Completely solve and box the final answer. Please show the units to show the unit cancellations. Write legibly 8. Calculate the brake thermal efficiency of a supercharged 4-cylinder, four stroke cycle Diesel engine with a bore and stroke of 3.94” x 5.91”. The compression ratio is 14. Using a brake torque analysis, the dynamometer reads a scale of 143.3 pounds with 13.8” arm at 440 rpm. For a period of 14 minutes of test, 1.433 pounds of fuel with 40,702 KJ/kg heating value are completely burned with air with fuel-air ratio of 0.07.

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Clutches, Brakes, Couplings, and Flywheels

The clutch is described as a machine element used to connect or disconnect two shafts together to transmit torque or power. The clutch works on the principles of friction. The clutch is commonly used in automobiles to transfer power from the driving shaft to the driven shaft.