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				| 1. | For a heat engine operating on the Carnot cycle, the work output is \(\frac{1}{4}\) th of the heat transferred to the sink. The efficiency of the engine is | 
| A. | 20% | 
| B. | 33.3% | 
| C. | 40% | 
| D. | 50% | 
| Answer» B. 33.3% | |