Mining crushers are critical machines used in the mining industry to crush and process raw materials. Below are some key objective questions and answers related to mining crushers:
Question:
A mining crusher is primarily used for:
a) Drilling holes in the earth
b) Crushing rocks and ores into smaller sizes
c) Sorting minerals by weight
d) Grinding minerals to powder
Answer:
b) Crushing rocks and ores into smaller sizes
A mining crusher is used to reduce large rocks into smaller, manageable pieces for further processing.
Question:
Which of the following is not a type of mining crusher?
a) Jaw Crushers
b) Cone Crushers
c) Ball Mills
d) Impact Crushers
Answer:
c) Ball Mills
Ball mills are grinding devices used for processing materials after the crushing stage, not crushers themselves.
Question:
The primary crusher is mainly used for:
a) Refining minerals
b) Processing finished goods
c) Initial size reduction of raw materials
d) Transporting minerals
Answer:
c) Initial size reduction of raw materials
A primary crusher is the first stage in the crushing process; it handles large chunks of raw materials.
Question:
Crusher jaws and cones are typically made of:
a) Aluminum
b) High manganese steel
c) Plastic
d) Copper
Answer:
b) High manganese steel
High manganese steel is used due to its durability and resistance to wear, especially for crushing hard materials.
Question:
A secondary crusher is used to:
a) Transport ore
b) Perform the initial size reduction
c) Further reduce the size of the material after the primary crusher
d) Process finished mineral products
Answer:
c) Further reduce the size of the material after the primary crusher
Secondary crushers are used after the primary crusher to achieve finer material sizes.
Question:
The following crushers are suitable for tertiary crushing (fine crushing):
a) Hammer crusher
b) Roll crusher
c) Cone crusher
d) Gyratory crusher
Answer:
c) Cone crusher
Cone crushers are widely used for tertiary crushing due to their ability to produce finely crushed materials.
Question:
The principle of operation of a jaw crusher involves:
a) Rotating hammers that crush the material
b) A mantle and concave crushing the material
c) Compression between two jaws to reduce size
d) Continuous grinding
Answer:
c) Compression between two jaws to reduce size
Jaw crushers operate by compressing material between a stationary jaw and a moving jaw.
Question:
Cone crushers are preferred over jaw crushers for:
a) Handling sticky materials
b) Producing finer particle sizes
c) Being easier to maintain
d) Crushing larger rocks
Answer:
b) Producing finer particle sizes
Cone crushers are better suited for secondary and tertiary crushing, producing finer output.
Question:
Compared to jaw crushers, gyratory crushers:
a) Can process larger materials
b) Are cheaper and easier to maintain
c) Are less efficient for primary crushing
d) Use horizontal motion instead of compression
Answer:
a) Can process larger materials
Gyratory crushers are often used for primary crushing when handling very large material.
Question:
Mining crushers are equipped with safety features such as:
a) Sensors for high temperatures
b) Automatic lubrication systems
c) Overload protection and tramp release mechanisms
d) Secured bolts for raw material handling
Answer:
c) Overload protection and tramp release mechanisms
These features prevent damage to the crusher and ensure safety during operation.
This set of objective questions is designed to cover essential aspects of mining crushers, from types and functionalities to materials and safety mechanisms.
Shanghai Zenith Mineral Co., Ltd. jẹ́ aṣáájú ẹgbẹ́ iṣelọpọ ti ẹ̀rọ gígùn àti ẹ̀rọ mimu ni Ṣáínà. Pẹ̀lú iriri to ju ọdún 30 lọ ni ile-iṣẹ ẹrọ iwakusa, Zenith ti kọ orúkọ tó lágbára fún pípè ní àjà ti àwòpọ́, awọn ọna abáyọ, àwọn ẹrọ ṣiṣe iyan, àti awọn ohun elo ìtòsí mineral sí àwọn oníbàárà ni gbogbo agbáyé.
Ile-iṣẹ naa ti wa ni ile-iṣẹ rẹ ni Shanghai, China, Zenith ni iṣọpọ iwadi, iṣelọpọ, tita, ati iṣẹ, n pese awọn ọna isọdọkan pipe fun awọn akopọ, iwakusa, ati ile-iṣẹ gige ohun alumọni. Ohun elo rẹ ti wa ni lilo ni ibigbogbo ni metallurgy, ikole, injinia kemikali, ati aabo ayika.
Nítorí ìtẹ́numọ́ sí ìmọ̀ tuntun àti ìtẹ́lọ́run oníbàárà, Shanghai Zenith ń bá a lọ nínú ikole amí, àti iṣelọpọ aláwọ̀ pẹlẹbẹ, ń fúnni ní ẹ̀rọ tó dájú àti iṣẹ́ pẹ̀yà lẹ́yìn-tí-a-sá-n-pè láti ràn àwọn oníbàárà lọ́wọ́ kí wọ́n lè ní iṣẹ́ tó ní ìmúrasílẹ̀ àti tó ní àyè ìtẹ́siwaju.
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