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In a glass stem thermometer the space above the liquid is usually:

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Which of the following is NOT a pilot for a gas burner?

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Apparent power is the:

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Apparent power is conventionally expressed in

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A low water fuel cutoff that serves no other purpose:

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The fuel for a diesel engine is:

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A control valve that has one plug that moves upward to close the port is called:

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Auto-transformers:

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The _____ number of oil indicates the acidity of oil.

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The pressure relief valve on a hot water boiler:

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On a gas fired automatic boiler a normal programmed start-up takes approximately:

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A material that is commonly used as a solid lubricant is:

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An air compressor auxiliary which will decrease the power requirement is the:

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Three-phase transformers have:

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To regulate the flow of water to a zone circuit a:

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