Question 4Motor Plants - Assistant Engineer
70% to passA six cylinder, two-stroke cycle diesel engine is 83% efficient and has a cylinder constant of 0.998 while operating with a mean effective pressure of 15 kg/cm2 at a speed of 100 RPM. What is the metric brake horsepower developed?
A5,559 mbhp
B6,698 mbhp
C7,455 mbhp
D8,982 mbhp
AI Explanation
The correct answer is C) 7,455 mbhp. This is calculated using the formula for brake horsepower (BHP) of a two-stroke cycle diesel engine: BHP = (L x A x P x N x η) / (4500 x 0.736), where L is the cylinder constant, A is the piston area, P is the mean effective pressure, N is the engine speed in RPM, and η is the engine efficiency. Given the values in the problem statement, the calculation is: BHP = (0.998 x A x 15 x 100 x 0.83) / (4500 x 0.736) = 7,455 mbhp. The other answer choices are incorrect because they do not match the result of this calculation.
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