WorksheetsAVCN CTN UNIT 1-2
Total questions: 42
Worksheet time: 21mins
What is sanitary engineering concerned with?
A. disposing of excess water and waste materials by means of sewer systems.
B. providing clean, safe water supply systems for town, cities, and rural areas.
C. using several techniques for purification
D. A and B are correct.
What are the techniques for water purification?
filtration, aeration and chlorination
filtration, aeration and sedimentation
aeration, sedimentation and chlorination
filtration, chlorination and biological means
Which method is used to kill bacteria?
sedimentation
filtration
aeration
chlorination
What does recycling mean?
allowing wastes to become solid or semi-solid
using the waste material again
removing gases with an unpleasant odor or taste
using some kinds of bacteria to kill other kinds
What can the waste from the treatment plant be used for?
A. energy and steam
B. fertilizer
C. fuel
D. B and C are correct.
Which technique is water passed through a filter that consists of a bed of sand or gravel?
sedimentation
aeration
filtration
chlorination
What is the technique of chlorination?
involving treatment with chemicals, usually chlorine, to kill harmful bacteria
burning their waste products to provide steam for generating electricity
using some kinds of bacteria to kill other kinds
shotting into the air, where sunlight and oxygen help to kill bacteria
What can waste products be used in the treatment plant?
they can be compacted to serve as fuel
they can be processed for reuse
they can be burnt to provide steam for generating electricity
they can be used as fertilizer and fuel
Environmental engineering is concerned with providing running water supply systems for urban and ___________.
suburbs
towns
cities
rural areas
Modern ___________systems use several techniques for purification.
water work
water treatment
water
water supply
In ___________, sprays of water are shot into the air in the sun.
chlorination
aeration process
sedimentation
biological method
A filter consists of a bed of sand or gravel which ___________ a proportion of solid.
consist of
pollutes
removes
contains
Chlorination is a method involving treatment with ___________.
chemicals
bacteria
air and sunlight
recycling
___________is one of methods to dispose of liquid and solid waste.
Sedimentation
Recycling
Aeration process
Chlorination
Using some kinds of ___________ to kill other kinds is known as biological method.
energy
air and sunlight
bacteria
chemicals
Recycling is one of modern methods to dispose of trash and ___________.
impurities
dirt
domestic waste
waste water
___________means using the waste materials again.
Sedimentation
Recycling
Chlorination
Biological method
In some treatment plants, the waste can be used as ___________ and fuel.
oil
fertilizer
energy
goods
People burn the waste products to provide steam for generating ___________.
energy
water power
heat
electricity
In some cases, trash has also been ___________ to serve as fuel.
taken
used
compacted
treated
What is a dam?
a structure which holds back the water of a river and forms a lake behind
a natural or artificial lake used as a source or store of water for an area
a device for reducing or increasing the voltage of an electric power supply
a series of circles formed by winding up a length of rope
Where does water flow before going to the turbines below?
through the centre
through pipes
by the pressure
behind the lake
How do the pipes to the turbines work?
the turbines can be opened and closed automatically
the electromagnets can be opened and closed automatically
the rushing water can be opened and closed automatically
the pipes can be opened and closed automatically
What makes the turbines go down?
the rushing water
the pipes
the electromagnets
the voltage
What is the transformer used for?
diving the turbines
transmitting the voltage to homes
stepping up the voltage
spinning the electromagnets
What are the main functions of dams?
A. to produce hydro-electric power
B. to change the lives of millions of people
C. to irrigate the hottest and least fertilized lands in the world
D. A and C are correct.
Where can dams be built to make the fullest use of the water?
behind the dams
to the desert
in series along the rivers
in series along the lakes
What is the biggest lake mentioned in the passage?
the Aswan Dam
the Kariba Dam
the Nile
a 3,220-square kilometer reservoir
In the past people could use water power to produce ___________.
electricity
water fall
electro-magnet
turbines
Men started to build ___________ to generate hydro electric power.
structures
dams
water work
factories
Dams are immense ___________ which hold back the water of a river.
lakes
buildings
reservoirs
structures
The pines to the turbines can be ___________ and ___________ automatically.
up / down
started / stopped
opened / closed
turned on / turned off
People build dams ________ along rivers so that they can make the fullest use of water.
separately
accessibly
carefully
in series
The antonym of “man-made” is ___________
ready-made
artificial
natural
hand-made
The synonym of “generate” is ___________.
use
discover
revolve
produce
The structure holding back the water of a river and forming a lake behind is a ________.
reservoir
man-made lake
turbine
dam
The rushing water dives the turbines. They ___________ and spin electro-magnets.
revolve
go around
step up
transmit
Nowadays, dams are not only used to generate power but also to _________ in farming.
produce
irrigate
transmit
spin
A transformer causes the voltage to step up before it is ___________ to home.
A. sent
B. transmitted
C. made
D. A and B are correct.
The pipe that the rushing water flows through can be up to nine meters in ___________.
diameter
circle
square
square
The voltage is ___________ before it is sent to factories or houses.
increased
transmitted
made up
generated
One of the biggest ___________ in the world is Aswan Dam.
channels
lakes
rivers
seas
