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起止时间:2020-12-09到2021-06-30
更新状态:每5天更新一次
Chapter1 Introduction Unit quiz
1、 In 2018, the total output of six coal enterprises with a coal output of more than 100 million tons accounted for ( )% of the total output of China.
A:29
B:45
C:63
D:50
答案: 29
2、 1toc refers to 1 ton standard coal. So how many kilocalories is the heat generated by the complete combustion of 1 kg standard coal？ ( )
A:7000
B:8000
C:5000
D:10000
答案: 7000
3、 In terms of equivalent calorific value, the lowest price among coal, oil, natural gas and renewable energy is ( ).
A:oil
B:coal
C:renewable energy
D:natural gas
答案: coal
4、 According to the national coal resource potential evaluation, the total amount of resources explored in China is ( ).
A:2.02 trillion tons
B:1.32 trillion tons
C:3.82 trillion tons
D:5.62 trillion tons
答案: 2.02 trillion tons
5、 At present, the world’s major fossil energy sources include ( ).
A:coal
B:oil
C:natural gas
D:geothermal
答案: coal;
oil;
natural gas
6、 Which of the following are common energy units? ( )
A:tce
B:toe
C:kW
D:MW
答案: tce;
toe
7、 Which of the following are secondary energy sources? ( )
A:electric power
B:gasoline
C:residual heat of power plant
D:coal
答案: electric power;
gasoline;
residual heat of power plant
8、 Coal can be used more cleanly. Supercritical coal-fired power generation technology has been successfully studied, which can achieve nearly zero emissions.
A:正确
B:错误
答案: 正确
9、 In the future, China’s energy consumption will still be dominated by fossil energy, in which coal is the main energy.
A:正确
B:错误
答案: 正确
10、 Rich in coal, abundant in oil and gas, while coal is the most important basic energy and raw material in China.
A:正确
B:错误
答案: 错误
11、 For many years, coal has accounted for more than 60% of China’s total energy consumption. Although it fell to 59% in 2018, coal is still the main energy to maintain national energy security.
A:正确
B:错误
答案: 正确
12、 In 2018, coal accounted for % of the world’s energy consumption.
答案: 27
13、 Coal industry will be upgraded from labor-intensive to technology intensive, and develop into a new industry with characteristics.
答案: high-tech
14、 Coal industry must take the road of green, and safe mining.
答案: intelligent
15、 In 2018, if China’s accumulated explored coal reserves are divided into eastern, central and western regions by geographical location, the most explored coal reserves are in the region.
答案: western
Chapter 3 Mining technology of long wall caving mining method Unit quiz
1、 Which is the applicable condition of uni-directional cutting? ( )
A:Good loading effect of shearer
B:It is easy for upward mining of shearer
C:The inclination of coal seam is small, and the support and scraper conveyor are not easy to slide down
D:The inclination of coal seam is large, and the support and scraper conveyor are easy to slide down
答案: The inclination of coal seam is large, and the support and scraper conveyor are easy to slide down
2、 Which of the following is not a timely support advantage? ( )
A:Timely support roof
B:Small width of roof control
C:Good for transporting materials
D:Good for ventilation
答案: Small width of roof control
3、 Which of the following types of work are all types of work in the fully mechanized working face? ( )
A:Specialized work
B:Comprehensive type of work
C:Professional and comprehensive work
D:None of these items
答案: Professional and comprehensive work
4、 Which of the following forms of labor organization work is shown as when the shearer cuts coal, each professional group follows the Shearer to complete all work in time? ( )
A:Sectional work
B:Segmental chasing operation
C:Chasing operation
D:Mixed Work
答案: Chasing operation
5、 Which of the following is true about the sliding plough? ( )
A:Automatic drag of planer head by planer chain
B:The planer head is guided by the slide frame, and the planer chain pulls the planer head to work in the slide frame
C:Dynamic movement of planer head
D:The planer head slides on the bottom plate
答案: The planer head is guided by the slide frame, and the planer chain pulls the planer head to work in the slide frame
6、 Which of the following is applicable to the coal plough? ( )
A:The quality of coal is medium hard or above. It does not stick to the roof and can contain large hard dirt
B:The floor is flat, and there is no requirement for the hardness of coal seam
C:There are large faults and folds along the strike and dip direction of coal seam
D:The thickness of coal seam is less than 2m and the dip angle is small
答案: The thickness of coal seam is less than 2m and the dip angle is small
7、 What are the problems caused by the increase of mining height? ( ）
A:Increase of mine pressure
B:Poor stability of coal wall
C:Prone to roof fall
D:No obvious difference with thin coal seam mining
答案: Increase of mine pressure
8、 Large mining height fully mechanized working face refers to the working face with mining height greater than ( ) m.
A:3.5
B:5
C:4.5
D:6
答案: 3.5
9、 Automatic (intelligent) working face scraper conveyor control technology includes ( ).
A:Comprehensive online monitoring and fault diagnosis
B:Automatic control of tail extension
C:Automatic control and frequency conversion control of hydraulic coupling
D:Centralized automatic control
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