41. A diesel engine indicator diagram has an area of 22 cm² and a length of 12.5 cm. If the scale of the indicator spring is 1 mm = 1 kg/cm², what is the cylinder mean effective pressure?

Mean effective pressure is calculated by dividing the diagram area by its length to determine the mean height, then multiplying by the indicator spring scale. The area, given as 22 cm², must be converted to mm² (2200 mm²) and the length, given as 12.5 cm, must be converted to mm (125 mm). The mean height is then 2200 mm² / 125 mm = 17.6 mm. Finally, multiplying by the spring scale of 1 kg/cm² per mm yields a mean effective pressure of 17.6 kg/cm².