Dynamics of Machine (ME-503 (B)) - Important Questions

The turning moment diagram for a petrol engine is drawn to scales 1 mm = 500 Nm and 1 mm = 3 degree. The areas above and below the mean torque line are measured. Determine the coefficient of fluctuation of speed if the mass and radius of gyration of the flywheel are given.

Define coefficient of fluctuation of energy, coefficient of fluctuation of speed, fluctuation of energy and fluctuation of speed for flywheels.

Derive an expression for the height of a Watt governor and prove that the height of the governor is inversely proportional to the square of the speed.

The upper and lower arms of a Porter governor are 200 mm and 250 mm respectively, both pivoted on the axis of rotation. The weight of each ball is given and central load is 150 N with friction. Determine the range of speed for limiting upper-arm angles of 30 degree and 40 degree from vertical.

Define and explain sensitiveness, stability, isochronism and hunting in connection with governors.

A rotating shaft carries masses in different planes spaced apart along the shaft. Find the unknown balancing mass and the relative angular settings for complete balance.

Explain balancing of single cylinder and in-line multi-cylinder engines. Derive expressions for primary and secondary unbalanced forces.

Explain the graphical and analytical methods for determination of balancing masses in different planes.

Define clutch and its types. Explain with neat sketch the construction and working of a cone clutch.

What is meant by the expression friction circle? Deduce an expression for the radius of friction circle in terms of radius of the journal and angle of friction.

A single plate clutch with both sides effective has outer and inner diameters 300 mm and 200 mm. The maximum pressure intensity is limited with coefficient of friction 0.25. Determine the power transmitted at given speed assuming uniform wear.

Derive expressions for frictional torque in flat pivot and collar bearings by uniform pressure and uniform wear criteria.

What is a dynamometer? What are its types? Differentiate between absorption and transmission dynamometers including torsion dynamometer.

Describe the working of band and block brake with the help of neat sketch.

Explain the turning moment diagram for a four-stroke cycle IC engine and discuss its uses.

Write short notes on different types of dynamometers and their applications for power measurement.