Q1: increasing the capacity of a screen __________ the screen effectiveness.

ANS:A - decreases.

Increasing the capacity of a screen typically does not affect the screen effectiveness.

Explanation:

• Screen Capacity vs. Effectiveness:
  • Capacity: Refers to the amount of material that a screen can handle per unit time. Increasing capacity usually involves modifications to increase throughput.
  • Effectiveness: Refers to how well the screen separates desired particles from the feed material based on size.
• Impact of Increased Capacity:
  • Screen Effectiveness: This is primarily influenced by factors such as the design of the screen (including aperture size, shape, and material), the amplitude and frequency of vibration (for vibrating screens), and the angle of inclination.
  • Increasing Capacity: Often involves adjusting operational parameters or screen design to handle more material without compromising efficiency.
• Considerations:
  • Increasing capacity may require trade-offs, such as adjusting screen settings or using larger screens, which could affect specific separation efficiencies.
  • However, in general terms, increasing capacity does not necessarily degrade the effectiveness of the screen if adjustments are made correctly to maintain optimal separation performance.