Engine : Motor Plants and Auxiliary Boilers - 361/947
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| In addition to the main starting air compressor, another air compressor, driven by a separate power source, is installed to __________. |
| A) provide air for engine scavenging |
| B) provide air for engine supercharging |
| C) supply a backup source of starting air |
| D) supply the independent source of reversing air |
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