SURVEYING QUIZ

The non-clog pump which permits solid matter to pass out with the liquid sewage, is

None of these

Reciprocating pump

Pneumatic ejector

Centrifugal pump

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The coagulant which is generally not used for treating the sewage, is

Alum

Ferric sulphate

Ferric chloride

Chlorinated coppers

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The ratio of maximum sewage flow to average sewage flow for mains up to 1 m in diameter, is

4

3

1.5

2

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The sludge does not contain waste water from

Bath rooms

Wash basins

Toilets

Kitchen sinks

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The ratio of design discharge to the surface area of a sedimentation tank is called

Overflow rate

Overflow velocity

Surface loading

All of these

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For large sewers, maximum distance between manholes may be

300 m

50 m

200 m

100 m

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The effluent of a septic tank is

As good as that from a complete treatment

None of these

Foul and contains dissolved and suspended solids

Fit for discharge into any open drain

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In septic tanks, decomposition of organic bacteria, is done by

Anaerobic bacteria

None of these

Aerobic bacteria

Both types of bacterias

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The suitable cross-section of sewers to carry combined flow, is

Circular

Rectangular

Egg shaped

Horse shoe shaped

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Drop manholes are the manholes

Having drains at different levels

With depths more than 3.5 m

Without entry ladders

Without manhole covers

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