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When burning No. 6 fuel oil, the fuel oil strainers should be cleaned at least once every ___ hr.

The liquid line is a refrigerant line that carries the warm, high-pressure liquid refrigerant between a condenser and a metering device.

A blowdown valve should be kept open long enough for the water level in the gauge glass to drop out of sight.

A blowdown valve should be kept open long enough for the water level in the gauge glass to drop out of sight.

As the pressure increases in a boiler, the boiling and condensing point of the water decrease.

If plant conditions do not warrant a(n) ___, then a package feedwater system is commonly used.

A ___ is a hot water boiler accessory resembling a piping tee that meters water flow from the supply line to the heating unit.

A(n) ___ is not intended for hot water service.

If plant conditions do not warrant a(n) ___, then a package feedwater system is commonly used.

A bottom blowdown line is piping located at the highest part of the steam side of a boiler.