大学MOOC ElectricalEquipment（沈丽1709E）(沈阳工程学院)1452453172 最新慕课完整章节测试答案
Unit1Energy&Generation
文章目录
Unit1TEST
1、单选题：
Photovoltaic power plants convert solar radiation energy( ) into electrical energy.
选项：
A: Thermal energy
B: Mechanical energy
C: Solar radiation energy
D: Chemical energy
答案: 【 Solar radiation energy】
2、单选题：
Electrical equipment that directly produces, converts, and distributes electrical energy is called ( ).
选项：
A: Primary equipment
B: Secondary equipment
C: None
D: Both
答案: 【 Primary equipment 】
3、单选题：
In the power system, （ ）can play the role of peak and valley load shifting.
选项：
A: Dam-rear power plant
B: Block power plant
C: Pumped-storage power plant
D: Geothermal Power Plant
答案: 【 Pumped-storage power plant】
4、单选题：
When the whole（ ） is cut off, the power system will be disconnected or even paralyzed.
选项：
A: Intermediate substation
B: Hub substation
C: District substation
D: Terminal substation
答案: 【 Hub substation】
5、单选题：
Which of the following devices are not secondary devices ( ).
选项：
A: Measuring meter
B: Control and signaling device
C: DC power equipment
D: Current transformer
答案: 【 Current transformer】
6、单选题：
Which of the following is not a function of the primary device ( ).
选项：
A: Generating of electrical energy
B: Converting electrical energy
C: Transporting and distributing electrical energy
D: Control and protection
答案: 【 Control and protection】
7、填空题：
Thermal power plant energy chain: Chemical energy--( )--Mechanical energy--Electrical energy.
答案: 【 Heat energy】
8、填空题：
Hydroelectric power plant energy chain: ( )--Mechanical energy -- Electrical energy.
答案: 【 Water Potential Energy】
9、填空题：
There are three main equipment in a hydroelectric power plant, pressure pipe, ( ) and generator.
答案: 【 water turbine】
10、填空题：
Nuclear power plant energy chain: ( ) -- Thermal energy -- Mechanical energy -Electrical energy
答案: 【 Nuclear fission energy】
11、填空题：
Wind power plant energy chain: ( ) -- Mechanical energy--electrical energy
答案: 【 Air kinetic energy】
12、填空题：
Photovoltaic power plant energy chain: ( ) -- electrical energy
答案: 【 solar radiation energy##%_YZPRLFH_%##sunlight radiation energy】
Unit2High-voltageswitchingdevice
Unit2TEST
1、单选题：
( ) is an electrical device used to close or break the normal working current, overload current or short-circuit current of a circuit and has an arc extinguishing device.
选项：
A: Circuit-breaker
B: Isolator
C: Fusible cutout
D: Load switch
答案: 【 Circuit-breaker】
2、单选题：
Near-cathode effect: when the arc current naturally crosses zero, the initial dielectric strength of ( ) immediately appears in the arc gap within a very short period of time (about 0.1-1.0s).
选项：
A: 60-100V
B: 150-250V
C: 200-300V
D: 400-500V
答案: 【 150-250V】
3、单选题：
Basic conditions for extinguishing the arc:( )
选项：
A: Ionization velocity > Deionization velocity
B: Ionization velocity = Deionization velocity
C: Ionization velocity < Deionization velocity
D: None of the above
答案: 【 Ionization velocity < Deionization velocity】
4、单选题：
Which of the following is not a characteristic of ac arc ( )
选项：
A: Dynamic characteristic
B: Thermal inertia
C: Natural zero crossing
D: Stable
答案: 【 Stable】
5、单选题：
In the contact gap of circuit breaker, the electric arc combustion is maintained by ( ).
选项：
A: Thermal ionization
B: Electric field ionization
C: Strong electric field emission
D: Hot electron emission
答案: 【 Thermal ionization】
6、单选题：
Which of the following is not the role of high-voltage circuit breaker ? ( )
选项：
A: Switch on and off various load circuits under normal conditions
B: Automatically and quickly switch off the fault current under fault conditions
C: Realize the function of automatic reclosing
D: Switching voltage level
答案: 【 Switching voltage level】
7、单选题：
According to the national standard, for equipment with rated voltage of 220KV and below, the highest working voltage is ( ) times of rated voltage.
选项：
A: 1.1
B: 1.15
C: 1.2
D: 1.3
答案: 【 1.15】
8、单选题：
The maximum operating voltage for equipment with rated voltage of 330kV and 500kV is ( ) t