February 2025

Pumps: Lift pump

By |2025-02-12T09:03:23+02:00February 12th, 2025|Notes, O Level Science Notes, Ordinary Level Notes|

ZIMSEC O Level Combined Science Notes: Pumps: Lift pump

  • It has a cylinder
  • A piston
  • Two valves and
  • a spout
  • They make use of atmospheric pressure which forces fluid (water) into the pump through valves
  • Valves allow fluid to only flow in one direction
  • At any given point there is one valve open and another closed

 

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Pumps: Force pump

By |2025-02-12T09:04:42+02:00February 12th, 2025|Notes, O Level Science Notes, Ordinary Level Notes|

A solar force pump. Image credit sunfuel.co.in A solar force pump. Image credit sunfuel.co.in ZIMSEC O Level Combined Science Notes: Pumps: Force pump

  • A force pump:
  • Has a cylinder, piston, two valves and a spout (outlet)
  • It makes use of atmospheric pressure to force fluid/water into the pump through valves
  • The […]
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Pumps: Blair pump

By |2025-02-12T09:05:51+02:00February 12th, 2025|Notes, O Level Science Notes, Ordinary Level Notes|

The blair pump The blair pump ZIMSEC O Level Combined Science Notes: Pumps: Blair pump

  • The pumped was first developed in 1976
  • The design was further refined at the Blair Research Laboratory in Harare
  • Various models have been subsequently designed and made
  • Cumulating in the famous Type B bush pump
  • It is popularly known […]
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