The total force on a safety valve 3.5″ in diameter with a steam pressure of 14 psi is ___ lb.

A flow control valve functions similarly to a(n) ___ valve to prevent natural water circulation.

The Occupational Safety and Health Administration (OSHA) is an organization that promotes greater safety to life and property through uniformity in the construction, installation, repair, maintenance, and inspection of boilers and pressure vessels.

A steam trap is often included in a heat exchanger as a way to ensure that the condensate is clean and can be reused.

A ___ -pipe system completely separates heating and cooling supply and return lines.

The total force on a safety valve 3.5″ in diameter with a steam pressure of 14 psi is ___ lb.

A heat exchanger is used to transfer heat from a ___.

A steam trap is often included in a heat exchanger as a way to ensure that the condensate is clean and can be reused.

A ___ -pipe system completely separates heating and cooling supply and return lines.

___ systems are difficult to balance because the water that flows through the last heating unit must be pumped back through the whole piping system to the boiler.