2018 Mine Dust Control（矿井粉尘防治）(中国矿业大学) 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:2018-12-28到2018-12-28
本篇答案更新状态:已完结

【作业】9 Dust Control in Minerals Mining and Processing (1) Chapter 9 Assignment

1、 问题:Please list the keys to effective wet spray dust control.
评分规则: 【 proper application of moisturecareful nozzle location controlling droplet sizechoosing the best spray patternspray nozzle typeproper maintenance of equipment
】

9 Dust Control in Minerals Mining and Processing (1) Chapter 9 Exam

1、 问题:Screening operations can not produce high levels of dust. 
选项：
A:正确
B:错误
答案: 【错误】

2、 问题:Control of dust generated by these operations can be achieved with proper analysis of the sources, identification of appropriate control technologies, and consistent application and maintenance of selected controls.
选项：
A:正确
B:错误
答案: 【正确】

3、 问题:Wet dust control systems can be very effective but are more costly to install and operate.
选项：
A:正确
B:错误
答案: 【错误】

4、 问题:The drilling process is only used in underground mines for blasting operations . 
选项：
A:正确
B:错误
答案: 【错误】

5、 问题:Water separation can be achieved through the use of a water separator sub.
选项：
A:正确
B:错误
答案: 【正确】

6、 问题:Dry drilling is accomplished without the use of water for dust control. 
选项：
A:正确
B:错误
答案: 【正确】

7、 问题:The purpose of the next two presentions is to                 for lowering respirable crystalline silica dust at mineral processing operations.
答案: 【summarize current state-of-the-art control technology available】

8、 问题: Fines are                          , thus decreasing its ability to become airborne.
答案: 【wetted each dust particle’s weight increases】

9、 问题:The most commonly used spray nozzles produce                  ,                 ,                     or                      .
答案: 【full cone, hollow cone, round, flat fan patterns】

10、 问题:When water is used to control dust, it has only a limited                     due to evaporation, and will need to be reapplied at various points throughout the process to remain effective.
答案: 【residual effect】

11、 问题:The drilling process is used in both surface and underground mines for                       which are conducted to fragment the rock.
答案: 【blasting operations】

12、 问题:             ,              and                    can be major sources of airborne dust due to the inherent nature of size reduction and segregation processes.
答案: 【Mineral crushing, milling, screening operations】

10 Dust Control in Minerals Mining and Processing (2) Chapter 10 Exam

1、 问题:In order to realize the dust control benefits of the discharge cone, the loading spout must be properly positioned to minimize the chance of dust escaping into the ambient air during loading.
选项：
A:正确
B:错误
答案: 【正确】

2、 问题:For the most effective dust control and to prevent clogging of the loading spout, it is important that the spout position be periodically raised as the height of the loaded material increases. 
选项：
A:正确
B:错误
答案: 【正确】

3、 问题:A belt wash system sprays the conveyor belt with cement while simultaneously scraping it to remove the product.
选项：
A:正确
B:错误
答案: 【错误】

4、 问题:Screw conveyors are totally opened except at the ends.
选项：
A:正确
B:错误
答案: 【错误】

5、 问题:Skirtboards are employed to retain material on the belt after leaving the loading chute and until the material reaches belt speed. 
选项：
A:正确
B:错误
答案: 【正确】

6、 问题:At mineral processing operations ,workers can not exposure dust from contaminated work clothing.
选项：
A:正确
B:错误
答案: 【错误】

7、 问题:The basic principle behind the total structure ventilation design is to use inside air to sweep up through a building to clear and remove the dust-laden air. 
选项：
A:正确
B:错误
答案: 【错误】

8、 问题:The four factors translate to the four dust control measures:Surface roughness,water,coatings,and wind.
选项：
A:正确
B:错误
答案: 【错误】

9、 问题:The                 is designed to transfer product from a plant/storage container into the vehicle that will be used to transport the product.
答案: 【loading spout】

10、 问题:During the bulk loading of product, dust contained within the product can be liberated and emitted into the ambient air as the product falls from the             to the               .
答案: 【loadout area ,transport container】

11、 问题:Proper selection of the correct type of equipment is a function of the specific application, taking into account the material to be transferred,                 , and nature of the transfer.
答案: 【transfer distance】

12、 问题:In almost all cases, a worker uses an                     to manually exhaust the product and dust into the collector system.
答案: 【exhaust system collector device】

13、 问题:The most common method of dust control on haul roads is using               with water being the most common.
答案: 【dust suppressants】

【作业】10 Dust Control in Minerals Mining and Processing (2) Chapter 10 Assignment

1、 问题:The most prevalent location for material spillage is at transfer points. Material may be deposited virtually anywhere along a conveyor, but always leaves the conveyor at the head pulley. What are the four steps used in order to effectively control material at transfer points?
评分规则: 【 1.    Feeding material onto the belt in the direction of travel and at the same speed as the receiving conveyor.2.    Keeping the fed material centered on the conveyor belt.3.    Minimizing the transfer distance which, in turn, minimizes material impact on the belt and air entrainment within the material.4.    Using skirtboard ("skirting") to manage the loaded material as it travels on the belt.
】

【作业】11 Dust Control in surface Mining Chapter 11 Assignment

1、 问题:What are the key factors for controlling dust from the primary dump?
评分规则: 【 Enclose the primary hopper dump.Use water sprays to suppress the dust in the enclosure. Prevent the dust from rolling back under the dump vehicle.
】

11 Dust Control in surface Mining Chapter 11 Exam

1、 问题:Air filtration is often part of the                as an engineering control for airborne dusts.
选项：
A:HVAP system
B:HVAM system
C:HVAC system
D:HNAP system
答案: 【HVAC system】

2、 问题:Dust emission reductions of greater than 63% were measured by the collector discharge dump after installing an extended shroud near ground level Maintain a collector-to-bailing airflow ratio of at least             . 
选项：
A:1:3
B:3:1
C:4:1
D:1:4
答案: 【3:1】

3、 问题:A              is recommended to reduce the dust liberated due to rollback under the dumping mechanism.
选项：
A:water spray system
B:tire-stop water spray system
C:local exhaust ventilation system
D:tire water spray system
答案: 【tire-stop water spray system】

4、 问题:Many practical areas of engineering controls designed to mitigate exposure of surface mine workers to all airborne dusts, including silica, are：
选项：
A:drill dust collection systems
B:enclosed cab filtration systems
C:controlling dust on unpaved haulage roads
D:controlling dust at the primary hopper dump
答案: 【drill dust collection systems;
enclosed cab filtration systems;
controlling dust on unpaved haulage roads;
controlling dust at the primary hopper dump】

5、 问题:Adding excessive water down the hole can cause operational problems with appreciable improvement in dust control.
选项：
A:正确
B:错误
答案: 【错误】

6、 问题: Enclosed cab filtration systems are one of the mainstay engineering controls for reducing mobile equipment operators’ exposure to airborne dust at surface mines.
选项：