Which of the following is a fine crusher?

Which of the following crushers can be considered as a combination of a jaw crusher and a roller crusher?

A

Rod mill

B

Fluid energy mill

C

Gyratory crusher

D

Ball mill

According to Taggart's rule for selecting between a gyratory crusher and a jaw crusher; the later should be used, if the hourly tonnage to be crushed divided by the square of the gape expressed in cm is less than

A

0.00184

B

0.0184

C

0.184

D

1.84

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

A

check plates

B

jaw plates

C

toggles

D

crush shaft

Which of the following is a coarse crusher?

A

Smooth roll crusher

B

Toothed roll crusher

C

Gyratory crusher

D

Tube mill

Which of the following comes in the category of primary crusher for hard and tough stone?

A

Jaw crusher

B

Cone crusher

C

Gyratory crusher

D

None of these

Which of the following is not a part of the Blake jaw crusher?

A

Hanger

B

Check plates

C

Toggles

D

Pitman

In case of a hammer crusher, the

A

Feed may be highly abrasive (Moh's scale >5)

B

Minimum product size is 3 mm

C

Maximum feed size may be 50 mm

D

Rotor shaft carrying hammers can be vertical or horizontal

During size reduction by a jaw crusher, the energy consumed decreases with the

A

Decreasing size of product at constant size of feed

B

Decreasing machine capacity

C

Increasing size of feed at constant reduction ratio

D

None of these

Capacity (in tons/hr) of jaw/gyratory crusher is equal to (where, L = length of the receiving opening, cm S = greater width of the discharge opening, cm)

A

0.01 L.S

B

0.087 L.S

C

L.S

D

$$\frac{{{\text{L}}.{\text{S}}}}{{0.087}}$$

In a roll crusher, both the rolls

A

Have the same diameter

B

Are rotated towards each other

C

Run either at the same or different speeds

D

All of the above

Which of the following is a fine crusher?

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