Read the following text and fill in the missed words

Hydraulic machinery

The two types of _____1_____ machinery which are of interest to the _____2_____ are pumps and turbines. A _____3_____ converts mechanical energy into hydraulic energy while a _____4_____ serves the opposite _____5_____. There are many types of pumps and turbines. Each type has its own _____6_____.

There are _____7_____ of turbines. They are the _____8_____ and the _____9_____. In the impulse turbine a free jet of water impinges on the revolving element of the machine which is exposed to _____10_____ pressure. In a reaction turbine flow takes place under pressure in a _____11_____ chamber.

There are many different types of pumps, but the two types which the hydraulic engineer will encounter most frequently are _____12_____ and _____13_____ pumps.

a) purpose f) atmospheric j) roto-dynamic

b) characteristics g) reaction turbine k) displacement

c) two types h) impulse turbine l) closed

d) pump i) turbine m) hydraulic

e) water-resources engineer