Question 4Motor Plants - Assistant Engineer70% to pass
A 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?
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.
Related Questions
#2 What is the average piston speed of a five cylinder low-speed engine with a bore of 29.5 inches (75 cm), a stroke of 63 inches (160 cm), and a rated speed of 123 RPM?#3 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? #5 An eight cylinder, four-stroke cycle, single acting diesel engine has a 650 mm bore and a 1400 mm stroke. What will be the developed indicated metric horsepower if the average mean effective pressure is 30 kg/cm2 at a speed of 100 RPM? #6 The speed of the camshaft in a two-stroke cycle diesel engine, running at 950 RPM, is_______________.#7 A diesel engine cylinder has a swept volume of 125 cubic inches and a compression ratio of 13.5 to 1. What is the clearance volume in the cylinder at top dead center?