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				| 1. | A single cylinder 2-stroke engine operates at 1500 rpm. Calculate the depth where the temperature wave due to variation in cylinder is damped to 1% of its surface value. For the cylinder material, thermal diffusivity = 0.042 m2/hr | 
| A. | 0.1996 cm | 
| B. | 0.3887 cm | 
| C. | 0.2774 cm | 
| D. | 0.1775 cm | 
| Answer» E. | |