A Best Way To Crack Gorenment Job Exams

Civil Engineering Objective Questions { Hydrology }



295.  By adding 1 ml of orthotolidine solution to 100 ml chlorinated water taken after contact period, the residual chlorine makes the colour of solution
A. yellowish
B. greenish
C. bluish
D. reddish
Discuss in Forum

296.  Hardness of water can be removed by boiling if it is due to
A. calcium bicarbonates
B. calcium sulphates
C. calcium chloride
D. calcium nitrates.
Discuss in Forum

297.  One degree of hardness of water means a content of salts of
A. 10.25 mg/litre
B. 12.25 mg/litre
C. 14.25 mg/litre
D. 16.25 mg/litre.
Discuss in Forum

298.  The maximum permissible hardness for public supplies is
A. 95 mg/litre
B. 105 mg/litre
C. 115 mg/litre
D. 125 mg/litre
Discuss in Forum

299.  Permanent hardness of water can be removed by
A. adding alum
B. adding lime
C. adding chlorine
D. zeolite process.
Discuss in Forum

300. Dissolved carbon dioxide, can be removed from the supply main by
A. sedimentation
B. aeration
C. chlorination
D. coagulation
Discuss in Forum

301.  To control the growth of algae in reservoirs, the compound which is used, is
A. bleaching powder
B. copper sulphate
C. lime solution
D. alum solution
Discuss in Forum

Page 43 of 53

« 41 42  43  4445 »