A Best Way To Crack Gorenment Job Exams

Civil Engineering Objective Questions { Hydrology }

281. Pick up the correct statement from the following :
A. Lime may be used to soften the hard water
B. Excessive use of lime may kill the bacterias
C. Excessive lime when added to water, raises its pH value
D. All the above.
Discuss in Forum

282.  Pick up the incorrect statement from the following :
A. Water disinfected with ozone is free from any odour
B. Ozone removes bacterias as well as colour and odour
C. ozonised water becomes tasteless
D. None of these.
Discuss in Forum

283.  Disappearance of pink colour of water of a well due of KIIVIn04 indicates that water contains
A. acidity
B. alkalinity
C. turbidity
D. organic matter
Discuss in Forum

284. The pH value of water is kept slightly less than 7 so that hydrochloride ions may combine with ammonia ions to form
A. Mono-chloramine (NHC1)
B. Di-chloramine (NH2C1)
C. Nitrogen trichloramine (NC13)
D. All the above.
Discuss in Forum

285. The gaseous form of chlorine gets converted into liquid fbrm when subjected to a pressure of
A. 5 kg/cm2
B. 6 kg/cm2
C. 7 kg/cm2
D. 8 kg/cm2
Discuss in Forum

286.  The chlorine supply cylinders are generally kept at 38?C to 4000 to prevent
A. conversion into crystals
B. it from burning
C. it from explosion
D. none of these.
Discuss in Forum

287.  The duration of contact of chlorine with water before it is served to the first consumer, should be at least
A. 10 to 15 minutes
B. 15 to 20 minutes
C. 20 to 30 minutes
D. 30 to 40 minutes
Discuss in Forum

Page 41 of 53

« 39 40  41  4243 »