Exam 47: High-Pressure, Low-Pressure, and Absorption Chilled-Water Systems

The device that automatically helps to remove non-condensables from a chiller is called a(n) ____________________.

Thermostatic expansion valves are the only metering devices used in high pressure chillers.

Low pressure chillers use either air- or water-cooled condensers.

High pressure chillers use either air- or water-cooled condensers.

What is the reason to use cylinder unloading in high pressure chillers?

A benefit of operating a compressor unloaded is ____.

In a lithium bromide system, the refrigerant boils at 40°F. What is the corresponding absolute pressure required?

When referring to evaporators, the terms "direct expansion" and "dry type" can be used interchangeably.

Explain the difference, with respect to superheat, between a dry type evaporator and a flooded evaporator.

The pressure difference in an absorption chiller where the source of energy is steam or hot water is produced with the use of a(n) ____________________ solution.

Direct expansion evaporators have ____.

A reciprocating compressor with six cylinders, three banks of two cylinders each, can have its capacity reduced by unloading to ____% of full capacity.

A chiller typically cools ____________________ (what liquid?) for the purpose of air conditioning.

Explain how absorption refrigeration is different compression refrigeration.

The pressure difference in a low-pressure chiller is produced by a(n) ____________________ compressor.