Mechanical Engineering Answers

At what point on the line y = b does the line segment from (0,0) to ( a,0) subtend the

greatest angle.

n the right triangle ABC, AB = 2, BC = 4 and ED is a line parallel to AB. Find the

angle α = angle BAD which minimizes the distance L, where L = AD + ED

Calculate the maximum value of the e.m.f. generated in a coil which is rotating at 50 rev/s in a uniform magnetic field of 0.8 Wb/m2. The coil is wound on a square former having sides 5 cm in length and is wound with 300 turns

At what stage the sheet metal is called as pattern?

Mention the diagonal angle in scoop making layout?

A single disc clutch with both sides of the disc effective is used to transmit 10 kW power at 900 r.p.m. The axial pressure is limited to 0.085N / m * m ^ 2 If the external diameter of the friction lining is 1.25 times the internal diameter, find the required dimensions of the friction lining and the axial force exerted by the springs. Assume uniform wear conditions. The coefficient of friction may be taken as 0.3.

A 210-ton train has its speed reduced from 40 to 30 miles per hour in 0.50 minute. If the whole of the work done against frictional resistance of the brakes converted into heat, find the heat developed in BTU.

At what stage the sheet metal is called as pattern???

The diagonal angle in scoop making layout

??

A prop shaft of a heavy-duty truck has two bearings which are positioned at 3 metres from each other. The shaft must rotate at 30 rad/s when the truck travels at the speed of 40 m/s. Such a shaft carries two masses of (MA = 10 kg) and (MB = 5 kg) acting at the extremities of the arms 0.45 m and 0.6 m long, respectively. The planes in which these masses rotate are 1.2 m and 2.4 m,

respectively, from the left end bearing supporting the shaft. The angle between the arms is 60°. If the masses are balanced by two counter-masses (named X and Y) rotating with the shaft acting at a radius of 0.3 m and placed at 0.3 m from each bearing centre:

• Draw a diagram illustrating the position of masses on the shaft.
• Calculate the dynamic force in Newtons. Tabulate the results.
• Calculate the moment acting on the shaft in Newton-metre. Tabulate the results.
• Determine the magnitude of the Y balance mass using a vector diagram.
• Determine the magnitude of the X balance mass using a vector diagram.