According to Taggart's rule for selecting between a gyratory crusher and a jaw c

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Question
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
Options
A. 0.00184
B. 0.0184
C. 0.184
D. 1.84

Correct Answer

0.0184

2. The most suitable equipment used to devulcanise rubber scrap and to make water dispersion & rubber solution is a
Options
A. boundary mixer.
B. propeller agitator.
C. sharpies centrifuge.
D. none of these.

4. Pick out the wrong statement.
Options
A. Gape is the greatest distance between the crushing surfaces or the jaws.
B. The angle of nip (2?) is the angle between roll faces at the level where they will j ust take hold of a particle and draw it in the crushing zone.
C. Crushing efficiency is the ratio of the energy absorbed by the solid to the surfaces energy created by crushing.
D. Reduction ratio is the ratio of the maximum size of the particles in the feed to that in the product.

6. The constants (Kb, Kr and Kk) used in the laws of crushing (i.e., Bond's law, Rittinger's law and Kick's law) depend upon the
Options
A. feed material.
B. type of crushing machine.
C. both (a) & (b).
D. neither (a) nor (b).

8. A suspension of glass beads in ethylene glycol has a hindered settling velocity of 1.7 mm/s, while the terminal settling velocity of a single glass bead in ethylene glycol is 17 mm/s. If the Richardson-Zaki hindered settling index is 4.5, the volume fraction of solids in the suspension is
Options
A. 0.1
B. 0.4
C. 0.6
D. none of these

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