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A(n) ___ test is the most accurate method of testing a low water fuel cutoff.

Additional components that may be encountered with cooling systems are liquid receivers, accumulators, and purge units.

A pressure control must be mounted in a vertical position to ensure accurate operation.

An ammonia-water chiller system commonly includes a generator, condenser, evaporator, and absorber.

A ___ is burner control equipment that monitors the burner start-up sequence and the main flame during normal operation.

Only watertube boilers have bottom blowdown valves.

A ___ is an auxiliary device commonly used with boilers to transfer heat from a hotter fluid to a cooler fluid.

Four common types of ___ include the thermostatic, float thermostatic, inverted bucket, and thermodynamic.

Only watertube boilers have bottom blowdown valves.

Water added to a boiler to replace water lost due to leaks or lost condensate is known as ___ water.