WorksheetsCAECW Competition
Total questions: 80
Worksheet time: 1hrs 20mins
Name
Class
Date
1.
Do you know which day is World Water Day?
a)
22nd January
b)
22nd March
c)
1st April
d)
10th October
2.
The freshwater resources available to human beings mainly refer to the freshwater resources that can be restored and ______ in a certain area year by year.
a)
renewed
b)
excavated
c)
stored
d)
consumed
3.
River runoff is mainly recharged by ______ .
a)
precipitation
b)
subsurface runoff
c)
melting of glaciers
d)
artificial groundwater recharge
4.
When the pH value of rainwater is lower than ______, it is called acid rain.
a)
5.6
b)
5
c)
6
d)
5.1
5.
The earth as a "water sphere", and the proportion of the earth's surface area that is occupied by the ocean is ______.
a)
51%
b)
71%
c)
41%
d)
61%
6.
The main uses of water include: domestic water, production water, ______.
a)
irrigation water
b)
ecological water
c)
mining water
d)
shipping water
7.
The indicator to measure the abundance of water resources in a country or region is ______.
a)
Multi-year average precipitation
b)
Multi-year average total runoff
c)
Ratio of annual precipitation to evaporation
d)
Average multi-year evaporation
8.
The country with the largest total water resources in the world is ______.
a)
America
b)
Canada
c)
Brazil
d)
Russia
9.
Which of the following rivers is a river in China?
a)
Volga River
b)
Mississippi River
c)
Yangtze River
d)
Thames River
10.
Hydraulic resources are mainly concentrated in ______ which is conducive to centralized development and export to the outside.
a)
ocean
b)
lakes
c)
rivers
d)
streams
11.
The earliest and longest man-made canal in the world is ______.
a)
Suez Canal
b)
Panama Canal
c)
Kiel Canal
d)
Beijing-Hangzhou Canal
12.
Among the following rivers, the river that flows into the Indian Ocean is ______.
a)
Pearl River
b)
Yangtze river
c)
Irtysh river
d)
Nujiang river
13.
The following countries that do not belong to South Asia are ______.
a)
Bhutan
b)
India
c)
Maldives
d)
Japan
14.
According to the statistics of the United Nations World Water Resources Development Report 2018, there are currently ______ people in the world who are experience water shortage.
a)
11 billion
b)
200 million
c)
22 billion
d)
36 billion
15.
Most of the world's water is stored in ______.
a)
ocean
b)
atmosphere
c)
land
d)
rivers
16.
______of the earth's surface is covered with water.
a)
78%
b)
90%
c)
97%
d)
70%
17.
When a solid reaches the temperature of its______ , it can become a liquid.
a)
melting point
b)
freezing point
c)
boiling point
d)
sublimation
18.
The melting point temperature of water is ______.
a)
100℃
b)
0℃
c)
0℉
d)
100℉
19.
Evaporation refers to water from______.
a)
gas becomes solid
b)
liquid becomes solid
c)
solid becomes liquid
d)
liquid becomes gas
20.
After a student took a shower, he observed water droplets condensing in the bathroom mirror. Water condenses on the mirror, because the mirror ______.
a)
reflects light energy
b)
is cooler than air
c)
is a large plane surface
d)
easy to gather water vapor.
21.
For water transfer, it requires a comprehensive planning and scientific evidence, taking into account the water needs of the transfer out and into the basin, to prevent damage to ______.
a)
ecological environment
b)
transportation
c)
communication facilities
d)
farmland
22.
The following practices that can cause ice to melt is ______.
a)
wrapping the ice cubes with aluminum foil
b)
heating the ice cubes
c)
Put the ice cubes in a cool place
d)
Put the ice cubes in the refrigerator.
23.
The chemical composition of water is ______
a)
HO
b)
H2O
c)
H3O
d)
HO2
24.
Which of the following may cause water pollution?
a)
the water temperature is too high
b)
there is too much dissolved oxygen in the water
c)
the phosphorus content in the water is low
d)
the ammonia nitrogen content in the water is low.
25.
About ______ of the water in the world is fresh water.
a)
0.1%
b)
2.6%
c)
50%
d)
97%
26.
Which of the following is a mountain range in Asia?
a)
the Andes
b)
the Alps
c)
the Himalayas
d)
the Atlas
27.
What type of water pollution does the lead element in water exceed the standard?
a)
organic pollution
b)
inorganic pollution
c)
nutrient pollution
d)
healing organics
28.
Why does algal bloom occur?
a)
eutrophication of water body
b)
excessive fish in water
c)
low turbidity in water
d)
all of the above.
29.
Which of of the following rivers is not a Southeast Asian river ______?
a)
Mekong River
b)
Chao Phraya River
c)
Nile River
d)
Salween River
30.
Which of the following irrigation methods can avoid the waste of water resources to the greatest extent?
a)
sprinkler irrigation
b)
slope irrigation
c)
drip irrigation
d)
flood irrigation
31.
With coal, oil, natural gas, etc. as fuel, the chemical energy of the fuel is converted into heat energy, and then the heat energy is converted into mechanical energy with the help of thermal machinery such as steam turbine, and the generator driven by the steam turbine converts the mechanical energy into electrical energy. This kind of power plant is called ______.
a)
wind power plant
b)
thermal power plant
c)
hydraulic power plant
d)
nuclear power plant
32.
The function of the lightning conductor/ lightning rod is ______.
a)
Prevent direct lightning strikes
b)
prevent induced lightning
c)
prevent lightning from invading waves.
d)
limit the short-circuit current
33.
The network that directly sends electric energy to users is called ______
a)
power generation network
b)
power transmission network
c)
power distribution network
d)
substation network
34.
The red wire in the three-wire cable represents ______.
a)
Null Line
b)
Live Line
c)
Earth Line
d)
Neutral Line
35.
Lightning discharge has the characteristics of ______.
a)
high current, high voltage
b)
low current, high voltage
c)
high current, low voltage
d)
low current, low voltage
36.
The magnitude of the current is expressed by the current intensity, and its value is equal to the algebraic sum of the cross section ______ of the conductor in unit time.
a)
current
b)
electric quantity (charge)
c)
current intensity
d)
power
37.
Semiconductor resistance increases with temperature ______.
a)
does not change
b)
increases
c)
decreases
d)
is not constant
38.
Wind power generation is to convert ______ of air flow into electric energy.
a)
kinetic energy
b)
static energy
c)
potential energy
d)
mechanical energy
39.
Take "kWh" as the unit of measurement of ______ in the power system
a)
voltage
b)
electric energy
c)
electric power
d)
potential
40.
When the circuit is in the state of ______, the current in the circuit will damage the power supply, burn wires and even cause serious accidents such as fire.
a)
path circuit
b)
break circuit
c)
short circuit
d)
open circuit
41.
Urban landscaping should choose drought-tolerant flowers and trees. Irrigation of green space, trees and flowers, and promotion of water-saving irrigation methods such as ______.
a)
micro-sprinkler irrigation
b)
drip irrigation
c)
sprinkler irrigation
d)
flood irrigation
42.
At present, freshwater resources that are easily exploited by humans include ______.
a)
surface water
b)
shallow groundwater
c)
deep groundwater
d)
atmospheric water
43.
The main indicators to characterize the physical properties of natural water are ______.
a)
temperature
b)
color
c)
dissolved gas
d)
suspended matter
44.
Physical properties of water include ______.
a)
COD
b)
temperature
c)
total microorganism
d)
turbidity
45.
There are many reasons for the shortage of water resources and water stress. The following statements that are related are ______.
a)
uneven spatial and temporal distribution of water resources
b)
serious water pollution and waste.
c)
human demand for fresh water increases
d)
water conservancy projects are built
46.
Cities in China are ______.
a)
Beijing
b)
Shanghai
c)
Guangzhou
d)
Sydney
47.
Countries belonging to Southeast Asia are ______.
a)
America
b)
Malaysia
c)
Philippines
d)
Indonesia
48.
Water pollutants can be ______.
a)
biological pollutants
b)
temperature pollutants
c)
physical pollutants
d)
radioactive pollutants
49.
Common irrigation methods include ______.
a)
sprinkler irrigation
b)
slope irrigation
c)
drip irrigation
d)
flood irrigation
50.
What are the physical forms of water?
a)
liquid
b)
solid
c)
vapor
d)
I don’t know
51.
Rivers belonging to Southeast Asia are ______.
a)
Volga River
b)
Mekong River
c)
Chao Phraya River
d)
Mississippi River
52.
Cities that belong to the capitals of Asian countries are ______.
a)
Beijing
b)
Bangkok
c)
Paris
d)
Kuala Lumpur
53.
Which of the following measures belongs to engineering measures?
a)
flood warning
b)
curve straightening
c)
dam
d)
flood hazard map
54.
The following renewable energy sources are ______.
a)
hydrogen energy
b)
water energy
c)
biomass energy
d)
wave energy
55.
Electric vehicle charging modes mainly include ______.
a)
AC charging
b)
DC charging
c)
On-board charging
d)
Battery replacement
56.
Power plants are mainly classified according to energy sources. The following that belong to new energy power plants are______.
a)
wind power plant
b)
hydroelectric power plant
c)
solar power plant
d)
geothermal power plant
57.
The advantages of using high voltage to transmit electric energy are ______.
a)
convenient to construction
b)
reduce wire loss
c)
increasing power transmission
d)
increasing transmission distance
58.
______ of electric energy is completed at the same instant.
a)
production
b)
transportation
c)
distribution
d)
use
59.
In the operation of the transformer, ______ must be grounded.
a)
neutral point
b)
External case
c)
one end of the metal core
d)
two ends of the metal core
60.
The advantages of hydropower plants are ______.
a)
low power generation cost, high efficiency
b)
can be integrated use of water resources
c)
Hydroelectric energy can be saved and transferred
d)
Hydroelectric power generation does not pollute the environment
61.
Water is a universal solvent.
a)
True
b)
False
62.
There is less water on the earth today than ten thousand years ago.
a)
True
b)
False
63.
The largest water body in the world is the Arctic Ocean.
a)
True
b)
False
64.
Chemical fertilizer is more effective than organic fertilizer.
a)
True
b)
False
65.
Rajang River is a river in Malaysia.
a)
True
b)
False
66.
Dams are only man-made.
a)
True
b)
False
67.
Beijing is the capital of China.
a)
True
b)
False
68.
Floods are the most common natural disasters.
a)
True
b)
False
69.
Seawall protects coastal land; Dams protect the land near rivers and lakes.
a)
True
b)
False
70.
Renewable energy is an energy that does not replenish itself over time.
a)
True
b)
False
71.
The most common plant in the swamp is aquatic plants.
a)
True
b)
False
72.
Crocodiles can live in wetlands.
a)
True
b)
False
73.
Algae can't survive in the ocean.
a)
True
b)
False
74.
New York is the capital of the United States.
a)
True
b)
False
75.
Due to the frequent use of electricity in cities, electric shock accidents are more common in cities than in rural areas.
a)
True
b)
False
76.
Electric burn, electric brand and electric metalization are electric injuries.
a)
True
b)
False
77.
The current of 0.1A is too small to be fatal.
a)
True
b)
False
78.
Alternating current is more dangerous than direct current of the same strength.
a)
True
b)
False
79.
Under any circumstances, 36V is safe voltage.
a)
True
b)
False
80.
The occurrence of electric shock accidents is seasonal.
a)
True
b)
False
100 %
