Which of the following is not a source of waste water?
(a) Sewers
(b) Homes
(c) Industries
(d) Hospitals
In a filtration plant water is filtered using layers of
(a) sand and clay.
(b) clay and fine gravel.
(c) sand and fine gravel.
(d) sand, fine gravel and medium gravel.
Which of the following is a part of inorganic impurities of the
sewage?
(a) Pesticides
(b) Urea
(c) Phosphates
(d) Vegetable waste
The system of a network of pipes used for taking away
wastewater from homes or public buildings to the treatment
plant is known as
(a) sewers.
(b) sewerage.
(c) transport system.
(d) treatment plant.
Pick from the following one chemical used to disinfect water.
(a) Chlorine
(b) Washing soda
(c) Silica
(d) Coal
Water polluted by various human activities causes a number
of water borne diseases. Which of the following is not a water
borne disease?
(a) Cholera
(b) Typhoid
(c) Asthma
(d) Dysentry
Open drain system is a breeding place for which of the
following.
(a) Flies
(b) Mosquitoes
(c) Organisms which cause diseases
(d) All of these
Which of the following is/are products of wastewater
treatment?
(a) Biogas
(b) Sludge
(c) Both biogas and sludge
(d) Aerator
Sewage is mainly a
(a) liquid waste.
(b) solid waste.
(c) gaseous waste.
(d) mixture of solid and gas.
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