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Bloodletting, a treatment devised centuries ago to restore the balance of humors, was accomplished with the use of _________.

Fans used in air distribution systems ____.

Evaporator repairs are usually limited to the following tasks, except for _____.

If a liquid line is not just warm, but noticeably hot, it probably contains _____.

Shut down and lock out all electrical service prior to opening the water circuit of a water-cooled condenser, otherwise _____.

The main method of capacity control used by a centrifugal compressor is done by ____.

Automatic fire dampers should be installed in all ____ ducts in commercial and industrial buildings.

Cylinder unloading is commonly accomplished by holding ____.

A chiller with a centrifugal compressor has an oil pump that is driven by ____.

Which of the following statements about duct systems is false?