The turning moment diagram for a multicylinder engine has been drawn to a scale Imm = 600 N-m vertically and Imm = 3° horizontally. The intercepted areas between the output torque curve and the mean resistance line, taken in order from one end, are as follows: +52, -124, +92, -140, +85, -72 and +107 mm2, when the engine is running at a speed of 600 r.p.m. If the total fluctuation of speed is not to exceed ±7.5% of the mean, find the necessary mass of the flywheel of radius 0.5 m. Find the mass of the flywheel • Ans.: 183 kg

The turning moment diagram for a multicylinder engine has been drawn to a scale Imm = 600 N-m vertically and Imm = 3° horizontally. The intercepted areas between the output torque curve and the mean resistance line, taken in order from one end, are as follows: +52, -124, +92, -140, +85, -72 and +107 mm2, when the engine is running at a speed of 600 r.p.m. If the total fluctuation of speed is not to exceed ±7.5% of the mean, find the necessary mass of the flywheel of radius 0.5 m. Find the mass of the flywheel • Ans.: 183 kg

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

See similar textbooks

Similar questions

A four-stroke SI engine 0.08 m bore (d), 0.10 m stroke (L), is tested at full throttle at constant speed. The fuel supply (m; ) is fixed at 0.0011333 kg/s and the spark plugs of the four cylinders are successively short circuited without change of speed, brake torque (4) being correspondingly adjusted. The brake power (bp) measurements are the following: With all cylinders firing With cylinder No. 1 cut off With cylinder No. 2 cut off With cylinder No. 3 cut off With cylinder No. 2 cut off = 9.1 kW 12.5 kW 9 kW 9.15 kW 9.2 kW The lower calorific (or heating value, LCV) of the fuel is 44100 kJ/kg. The clearance volume (Va) of one cylinder 70.0x10³ mm³. Determine: (a) Indicated power (ip) of the engine under these conditions. (b) The indicated thermal efficiency (Nind, th). (c) The relative efficiency (7el) of this engine.
Fig Q1 shows a two-stage spur gearbox. The input shaft is coupled to a motor. The shaft "b" turns freely in bearings C and D, except for the gear-tooth forces. Assuming 100% gear efficiency, determine the resultant radial loads applied to bearings C and D, and sketch the shaft "b" as a free body in equilibrium.
A 254 mm x 357 mm twin cyclinder, 4 stroke engine operates with an indicated heat efficiency pressure of 355 kpa at 200 rpm. if the actual developed torque is 854 n-m. what is the friction power?
an airplane turbofan compressor blade is 3.0 m long and is rotating at 12350 rmp. Calculate the following- angular speed, w_____________rad/s linear spped at the tip of the blade, v=_________m/s angular and linear displacement after 3.3s, 0= ___________rad s______________m
A six-cylinder two-stroke automotive engine has been designed to provide a maximum brake torque of (3.30x10^2) Nm at rated engine speed of (5.000x10^3) rpm. The engine specifications are listed below: Bore and stroke (mm): (8.4000x10^1) x (9.2000x10^1) Compression ratio: 11.0: 1 Find its brake mean effective pressure (bmep). The answer should be in kPa with three significant figures. Note: Your answer is assumed to be reduced to the highest power possible. Your Answer: x10 Answer
Turbomachinery
During a test on a five-cylinder four-stroke IC diesel engine with a cylinder bore and stroke length of 260 mm and 305 mm respectively, running at 503 r/min, the following results were obtained: Mass on Dynamometer mass hanger (arm length = 0.825 m) 221.9 kg Indicated mean effective pressure 400 kPa Fuel consumption (with Qnet,v = 39.8 MJ/kg, density = 0.944 kg/l) 6 ml/s Take acceleration due to gravity as 9.81 m per square seconds Calculate the brake power .
A four cylinder diesel engine works on lower stroke has cylinder bore of 90 mm and the stroke of 150mm. The crank speed of 370 rpm fuel consumed by the engine 15 kg/hr and its calorific value 39000 kJ/kg the indicated mean effective pressure is 5 bar of compression ratio of an engine is 14 and cut off ratio is 2.3. Calculate relative efficiency of an engine if y=1.4
During a test on a 3-cylinder four-stroke IC diesel engine with a cylinder bore and stroke length of 276 mm and 306 mm respectively, running at 547 r/min, the following results were obtained: Mass on Dynamometer mass hanger (arm length = 0.815 m) 200.6 kg Indicated mean effective pressure 428 kPa Fuel consumption (with Qnet.v = 39.8 MJ/kg, density = 0.944 kg/l) 6 ml/s Take acceleration due to gravity as 9.81 m per square seconds Calculate the mechanical efficiency in decimal fraction to 3 decimal places, No unit needed for answer
Calculate the blade length of a wind turbine rotor which produces a maximum power of 1.1 kW at a wind speed of 5.16 Km/Hr. Use air density as 1.23 Kg/m³, generator efficiency as 61%, gearbox efficiency as 0.59 and power coefficient of blades as 0.38.
CTION A estion 1 A double acting cylinder is used to raise and lower a 150 kg mass attached at the end of a steel cable as shown in Fig. 1(a). Answer each of the following: (0) If the cylinder is supplied with compressed air at 6 Bar, calculate the standard cylinder diameter required. (i) What is the optimal method of speed control for lowering this mass? Explain your answer, m=150 kg Fig. 1(a)
A four-stroke automotive engine has been designed to provide a maximum brake torque of (2.00x10^2) Nm at rated engine speed of (4.8000x10^3) rpm. The engine specifications are listed below: Bore and stroke (mm): (7.900x10^1) x (8.300x10^1) Compression ratio: 12.0 : 1 Estimate the maximum brake power the engine will deliver. The answer should be in kW with three significant figures. Note: Your answer is assumed to be reduced to the highest power possible. Your Answer: x10