Mechanical Engineering Answers

A 10.000-in-diameter plunger slides in a 10.006-in-diameter cylinder, the annular space being filled with oil having a kinematic viscosity of 0.004 ft2/s and specific gravity of 0.85. If the plunger moves at 0.6ft/s, find the force, in lbf, when 9 ft is engaged in the cylinder

Determine the viscosity, in Pa-s, in between plates that has a 0.5 mm gap with each other. The moving plate travels at 0.50 m/s, relative to the stationary plate, under a shear stress of 4.0 Pa

An electric train start from a station and maintained an acceleration of 0.9m/s² for 20 seconds, if it then travel for 80 seconds with uniform velocity and finally has a uniform retardation which brings it to rest in a further 10 seconds. calculate the retardation and the total distance covered.

Water vapor bc enters an insulated turbine steadily at 6 Mpa 700 defress celcius at a rate of 100 of/min and exits at 15 kpa. the isentropic turbine efficiency is 96% . the kinetic energy are negligible the surroundings ate T0= 300 K and P0= 1atm . Determine the (a) the actual power developed by turbine, in kw (b) the rate at which energy is destroyed within the turbine, in kw(c) the second law of efficiency of the turbine.

Draw a helical spring of circular wire and -in terms of load, dimensions, and material- exress:

-maximum shear stress,

-angular deflection,

-spring rate,

-energy stored,

-volume of spring wire,

-axial deflection, and

-length of spring wire.

Assme reasonable values and estimate factors

Design and draw a right-angled bell crank leaver to raise a Vertical load of 8560 N at the longer arm end. The arm length are 60 cm. The permissibe stresses in shear and tension for the lever and pin materials must be below 6000 N/Cm^2 , respectiviely. Maximum bearing stress of pins is 15 N/mm^2

water at 80c flows through a 50mm bore steel pipe of 6mm thickness and the atmospheric temperature is 15c. The thermal conductivity of the steel is 48w/m^2k, and the inside and outside heat transfer coefficients are 2800 n 17 w/m^2k. Neglecting radiation, calculate the rate of heat transfer per unit length of pipe. If a layer of insulation 12mm thick of thermal conductivity 0.03w/mk is wrapped round the outside surface, calculate the percentage reduction in heat loss for the pipe

Draw A thin hexagonal plate of side 35 mm is resting on one 

of its sides in HP such that the surface of the plate makes an 

angle of 55° to HP and the side opposite to side on which it 

rests makes and angle of 35° to VP. Draw the projections of 

the plate.

Make the parabola y=ax²+bx+c pass through (0,-2) and the tangent to the line at 3x+y+3=0 at (-1,0)

50 ml of an alkaline water sample requires 10.4 ml of 0.05 N HCl upto phenolphthalein end point and total 14.3 ml of the acid for complete neutralization. Find types and amount of alkalinities in water.