2. A test conducted on a four-stroke four-cylinder petrol engine having a bore of 75mm and a stroke of 93mm gave the following data: = 3400 rev/min Engine speed Dynamometer = 70 Nm Indicated mean effective pressure = 6.7 bar = 8.5 Kg/hr Rate of fuel consumption Calorific value of fuel = 42 500 KJ/Kg Clearance volume = 56.8 cm³ Calculate the following for the engine: a. Shaft power, indicated power and mechanical efficiency. b. Indicated and shaft thermal efficiencies. c. Specific fuel consumption. 3. During the test on the engine in problem #2, it is found that 100 cm³ of petrol of specific gravity 0.79 is consumed in 22.6 seconds. If the atmospheric conditions in the test room are 1.013 bar and 24°C, determine a. Mass flow rate if air consumption b. Mass flow rate of fuel consumption c. Air/ Fuel ratio.

2. A test conducted on a four-stroke four-cylinder petrol engine having a bore of 75mm and a stroke of 93mm gave the following data: = 3400 rev/min Engine speed Dynamometer = 70 Nm Indicated mean effective pressure = 6.7 bar = 8.5 Kg/hr Rate of fuel consumption Calorific value of fuel = 42 500 KJ/Kg Clearance volume = 56.8 cm³ Calculate the following for the engine: a. Shaft power, indicated power and mechanical efficiency. b. Indicated and shaft thermal efficiencies. c. Specific fuel consumption. 3. During the test on the engine in problem #2, it is found that 100 cm³ of petrol of specific gravity 0.79 is consumed in 22.6 seconds. If the atmospheric conditions in the test room are 1.013 bar and 24°C, determine a. Mass flow rate if air consumption b. Mass flow rate of fuel consumption c. Air/ Fuel ratio.

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

Section: Chapter Questions

Problem 1.1MA

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