The unit of filter medium resistance is________________?
A. cm-1
B. gm/cm-1
C. cm/gm-1
D. gm-1
Month: February 2019
A tube mill as compared to a ball mill__________________?
A tube mill as compared to a ball mill__________________?
A. Employs smaller balls
B. Gives finer size reduction but consumes more power
C. Has larger length/diameter ratio (>2 as compared to 1 for ball mill)
D. All A., B. and C.
In case of grinding in a ball mill__________________?
In case of grinding in a ball mill__________________?
A. Wet grinding achieves a finer product size than dry grinding
B. Its capacity decreases with increasing fineness of the products
C. Grinding cost and power requirement increases with increasing fineness of the products
D. All A., B. and C
The specific cake resistance for compressible sludges is a function of the pressure drop__________________?
The specific cake resistance for compressible sludges is a function of the pressure drop__________________?
A. Over cake
B. Over medium
C. Overall
D. None of these
Vacuum filter is most suitable for the_______________?
Vacuum filter is most suitable for the_______________?
A. Removal of fines from liquid
B. Liquids having high vapour pressure
C. Liquids of very high viscosity
D. None of these
Sphericity is the ratio of the surface area of a spherical particle having the same volume as the particle to the surface area of the particle. Which of the following has the maximum value of sphericity ?
Sphericity is the ratio of the surface area of a spherical particle having the same volume as the particle to the surface area of the particle. Which of the following has the maximum value of sphericity ?
A. Sphere
B. Cube
C. Cylinder (L/D = 1)
D. Raschig rings
Cumulative analysis for determining surface is more precise than differential analysis, because of the_______________?
Cumulative analysis for determining surface is more precise than differential 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
Float and sink test determines the possibility of cleaning of coal by a process based on the___________________?
Float and sink test determines the possibility of cleaning of coal by a process based on the___________________?
A. Gravity separation
B. Wettability
C. Particle shape
D. None of these
Which of the following is not a part of the Blake jaw crusher ?
Which of the following is not a part of the Blake jaw crusher ?
A. Hanger
B. Check plates
C. Toggles
D. Pitman
Wet grinding in a revolving mill ______________ as compared to dry grinding ?
Wet grinding in a revolving mill ______________ as compared to dry grinding ?
A. Gives less wear on chamber walls
B. Requires more energy
C. Increases capacity
D. Complicates handling of the product