Which of the following parts of a jaw crusher is subjected to maximum wear and tear during its operation?

Mechanical Operations
Which of the following parts of a jaw crusher is subjected to maximum wear and tear during its operation?

Jaw plates

Crush shaft

Toggles

Check plates

Jaw plates

Crush shaft

Toggles

Check plates

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Mechanical Operations
In a size reduction crushing operation, feed size is 300 to 1500 mm while the product size is 100 to 300 mm. This is a case of the __________ crushing.

Fine

Secondary

Ultrafine

Primary

Fine

Secondary

Ultrafine

Primary

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Mechanical Operations
Pick out the wrong statement pertaining to the roll crushers.

Maximum feed size determines the required roll diameter

Both the rolls run necessarily at the same speed

For hard material's crushing, the reduction ratio should not exceed 4

Reduction ratio and differential roll speed affect production rate & energy consumed per unit of surface produced

Maximum feed size determines the required roll diameter

Both the rolls run necessarily at the same speed

For hard material's crushing, the reduction ratio should not exceed 4

Reduction ratio and differential roll speed affect production rate & energy consumed per unit of surface produced

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Mechanical Operations
Bond crushing law

States that the work required to form particle of any size from very large feed is proportional to the square root of the volume to surface ratio of the product

Is less realistic in estimating the power requirements of commercial crushers

States that the work required for the crushing is proportional to the new surface created

Calls for relatively less energy for the smaller product particles, than does the Rittinger law

States that the work required to form particle of any size from very large feed is proportional to the square root of the volume to surface ratio of the product

Is less realistic in estimating the power requirements of commercial crushers

States that the work required for the crushing is proportional to the new surface created

Calls for relatively less energy for the smaller product particles, than does the Rittinger law

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Mechanical Operations
Which of the following size reduction equipments employs mainly attrition for ultrafine grinding?

Micronizer

Fluid energy mill

Jet mills

All of these

Micronizer

Fluid energy mill

Jet mills

All of these

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Mechanical Operations
Bucket elevators are not suitable for the vertical lifting of __________ materials.

Fine (e.g. - 200 mesh size coal)

Sticky (e.g. clay paste)

Small lumpy (e.g. grains and sand)

Free flowing

Fine (e.g. - 200 mesh size coal)

Sticky (e.g. clay paste)

Small lumpy (e.g. grains and sand)

Free flowing

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Mechanical Operations

Mechanical Operations Which of the following parts of a jaw crusher is subjected to maximum wear and tear during its operation?

Mechanical Operations In a size reduction crushing operation, feed size is 300 to 1500 mm while the product size is 100 to 300 mm. This is a case of the __________ crushing.

Mechanical Operations Pick out the wrong statement pertaining to the roll crushers.

Mechanical Operations Bond crushing law

Mechanical Operations Which of the following size reduction equipments employs mainly attrition for ultrafine grinding?

Mechanical Operations Bucket elevators are not suitable for the vertical lifting of __________ materials.

Mechanical Operations
Which of the following parts of a jaw crusher is subjected to maximum wear and tear during its operation?

Mechanical Operations
In a size reduction crushing operation, feed size is 300 to 1500 mm while the product size is 100 to 300 mm. This is a case of the __________ crushing.

Mechanical Operations
Pick out the wrong statement pertaining to the roll crushers.

Mechanical Operations
Bond crushing law

Mechanical Operations
Which of the following size reduction equipments employs mainly attrition for ultrafine grinding?

Mechanical Operations
Bucket elevators are not suitable for the vertical lifting of __________ materials.