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
Mechanical Operations
The capacity of a pneumatic conveying system depends upon the ______________________?
The capacity of a pneumatic conveying system depends upon the ______________________?
A. Bulk density of materials
B. Pressure of the conveying air
C. Diameter of the conveying line
D. All A., B. and C.
Vertical transportation of materials can be done by a/an_______________?
Vertical transportation of materials can be done by a/an_______________?
A. Apron conveyor
B. Pneumatic conveyor
C. Bucket elevator
D. Both B. & C.
_____________ Centrifuge is normally used in sugar mills?
_____________ Centrifuge is normally used in sugar mills?
A. Tubular bowl
B. Disc-bowl
C. Suspended batch basket
D. Perforated horizontal basket continuous
Tabular bowl centrifuges as compared to disk bowl centrifuges___________________?
Tabular bowl centrifuges as compared to disk bowl centrifuges___________________?
A. Operate at higher speed
B. Employ bowl of larger diameter
C. Can’t be operated under pressure/vacuum
D. Can’t be used for separation of fine suspended solids from a liquid
Range of compressibility co-efficient of the commercial compressible cake obtained in filtration operation is_____________________?
Range of compressibility co-efficient of the commercial compressible cake obtained in filtration operation is_____________________?
A. 0.01 to 0.1
B. 0.1 to 0.3
C. 0.2 to 0.8
D. 0.2 to 0.4
If radius of a batch basket centrifuge is halved & the r.p.m. is doubled, then the_________________?
If radius of a batch basket centrifuge is halved & the r.p.m. is doubled, then the_________________?
A. Linear speed of the basket is doubled
B. Linear speed of the basket is halved
C. Centrifugal force is doubled
D. Capacity of centrifuge is increased
Size reduction of _____________ is accomplished in steam heated rollers and roll crushers?
Size reduction of _____________ is accomplished in steam heated rollers and roll crushers?
A. Resins
B. Gums
C. Hard rubber
D. Waxes
What is the usual value of angle of nip for crushing of ordinary rock in smooth steel crushing rolls?
What is the usual value of angle of nip for crushing of ordinary rock in smooth steel crushing rolls?
A. 16°
B. 32°
C. 40°
D. 46°
Supporting legs of a plate and frame filter is normally made of________________?
Supporting legs of a plate and frame filter is normally made of________________?
A. Stainless steel
B. Cast iron
C. High speed steel
D. Wooden plank