Derive an equation for an Aeroplane taking turn with usual notations.
[7 marks]Explain the gyroscopic effect with suitable example.
[3 marks]Explain Sensitivity and Isochronism with respect to governors.
[4 marks]The ship is propelled by a turbine rotor having mass of 6000 kg and speed of 2400 rpm. The direction of rotation of the rotor is clockwise when viewed from the stern. The radius of gyration of the rotor is 450 mm. Determine the gyroscopic effect when 1.The ship steers the left in curve of 60 m radius at a speed of 33.48 km/hr. 2.The ship pitches 7.5 degree above and 7.5 degree below the normal position and the bow is descending with its maximum velocity. The pitching motion is simple harmonic with periodic time of 18 seconds. 3.The ship rolls and at the instant, its angular velocity is 0.035 rad/sec counter clockwise when viewed from the stern.
[7 marks]State the function of governor. Distinguish between flywheel and governor.
[3 marks]Explain any one type of dynamometer with neat sketch.
[4 marks]Derive an equation for stability of four wheeler taking turn.
[7 marks]What are the materials for friction clutches? State the characteristics of good friction material.
[4 marks]Explain various applications of flywheel
[3 marks]Derive an expression for the frictional torque acting on a centrifugal clutch.
[4 marks]Adifferential band brake has a drum with a diameter of 400 mm. The two ends of the band are fixed to the pins on the opposite sides of the fulcrum of the lever at distances of 20 mm and 100 mm from the fulcrum. The angle of contact is 270 and the coefficient of friction is 0.2. Determine the brake torque when a force of 600 Nis applied to the lever at a distance of 400 mm from fulcrum
[7 marks]Enlist the factors affecting capacity of brakes.
[3 marks]Derive the expression of maximum fluctuation of energy for multi- cylinder engine and coefficient of fluctuation of energy.
[7 marks]Differentiate between brakes and dynamometer.
[4 marks]State and explain parallel axis theorem.
[3 marks]Explain the concept of Free body diagram with suitable example.
[4 marks]Amachine is coupled to a two-stroke engine which produces a torque of (800 + 180 Sin 3θ) N-m, where θ is the crank angle. The mean engine speed is 400 rpm. The flywheel and the other rotating parts attached to the engine have a mass of 350 kg at a radius of gyration of 220 mm. Calculate; 1. Power of the engine, and 2. Total fluctuation of the speed of the flywheel in percentage when
[7 marks]the resisting torque is constant, and (ii) the resisting torque is (800 + 80 Sin θ) N-m.
[ marks]What is a clutch? Explain with neat sketch, the working of single-plate clutch.
[3 marks]For the static equilibrium of the quick-return mechanism shown in Fig.1, determine the input torque T2 to be applied on the link AB for a force of 300 Non slider D. The dimensions of the various links are; OA = 400 mm, AB = 200 mm, OC = 800 mm and CD = 300 mm. Fig. 1
Net force on piston (ii) Net load on gudgeon pin (iii) Thrust on the cylinder walls (iv) Speed at which the gudgeon pin load is reversed in direction.
[ marks]Define and explain the superposition theorem as applicable to a system of forces acting on a mechanism.
[3 marks]State and explain D’Alembert’s principle.
[4 marks]Describe the working of band and block brake with the help of neat sketch and derive the equation for ratio of tight and slack side tensions.
[7 marks]Explain the principle of virtual work.
[3 marks]The crank and connecting rod of a vertical petrol engine, running at 1800 rpm are 60 mm and 270 mm respectively. The diameter of piston is 100 mm and the mass of the reciprocating parts is 1.2 kg. During expansion stroke when the crank has turned 20 from T.D.C., the gas pressure is 650 kN/m2. Determine the find;
[7 marks]State and explain Lami’s theorem with suitable example.
