Engine : Motor Plants and Auxiliary Boilers - 135/947
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| The purpose of try-cocks used on an auxiliary boiler is to __________. |
| A) provide an alternate means of determining the water level, if the gage glass fails |
| B) provide a means of adding chemical feed to the boiler water |
| C) provide a means for blowing down the gage glass |
| D) act as a steam sentinel valve, if any of the fusible plugs should melt |
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