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The ________ protects the hot water heating system from exceeding the MAWP:

a) Expansion tank
b) Pressure relief valve
c) Aquastat
d) Flow control valve

Answer :

Final answer:

The pressure relief valve is the device specifically designed to protect a hot water heating system from exceeding the Maximum Allowable Working Pressure (MAWP) by releasing excess pressure.

Explanation:

The component that protects the hot water heating system from exceeding the Maximum Allowable Working Pressure (MAWP) is the pressure relief valve. This crucial safety device is designed to automatically release water from the system when the internal pressure reaches a predetermined threshold, thus preventing potential damage or explosion caused by excessive pressure.

The expansion tank manages the expansion and contraction of water as it heats and cools, while the aquastat controls the temperature of the water in the boiler, and the flow control valve regulates the flow rate through the system; however, only the pressure relief valve is specifically designed to prevent the system pressure from surpassing the MAWP.

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Rewritten by : Barada