Under normal conditions, both pumps in a duplex system operate simultaneously.

• true
• false

Float stops are permanently affixed to a float road by the manufacturer.

• true
• false

A sewer ejector must be installed in an enclosed pit with a gas-tight cover.

• true
• false

The air in a medical gas system is used solely for direct patient therapy.

• true
• false

The water in a liquid ring compressor is used for compression, cleaning and cooling.

• true
• false

In both sump pumps and sewage ejectors, the type of pump generally used is the _______________

To prevent backflow into a sump pit, you should install a/an _______________

Boiler feed pumps are controlled by _______________

In a piston type reciprocating compressor, the downward stroke produces a/an _______________ piston compressor.

The compressor used in medical air systems that insures 100% oil-free air is the _______________ piston compressor.