Chapter 4

Question 1

consists of a helicoid helix or a sectional flight mounted on a pipe or shaft that rotates in a trough

Answer 1

Screw Conveyors

Question 2

can transport solids for many kilometres at speeds up to 5m/s and handle up to 4500t (m/hr;narrow –flat are used for small quantities

Answer 2

belt conveyors

Question 3

employ a chain supported conveying element that is transversely pulled through the solid being transported

Answer 3

Continuous flow conveyors

Question 4

are used in the crushing of hard materials and usually are followed by other crushers for further size reduction

Answer 4

Jaw and gyratory crushers

Question 5

best for breaking/crushing of tough fibrous or sticky materials

Answer 5

Impact crusher

Question 6

-commonly used for both primary and
secondary crushing of friable solids

Answer 6

Roll crushers-

Question 7

–appropriate for crushing medium
–hard and soft materials and minerals

Answer 7

Dry pan crushers

Question 8

efficiency is relatively low for size reduction of tough or resilient particle

Answer 8

Size reduction mills

Question 9

Primary applications of vibratory millsare in fine milling of medium to hard materials, generally in dry form,

Answer 9

Fine grinding mills

Question 10

commonly employed to cut soft and fibrous materials into smaller dimension

Answer 10

Cutting-rotary cutters