NV C-1A Boilers Practice Questions - Nevada C-1A Boilers Contractor Examination Exam

Adding inhibited propylene glycol to a hydronic loop typically has which hydraulic effect?

It increases specific heat and reduces required pump head. It converts the loop into a steam system at 15 psi. It eliminates the need for a pressure-relief valve. It lowers specific heat and increases viscosity, so more flow and more head are needed for the same Btu/h.

Correct Answer:

It lowers specific heat and increases viscosity, so more flow and more head are needed for the same Btu/h.

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