2020 Electrical Equipment（沈丽1709E）(沈阳工程学院) 最新满分章节测试答案

本答案对应课程为:点我自动跳转查看
本课程起止时间为:2020-03-02到2020-07-12
本篇答案更新状态:已完结

Unit 1 Energy & Generation Unit 1 TEST

1、 问题: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、 问题: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、 问题: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、 问题: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、 问题: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、 问题: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、 问题:Thermal power plant energy chain: Chemical energy–(               )–Mechanical energy–Electrical energy.
答案: 【Heat energy】

8、 问题:Hydroelectric power plant energy chain: (               )–Mechanical energy — Electrical energy.
答案: 【Water Potential Energy】

9、 问题:There are three main equipment in a hydroelectric power plant, pressure pipe, (             ) and generator. 
答案: 【water turbine】

10、 问题:Nuclear power plant energy chain: (              ) — Thermal energy — Mechanical energy -Electrical energy
答案: 【Nuclear fission energy】

11、 问题:Wind power plant energy chain: (          ) — Mechanical energy–electrical energy
答案: 【Air kinetic energy】

12、 问题:Photovoltaic power plant energy chain: (            ) — electrical energy
答案: 【(以下答案任选其一都对)solar radiation energy;
sunlight radiation energy】

Unit 2 High-voltage switching device Unit 2 TEST

1、 问题:(      ) 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、 问题: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、 问题: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、 问题: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、 问题: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、 问题: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、 问题: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、 问题:The maximum operating voltage for equipment with rated voltage of 330kV and 500kV is (    ) times of rated voltage.
选项：
A:1.1
B:1.15
C:1.2
D:1.3
答案: 【1.1】

9、 问题: (     ) of the circuit breaker is the time interval from the moment the circuit breaker receives the switching order to the moment when all phase arcs of the circuit breaker are finally extinguished.
选项：
A:The Switch-off (Breaking) time 
B:Inherent switching time
C:Arc time
D:Automatic reclosing time
答案: 【The Switch-off (Breaking) time 】

10、 问题:Type ZN4-10/600 circuit breakers can be used in circuits with a maximum continuous operating current of (    ).
选项：
A:600A
B:10kA
C:600KA
D:10A
答案: 【600A】

11、 问题:LW6-500 is an outdoor 500kV high voltage (     ).
选项：
A:Vacuum circuit breaker
B:SF6 circuit breaker
C:Oil circuit-breaker
D:Air circuit breaker
答案: 【SF6 circuit breaker】

12、 问题:Rated breaking current is the (    ) that the circuit breaker can be safely broken at rated voltage.
选项：
A:Normal operating current
B:Overload current
C:Short-circuit current
D:No-load current
答案: 【Short-circuit current】

13、 问题:One of the USES of the high voltage isolator is (     ).
选项：
A:Cut off the load current
B:Cut off the short-circuit current
C:Close-break small current loop
D:Close-break large current loop
答案: 【Close-break small current loop】

14、 问题:The isolating switch model is GN2-10/1000, meaning (     ).
选项：
A:Rated voltage 2KV, rated current 10A
B:Rated voltage 2KV, rated current 1000A
C:Rated voltage 10KV, rated current 1KA
D:Rated voltage 10KV, rated current 10KA
答案: 【Rated voltage 10KV, rated current 1KA】

15、 问题:When the high-voltage isolator and circuit breaker are used in series, the operation sequence of power failure is (     ).