Subtopic: Fluidization of granular solids – pneumatic, bucket, screw and belt conveying
Question Statement:
In horizontal pneumatic conveying of agricultural grains, the minimum gas velocity required to prevent suspended particles from settling onto the pipe bottom is known as the:
Options:
(A) Choking velocity
(B) Saltation velocity
(C) Terminal velocity
(D) Superficial fluidization velocity
Answer Key:
B
Step-by-Step Solution & Explanation
In horizontal pneumatic pipelines, the saltation velocity is the threshold air velocity below which solid particles precipitate out of the suspension stream and begin sliding along the bottom. In vertical conveying, the corresponding settling threshold is the choking velocity.