Refrigeration and Air Conditioning Technology (8th Edition)

Chapter 31

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The function of a multipoise or multipositional ... more

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Draft safeguard switch is also known as vent limit... more

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For example, in furnaces, they monitor the hot ... more

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The specific gravity of natural gas ranges between... more

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A digital manometer is used to determine the gas ... more

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Look air is mixture of several gases out of which ... more

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This is a simple question regarding the furnace, ... more

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Air and gas never mix completely in the mixing ... more

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B. Decrease the pressure to the burner more

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False. Not all gas valves snap action open or ... more

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D. All of the above more

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The pilot is lit every time there is a call for ... more

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In a direct burner gas valve arrangement the ... more

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Inshot burners are usually used with induced draft... more

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The amount of delay before shutting the fan off to... more

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DIP switches are switches that are used to manage ... more

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Aerated Pilot Light:The aerated pilot is blended ... more

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A thermocouple is a passive device and produces ... more

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The thermocouple on gas combustible heating ... more

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Flame-proving system is used as safety device when... more

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With liquid filled flame-proving systems, you have... more

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In the flame rectification method, an exceptional ... more

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Hot surface ignition system removes the pilot ... more

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Flame rectification system can be classified as ... more

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MicroampsThe flow of current is very less hence ... more

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Direct-vent (two-pipe) system: The two-pipe system... more

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A non-direct vented furnace uses inside the room ... more

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A furnace that has a positive pressure venting ... more

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The temperature at which condensation process ... more

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The terms excess air are commonly used to define ... more

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It is used in furnaces to reduce the pollution and... more

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Following factors are mainly used to determine the... more

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I have explained the answer itself, so it is easy ... more

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Pre-purge is part of a automotatic control system ... more

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Say for example when firing a boiler, interpurge ... more

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Smart valves are generally more expensive hence ... more

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Pipe in the farnace called as manifold. Gas flows ... more

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Manifolds are fixtures that supply gas to various ... more

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Orifice is a device which is a measuring as well ... more

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Heat exchanger is a device that is used to ... more

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Types of fan switches are: 1. Time delay fan ... more

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Closing of gas valves.The limit switch consists of... more

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Working of two stage furnace A two-stage furnace ... more

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When it is on in, it functions just like single-... more

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Metal vents are mostly used than a masonry ... more

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These are dampers that automatically shuts off ... more

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gas is flammable so flame used to check totally ... more

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To check the efficiency of a fire tube or water ... more

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