Engine_2014 : General Subjects - 2134/3524
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| Differential pistons used in some reciprocating air compressors, serve to provide __________ . |
| A) a means of distributing side pressures over a wider area of each cylinder |
| B) a means of unloading during start-up |
| C) more than one stage of compression by each piston |
| D) a variable compression ratio enabling the output to be varied to suit any load condition |
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