Question Bank • QB_EXP_APE_CVY_003 MSQ • 2 Marks

Section 6: Agricultural Process Engineering

Material Handling: Belt, Screw & Bucket Conveyors

Subtopic: Screw conveyor volumetric capacity factors

Question Statement:

The volumetric conveying capacity of a horizontal screw (auger) conveyor is directly proportional to which of the following variables?

Options:

  • (A) Rotational speed of the screw shaft ($N$ in rpm)
  • (B) Pitch distance ($p$) between consecutive screw flights
  • (C) Trough loading percentage filling factor ($\phi$)
  • (D) Color pigment of the auger flight paint

Answer Key:

A, B, C

Step-by-Step Solution & Explanation

1. Screw capacity $Q = 60 \frac{\pi}{4} (D^2 - d^2) p N \phi$: directly linear with speed $N$ (A). 2. Pitch $p$ is advance distance per revolution (B). 3. Trough filling factor $\phi$ ($30-45\%$ for grains) directly multiplies effective volume (C). 4. Paint color is purely aesthetic and has zero effect on displacement hydraulics (D is false).
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