Electrical Engineering Questions
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Device used in (HOT WATER) steam systems to automatically release pressure built up due to steam within the boiler. It is rated in BTUs relieved per hour and is set to open at a given pressure.
Device used to add air into a steam system when a boiler is shut down to negate the external (atmospheric) pressure.
The component of the refrigeration cycle which flashes the liquid into a vapor/liquid mixture by releasing pressure on it which also cools the mixture.
A mechanical component in a steam heating system that recovers heat that would otherwise be lost throughout the system to pre-heat the boiler feed water.
Device used for monitoring conditions (typically pressure and temperature) within the system.
Match the following types of heat transfer with the proper description:Through waves (e.g sunlight)
A two-pipe hydronic system which has a supply and return line, and the return line provides the shortest path back to the boiler for the liquid (first unit supplied is the first unit returned, and vice versa).
Match the following types of heat transfer with the proper description:Through air movement (flow)
A hydronic system which has a single, continuous pipe that feeds each of the terminal devices on the system, and continues on as the return pipe back to the boiler.
One of the most common issues with an inverted bucket steam trap is for it to lose it's condensate "prime." What is the best way to re-establish that prime so that the trap can re-accumulate condensate?
There is no difference between PSI and PSIG.
A duct accessory which acts as a valve (or plate) for regulating the flow of air out of the duct.
A type of fire suppression system which activates the medium prior to the opening of sprinkler heads so it will fill the pipes and be prepared to suppress a fire as soon as the sprinkler head releases.
A boiler that has water flow through a series of tubes that are heated by hot combustion gases which surrounds them within the tank.
Match the following types of heat transfer with the proper description:Through direct contact
A type of forced air unit which does not require ductwork, heats only single areas, and is common in areas that aren't utilized full-time or is inefficient to run a ducted mechanical system to on a regular use basis.
Which of the following is NOT one of the 5 basic "requirements" of comfort?
A forced -air system used for both heating and cooling, which moves heat from the surrounding air either into, or out of, a building depending on the need. It does not generate additional heat (no combustion) but requires a moderate climate to be efficient.
Which type of ductwork is most commonly used due to its durability and its limited concern of mold and bacteria growth?
A fire suppression sprinkler system where the heads are always open but the pipe is not pressurized. When a valve is released due to the detection of a fire, all of the heads release water until the valve is closed.