III. Writing exercises:

Exercise 1. Complete the sentences with the suggested words:

modern, commonly, after, extensively, compressed, out, inexpensive

Another ________ application of positive displacement pumps are ________ air-powered double-diaphragm pumps ________ called Sand Piper or Wilden Pumps ________ their major manufacturers. They are relatively ________, and are used ________ for pumping water out of bunds, or pumping low volumes of reactants ________ of storage drums.

Exercise 2. Fill in the table with words and expressions from the text:

	parts	systems	processes
Example: pump moves			liquids or gases from low pressure to higher pressure and overcomes this difference in pressure by adding energy to the system
pumps work
pump is
pump can be powered by

Exercise 3. Compose a story on one of the topics (up to 100 words):

“Rotodynamic Pumps”

“Reciprocating-type Pumps”

“Centrifugal Pumps”