Screening Flashcards
The minimum clear space between the edges of the opening in the screening surface and is usually given in inches or millimeters
a. sieve
b. aperture
c. mesh number
d. hole
b. aperture
The material passing one screening surface and retained on a subsequent surface is called
a. intermediate material
b. minus material
c. plus material
d. none of these
a. intermediate material
The screen used in making size separation smaller than 4-mesh and larger than 48 mesh
a. grizzly screen
b. gyratory screen
c. oscillating screen
d. vibrating screen
d. vibrating screen
Box like machines, either round or square with a series of screen clothes nested atop one another.
a. reciprocating screen
b. oscillating screen
c. electricity vibrating screen
d. gyratory screen
d. gyratory screen
The removal of a small amount of oversize from a feed which are predominantly fines is called
a. scalping
b. desliming
c. coarse separation
d. separation
a. scalping
Removal of free water from a solids-water mixture and is generally limited to 4 mesh and above
a. scalping
b. dewtering
c. trash removal
d. separation
b. dewatering
Making a size separation smaller than 48 mesh is called
a. coarse separation
b. fine separation
c. ultrafine separation
d. scalping
c. ultrafine separation
Another name for revolving sceen is
a. shaking screen
b. vibrating screen
c. mechanically vibrated screen
d. trommel screen
d. trommel screen
The mesh number of screen denotes
a. area of screen in square mesh
b. the number of opening per linear inch of screen
c. the number of layers in a screen system
d. the number of screen needed to obtained the required fines
b. the number of opening per linear inch of screen
Material which remain on a screen surface are called
a. fines
b. undersize
c. intermediate material
d. oversize
d. oversize
The tylers standard screen series is characterized by
a. squarer root of two ratioof areas between successive screens
b. square root of four ratio of linear openings between successive screens
c. twice the area ratio between successive screens
d. none of these
c. twice the area ratio between successive screens
The ratio of the clear opening corresponding to a mesh size in the Tyler Standard screen series to that of the next smaller screen is
a. 2
b. sqrt 2
c. 1.5
d. none of these
b. sqrt. 2
The ratio of the area of the opening in one screen (tyler Standard) to the opening of the next smaller screen is
a. 1.5
b. 1
c. sqrt. 2
d. nonef these
d. none of these
The cumulative Screen Analysis for determining thesurface area ofparticle is more precise than the differential screen analysis because of the
a. assumption that all particles in a single fraction are equal in size
b. fact that screening is more effective
c. assumption that all particles in a single fraction are equal in size is not needed
d. none of these
c. assumption that all particles in a single fraction are equal in size is not needed
Increasing the capacityof a screen
a. decreases the screen effectiveness
b. increases the screen effectiveness
c. does not affect the screen effectiveness
d. none these
a.decrease the screen effectiveness
