22-24. The large and small pistons in a hydraulic lift have an area of 360 cm² and 45 cm², respectively. The mass of the car is 1200 kg. 22. What force (N) must be applied to the small piston? A. 1450 C. 1487 B. 1472 D. 1495 23. What is the diameter of the large piston in cm? C. 21.4 D. 22.5 A. 20.2 B. 20.7
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- The cranks and connecting rods of a four cylinder in-line engine running at 2000 rpm are 60mm and 240mm each respectively. The cylinders are spaced 150 mm apart. If the cylinders are numbered 1 to 4 in sequence from one end, the cranks appear at intervals of 90º in an end view in the order 1-4-2-3.The reciprocating mass for each cylinder is 15 kg. Determine (i) unbalanced primary and secondary forces, (ii) unbalanced primary and secondary couples with reference to central plane of the engineA locomotive consists of multi cylinder reciprocating engine running at a speed of 8 r.p.s having a stroke length of 29cm, which carries a mass of reciprocating part whose magnitude is 11kgs with a revolving part of 5kgs rotating at 17cm radius. If two third of the reciprocating parts and all the revolving parts are to be balanced, determine the following when the crank has rotated 500 from top dead centre to bottom dead centre. solve 4 and 5 1. Maximum primary unbalanced force of reciprocating mass in newtons 2. Balancing mass required at a radius of 41cm in kgs 3. Variation of maximum & minimum tractive force in newtons 4. Variation of maximum & minimum swaying couple for the given centre distance 76cm between the two cylinders in (N-m) 5. Magnitude…A spacecraft must be maneuvered through an angle of 6O-deg in 30 s. The spacecraft moment of inertia is 8000 kg-m^2; the thrusters are located at a radius of 2.2 m from the center of mass. What is the minimum thrust level for the thrusters? Answer : 1.90 N. Don't give me wrong answers. correct answer is 1.90....show me how
- The turning-moment diagram for one cycle of a multi-cylinder engine shows fluctuations in energy above and below the mean-torque line as follows: –62·5 J, +105·7 J, –27·3 J, +63·3 J, –59·1 J, +25·2 J, –99·3 J and +54 J. Sketch the diagram and use it to find the mass of the flywheel, radius of gyration 220 mm, needed to keep the engine speed within the range 898 to 902 rev/minA shaft carries four masses A, B, C and D with a a magnitude of 200kg, 300kg, 400 kg and 200 kg respectively and revolving at radii 80mm, 70mm, 60mm and 80mm in planes measured from A at 300mm, 400mm and 700mm. The angles between the cranks measured counter clockwise are A to B 450, B to C 700 and C o D 1200. The balancing masses are to be placed in planes X and Y. Distance between planes A and X is 100mm, between X and Y is 400mm and between Y and D is 200mm. If the balancing masses revolve at radius of 100mm find their magnitude and angular positionIn a governor of the Hartnell type the arms of the bell-crank leversare equal in length, and those carrying the operating masses arevertical when the governor is rotating at its mean speed of 775rev/min, with the masses moving in a circle of 175 mm diameter -The usual central controlling spring is replaced by two paralleltension springs direetly connecting the operating masses. Find(a) the magnitude of each operating mass if a force of 90 N isrequired at the sleeve to maintain it in the mean speed positionwhen the specd is increased from 775 to 800 rev/m in(b) the stiffness, or rate, of each spring if the ratio of sleevemovement to increase of speed is 1 mm to 10 revImin when inthe mean speed position.
- .A cast iron flywheel with mean radius of 250 mm runs at average of 100 rad/s and has a maximum fluctuation of energy ∆KE of 2500 N-m. If the coefficient of fluctuation of speed of 0.01. which of the following is the mass of the flywheel rim? choices: 400 kg 100 kg 25 kg 4 kg.A steam engine develops power at mean torque of 18,000 N-m and velocity of 9 m/s. The mean diameter of the flywheel rim is 1.3 meters. The coefficient of fluctuation of speed is 0.03 and the coefficient of fluctuation of energy is 0.21. Determine the thickness of the rim in mm if the width of the rim is twice of its thickness. Assume density of rim material as 7250 kg/m3.A locomotive consists of multi cylinder reciprocating engine running at a speed of 8 r.p.s having a stroke length of 25cm, which carries a mass of reciprocating part whose magnitude is 8kgs with a revolving part of 4kgs rotating at 17cm radius. If two third of the reciprocating parts and all the revolving parts are to be balanced, determine the following when the crank has rotated 560 from top dead centre to bottom dead centre. 1. Maximum primary unbalanced force of reciprocating mass in newtons 2. Balancing mass required at a radius of 35cm in kgs 3. Variation of maximum & minimum tractive force in newtons 4. Variation of maximum & minimum swaying couple for the given centre distance 72cm between the two cylinders in (N-m) 5.…