A ___ consists of two independent spring-loaded check valves, test cocks, and isolation valves.

A low water fuel cutoff should be tested ___.

Protective footwear must comply with___, Personal Protection—Protective Footwear.

Protective footwear must comply with___, Personal Protection—Protective Footwear.

A boiler should be dumped when hot to allow the heat to be recovered.

A low water fuel cutoff should be tested ___.

Boilers used in industry are designed to ___.

A decrease in a suction gauge reading indicates either a dirty strainer or cold fuel oil.

Steam strainers should be located on a steam line ___.

Steam strainers should be located on a steam line ___.