EXERCISE 51 A 

 HOW DOES A PUMP OPERATE? 



Materials. An ordinary pump (cistern or pitcher pump). 



Directions. Operate the pump slowly, observing all the facts about the flow of the water. If 

 possible, take the pump to pieces sufficiently to find the plunger, its valve, and the valve at the 

 bottom of the cylinder. Move the plunger up and down in a bucket of water and watch the action 

 of the valve. 



When thoroughly familiar with the pump, make a diagram showing all the important parts and 

 write a description of the pump and of the way it works. 



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