correct Answer:
Epidemic
Explanation:
Q43). The presence of calcium and magnesium chloride in water causes
a).Softening
b).Bad taste
c).Hardness
d).Turbidity
Correct Answer:
Hardness
Explanation:
Q44). The Finely divided Dispersion of solid particles which are not visible to the naked eye and cannot be removed by ordinary filters are known as
a).Suspended impurities
b).Dissolved impurities
c).Colloidal impurities
d).None of these
Correct Answer:
Colloidal impurities
Explanation:
Q45). The turbidity in water is caused due to
a).Silt
b).Clay
c).Finely divided organic matter
d).All of these
Correct Answer:
All of these
Explanation:
Q46). Suspended impurities include
a).Algae
b).Protozoa
c).Fungi
d).All of these
Correct Answer:
All of these
Explanation:
Q47). The presence of sodium chloride in water
a).Causes bad taste
b).Softens the water
c).Increases hardness of water
d).Stops epidemic
Correct Answer:
Softens the water
Explanation:
Q48). The presence of sodium carbonate in water
a).Causes bad taste
b).Softens the water
c).Increases hardness of water
d).Stops epidemic
Correct Answer:
Softens the water
Explanation: