500 Best Environmental Engineering- MCQ
Q133). The apparatus used for feeding chlorine into water is called
a).Chlorine tank
b).Aeration fountain
c).Chlorinator
d).None of these
Correct Answer:
Chlorinator
Explanation:
Q134). When the chlorine is added beyond the break point, the process of treating the water is known as
a).Plain chlorination
b).Post chlorination
c).De-chlorination
d).Super chlorination
Correct Answer:
Super chlorination
Explanation:
Q135). The process of removing excess chlorine from water is called
a).Plain chlorination
b).Post chlorination
c).De-chlorination
d).Super chlorination
Correct Answer:
De-chlorination
Explanation:
Q136). The process of de-chlorination is followed by
a).Plain chlorination
b).Post chlorination
c).Super chlorination
d).Double chlorination
Correct Answer:
Super chlorination
Explanation:
Q137). The amount of chlorine used for plain chlorination of water is about
a).0.2 ppm
b).0.3 ppm
c).0.4 ppm
d).0.5 ppm
Correct Answer:
0.5 ppm
Explanation:
Q138). The most commonly used chemical for dechlorination of water is
a).Sodium thiosulphate
b).Sodium sulphite
c).Potassium permanganate
d).All of these
Correct Answer:
All of these
Explanation:
Q139). In orthotolodine test, sage residual for drinking water is indicated by
a).Yellow colour
b).Green colour
c).Lemon yellow colour
d).None of these
Correct Answer:
Yellow colour
Explanation:
Q140). Bleaching powder is
a).Slaked lime
b).Chloride of lime
c).Hypo chloride of lime
d).Hypo chlorite of lime
Correct Answer:
Hypo chlorite of lime
Explanation: