The most common cause of acidity in water is_______________?
The most common cause of acidity in water is_______________?
A. carbon dioxide
B. oxygen
C. hydrogen
D. nitrogen
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Corrosion in concrete sewers is caused by______________?
Corrosion in concrete sewers is caused by______________?A. septic conditions
B. dissolved oxygen
C. chlorine
D. nitrogenCorrosion in boilers can be prevented by
Question: Corrosion in boilers can be prevented by
[A].deaeration of feed water. [B].
enhancing pH of feed water by adding alkali. [C].
feeding sodium sulphite or hydrazine phosphate to the boilers, which combines with oxygen and prevents corrosion. [D].
all (a), (b) and (c). Answer: Option D
Explanation:
No answer description available for this question.
The water carriage system of collection of waste product________________?
The water carriage system of collection of waste product________________?A. is cheaper in initial cost than dry conservancy system
B. requires treatment before disposal
C. creates hygenic problem
D. all of the aboveThe per capital consumption of a locality is affected by_________________?
The per capital consumption of a locality is affected by_________________?1) climatic conditions
2) quality of water
3) distribution pressure
The correct answer is?
A. only (1)
B. both (1) and (2)
C. both (1) and (3)
D. all (1), (2) and (3)The velocity of flow of water in a sedimentation tank is about__________________?
The velocity of flow of water in a sedimentation tank is about__________________?A. 5 to 10 cm/sec.
B. 15 to 30 cm/sec.
C. 15 to 30 cm/minute
D. 15 to 30 cm/hourMoist atmospheric air at high temperature (e.g., in summer) having high concentration of sulphur dioxide causes
Question: Moist atmospheric air at high temperature (e.g., in summer) having high concentration of sulphur dioxide causes
[A].fading of dyes on textiles. [B].
corrosion, tarnishing & soiling of metals. [C].
reduced strength of textiles. [D].
all (a), (b) and (c). Answer: Option D
Explanation:
No answer description available for this question.