In a grit chamber of a sewage treatment plant,

If the flame of a miner's safety lamp in the upper layers of the sewer forms an explosive, the sewer certainly contains

Pick up the incorrect size of stone ware sewers

The sewage treatment in septic tanks is due to

Which of the following pumps in used to pump sewage solids with liquid sewage without clogging the pump is

In a grit chamber of a sewage treatment plant,

For detecting the nitrates in sewage, the colour may be developed by adding

The normal values of over flow rates for sedimentation tanks using coagulent, ranges between

The spacing of man holes along a straight portion of a sewer ism, the diameter of the sewer may be

The Brake Horse power of the motor (efficiency 60%) required for a pump of capacity 0.cumec for a total lift ofm, is

Pick up the correct statement from the following :

If the flame of a miner's safety lamp in a manhole extinguishes within 5 minutes, the sewer certainly contains

Pick up the correct statement from the following :

The ratio of maximum sewage flow to average sewage flow for trunk mains having diameters more than 1.m, is

The flow velocity in detritus tanks is

R.M.O. expenses include

The rate of accumulation of sludge per person per year, is

The grit and silt of the grit chambers, may not be used for

The most efficient cross section of sewers in a separate sewerage system is

The following is the physical characteristic of sewage

For drainage pipes in buildings the test applied before putting them to use, is

The disintegrating pump in which solid matter is broken up before passing out, is

In a sludge tank, the gas mainly produced, is

The formula which accepts the value of rugosity coefficient n = 0.to be used in Manning's formula, is given by

If asolution of sewage sample is incubated for 5 days at 20°C and the dissolved oxygen depletion was found to be 8 mg/l. The BOD of the sewage is

The formula which accepts the value of rugosity coefficient n = 0.to be used in Manning's formula, is given by

The following is the physical characteristic of sewage

For laying a sewer line in a trench of 2 m width, an offset line is marked on the ground parallel to the given centre line at a distance of

For large sewers, maximum distance between manholes may be

The maximum spacing of manholes specified by Indian standard in sewers upto 0.3 m diameter is

The first stage of neutral process of sludge digestion, is

The design period in years for pumping plants, is

Lead acetate test in sewer manhole is done to test the presence of

The Chezy's constant C in the formula V = C rs depends upon

Dried sewage after treatment is used as

Afive day B.O.D. at 15°C of the sewage of a town iskg/day. If the 5 day B.O.D. per head at 15°C for standard sewage is 0.1 kg/day, the population equivalent is

The use of coarse screens for the disposal of sewage, may be dispensed with by

The density of population overhectares is 250/hectare. If water supply demand per day islitres and sewage discharge isof water supply, the sewage flow in sewers of separate system, is

To prevent settling down of sewage both at the bottom and on the sides of a large sewer, self-cleaning velocity recommended for Indian conditions, is

Pick up the correct statement from the following :

Pick up the correct statement from the following :

If the over land flow from the critical point to the drain is 8 km and the difference in level is 12.4 m, the inlet time is

The sewage is pumped up

The asbestos cement pipes are generally laid

In sewers the gas generally found, is

Flocculated particles do not change their

Dilution method of disposing off sewage, is not preferred to

In olden days the type of section adopted in trunk and out fall sewers was

For the survival of fish in a river stream, the minimum dissolved oxygen is prescribed

An inverted siphon is designed generally for