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6 Cards in this Set
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1.) A 12×18 in four cylinder four stroke single acting diesel engine is rated at 200 bhp at 260 rpm. Fuel consumption at rated load is 0.42 lb per bhp-hr with a heating value of 18,920 btu/lb. Compute the brake mean effective pressure. ( in psi ) |
74.33 psi |
https://drive.google.com/drive/folders/1oegYCsi3vzn_CQBaeVBbHynd4-95PAlJ?usp=sharing |
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2.) A four cylinder, 4-stroke cycle,20 cm x 25 cm ×550 rpm diesel engine has a mean effective pressure of 150 psi. Calculate the brake power (kW) if mechanical efficiency is 88% |
131.01 kW |
https://drive.google.com/drive/folders/1UEjEeeWEMZIppoVwWUu1hK5u_Hx1AGrD?usp=sharing |
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3.) A six cylinder,4 stroke diesel engine with 76 mm bore × 89 mm stroke was tested at 2,000 rpm in the test bed and it was found that the engine torque was 153.5 N-m with all cylinders firing but 123 N-m when one cylinder was out. The engine consumed 12.3 kg of fuel per hour with a heating value of 54,120 anf 252.2 kg of air at 15.6 °C per hour. Determine the indicated power? |
38.4 kW |
https://drive.google.com/drive/folders/1JahsX4_gFMT-ihgzVVjS6ox4KNuU1xnK?usp=sharing |
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4.) A certain diesel engine with the following specifications, 8 cylinder, 400mm x 600mm, four stroke cycle has a fuel consumption of 0.60 lb/hp-hr based on 19,100 Btu/lb. Engine speed is 280 rpm with an indicated mean effective pressure of 130 psi. If the jacket water carries away an estimated 25% of the heat supplied, find its capacity (gpm) requires if the allowable rise is 40°F |
241.90 gpm |
https://drive.google.com/drive/folders/1GSd7aIRxKNN9Cr4IA1T5GOPC6RxOtHQu?usp=sharing |
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5.) A four stroke, 8 cylinder diesel engine with bore and stroke of 9 inches and 12 inches respectively and speed of 950 rpm has a brake mean effective pressure of 164 psi. The specific fuel consumption is 0.39 lb/bhp-hr and the fuel heating value is 18,500 Btu/lb. Determine the thermal efficiency. |
35.27% |
https://drive.google.com/drive/folders/1GSd7aIRxKNN9Cr4IA1T5GOPC6RxOtHQu?usp=sharing |
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6.) The area of an indicator diagram taken off a four cylinder, single acting, four stroke engine running at 5.5 rev/s is 390 mm², the length 70 mm and the scale of the indicator spring is 1 mm = 80 kPa. The diamtet of the cylinders is 150 mm and the stroke is 200 mm. What is the indicated power of the engine?
A. 35.75 kW B. 27.71 kW C. 17.33 kW D. 25.76 kW |
C. 17.33 kW |
https://drive.google.com/drive/folders/147iSSLHKRLbq9cR2i0hXSliV-iaQj2Rs |
