Mechanical Operations
In screen analysis, the notation +5 mm/-10 mm means particles passing through

5 mm screen and retained on 10 mm screen
Both 5 mm and 10 mm screens
Neither 5 mm nor 10 mm screen
10 mm screen and retained on 5 mm screen

ANSWER DOWNLOAD EXAMIANS APP

Mechanical Operations
Actual operating speed of a ball mill may vary from 65 to 80% of the critical speed. Which of the following duties would require the ball mill to be operated at maximum percentage of critical speed?

Dry grindng of large particles in un-baffed mills
Wet grinding in low viscous suspension
Dry grinding of large particles (upto 1.25 cms)
Wet grinding in high viscous suspension

ANSWER DOWNLOAD EXAMIANS APP