Question

Vertical screw mixers are used for mixing of:

• A. \(\text{High viscous liquids}\)
• B. \(\text{Low viscous liquids}\)
• C. \(\text{Moderate viscous fluids}\)
• D. \(\text{Dry solids}\)

Hint:

Vertical screw mixers are commonly used in food, cement, and pharmaceutical industries for powder mixing.

Answer 1

The Correct Option is D

Step 1: Understanding vertical screw mixers. 
- Vertical screw mixers are designed for powdery and granular dry solids, ensuring homogeneous mixing. 
Step 2: Explanation of incorrect options. 
- (A) High viscous liquids: Require agitated tank mixers.
- (B) Low viscous liquids: Best mixed using paddle or propeller mixers. 
- (C) Moderate viscous fluids: Better handled by turbine mixers. 
Step 3: Selecting the correct option. Since vertical screw mixers are best for dry solids, the correct answer is (D) Dry solids.