b) The bore of each cylinder in a four-cylinder four-stroke internal combustion engine is 28 mm and the stroke of each piston is 125 mm. During testing, the engine runs at 105 revolutions per minute (rpm) with a pressure-volume indicator diagram showing a mean net area of 2.4 cm2 and a diagram length of 0.9 cm. The pressure scale on the indictor diagram is set to 120 kN/m2 per cm. Calculate the mean effective pressure (m.e.p) and the indicated power developed by this four-cylinder four-stroke engine.

b) The bore of each cylinder in a four-cylinder four-stroke internal combustion engine is 28 mm and the stroke of each piston is 125 mm. During testing, the engine runs at 105 revolutions per minute (rpm) with a pressure-volume indicator diagram showing a mean net area of 2.4 cm2 and a diagram length of 0.9 cm. The pressure scale on the indictor diagram is set to 120 kN/m2 per cm. Calculate the mean effective pressure (m.e.p) and the indicated power developed by this four-cylinder four-stroke engine.

Welding: Principles and Applications (MindTap Course List)

8th Edition

ISBN:9781305494695

Author:Larry Jeffus

Publisher:Larry Jeffus

Chapter31: Oxyfuel Welding And Cutting Equipment, Setup, And Operation

Section: Chapter Questions

Problem 31R: Approximately how long would it take a 50/50 mixture of oxygen and acetylene to flash back through a...

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1a) The bore of each cylinder in a four-cylinder four-stroke internal combustion engine is 43 mm and the stroke for each piston is 130 mm. During testing, the engine runs at 85 revolutions per minute (rpm) with a pressure-volume indicator diagram showing a mean net area of 2.8 cm2 and a diagram length of 0.95 cm. The pressure scale on the indictor diagram is set to 165 kN/m2 per cm. Calculate the mean effective pressure (m.e.p) and the indicated power developed by this four-cylinder four-stroke engine. 1b) Explain why an engine cylinder experiences engine knock (or ‘knocking’) and give two effects of engine knock.
b) The bore diameter of each cylinder in a sir-cylinder four-stroke internal combustion engine is 32 mm and the stroke of each piston is 125 mm. During testing, the engine runs at 1450 revolutions per minute (pm) with a pressure-volume indicator diagram showing a mean net area of 2 90 cm' and a diagram length of 0.85 cm. The pressure scale on the indicator diagram is set to 165 kNmper cm Calculate the mean effective pressure (mep) and the indicated power in klowatts (aW) developed by this six-cylinder four-stroke engine. Give your answer to 2 decimal places. c) A hollow connecting rod has an inner diameter of 26.25 mm and is subjected to an axial tensile load of 500 MN. the maximum allowable stress for this hollow rod is 325 KNimm, calculate the minimum thickness of the rod. Give your answer in millimetres (mm) and to 2 decimal places.
QUESTION 2 A single-cylinder, 4-stroke, 3-liter gasoline engine operates at 716 rpm and a compression ratio of 9. The pressure and temperature at the intake are 98.7 kPa and 29 ºc respectively. The fuel used has a heating value of 42,500 kJ/kg, the air-fuel ratio is 14, and 84.65 % mechanical efficiency. The length of the indicator card is 55.2 mm with an area of 466.5 mm² and the spring scale is 0.85 bar/mm, considering a volumetric efficiency of 91.6% and a 17% excess air. Determine the ISFC in kg/kW-hr. Note: Use four (4) decimal places in your solution and answer.
QUESTION 3 A single-cylinder, 4-stroke, 3-liter gasoline engine operates at 646 rpm and a compression ratio of 9. The pressure and temperature at the intake are 101.0 kPa and 32 °C respectively. The fuel used has a heating value of 42,500 kJ/kg, the air-fuel ratio is 14, and 77.2 % mechanical efficiency. The length of the indicator card is 55.1 mm with an area of 503.7 mm² and the spring scale is 0.85 bar/mm, considering a volumetric efficiency of 93.6% and a 24% excess air. Determine Brake Heat Rate in kJ/kW-hr. Note: Use two (2) decimal places in your solution and answer.
QUESTION 1 A single-cylinder, 4-stroke, 3-liter gasoline engine operates at 608 rpm and a compression ratio of 9. The pressure and temperature at the intake are 103 kPa and 32 °C respectively. The fuel used has a heating value of 42,500 kJ/kg, the air-fuel ratio is 14, and 75.6 % mechanical efficiency. The length of the indicator card is 55.8 mm with an area of 481.0 mm² and the spring scale is 0.85 bar/mm, considering a volumetric efficiency of 90% and a 25% excess air. Determine the engine's developed power, kW. Note: Use four (4) decimal places in your solution and answer.
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Approximately how long would it take a 50/50 mixture of oxygen and acetylene to flash back through a 21-ft-(7.62-m) long hose?
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Fig.1 shows the diesel engine cycle. It is very similar to the Otto cycle (presented in thetextbook), but with two important differences. First, the fuel is not added until the air is fully compressed at point 2.This is because at the end of adiabatic compressionthe fuel begins to burn spontaneously (there are no spark plugs in a diesel engine).Second, combustion occurs more slowly and with the fuel being injected continuously.This characterizes the ignition stage as a constant pressure process. The cycle shown inFig.1 has an expansion Vmax - Vmın of 1000 cm^3and compression ratio r = Vmax/Vmın = 21.These are typical values for a diesel-powered truck. The engine operates with air intake(γ = 1, 4) at 25°C and 1 atm. The amount of fuel injected into the cylinder has a heat ofcombustion of 1000 J.a. Find the value of p, V, and T, for each of the vertices of the cycle. Finally, arrange yourresult in a table format.b. What is the total work done by the cylinder in one complete cycle?c. What…