- (A) 4
- (B) 1/4
- (C) 1
- (D) 1/2
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- (A) 0.5
- (B) 1
- (C) < 1
- (D) √3
- (A) μ > tan α
- (B) μ ≥ tan α
- (C) μ > tan 2α
- (D) μ ≤ tan α
- (A) Electric spark
- (B) Corona discharge
- (C) Alternating current
- (D) None of these
- (A) Fine (e.g. – 200 mesh size coal)
- (B) Sticky (e.g. clay paste)
- (C) Small lumpy (e.g. grains and sand)
- (D) Free flowing
- (A) cm-1
- (B) gm/cm-1
- (C) cm/gm-1
- (D) gm-1
- (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) 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) Over cake
- (B) Over medium
- (C) Overall
- (D) None of these
- (A) Removal of fines from liquid
- (B) Liquids having high vapour pressure
- (C) Liquids of very high viscosity
- (D) None of these
