One of the wheels and leaf springs of an automobile, traveling over a rough road, is
shown in Figure 1 below. For simplicity, all the wheels can be assumed to be
identical and the system can be idealized as shown in Figure 2 below. The
automobile has a mass of m1 = 1000 kg and the leaf springs have a total stiffness of
k1 = 400kN/m. The wheels and axles have a mass of m2 =300kg and the tires have
a stiffness of k2= 500kN/m. If the road surface varies sinusoid ally with an
amplitude of Y = 0.1 and a period of l = 6m find the critical velocities of the �
answer of rod diameter,diameter pf the knuckle pin,, diameter of single eye
The design of the gear-and-shaft system depicted necessitates the use of steel shafts of the same
diameter for both AB and CD. It is also necessary that the maximum pressure be 60 MPa, and that
the angle D through which the end D of shaft CD turns not exceed 1.5°. Determine the needed shaft
diameter using G = 77.2 GPa
In a epicyclic gear train an arm carries two gears A and B having 40 and 60 teeth. If arm rotates at 200 rpm in clockwise direction about the centre of gear A which is fixed makes 300 rpm in the anticlockwise direction, what will be the speed of gear B.
6. A closed container contains 2 kg of fluid on a given datum. The container is now raised
vertically 1000m and the fluid is given a velocity of 50 m/s. The work done ON the fluid is 50 kJ
and the heat added is 30 kJ. If the initial internal energy is U 1 = 20 kJ, find U 2 .
A piston-cylinder containing steam at 700 kPaa and 250 o C undergoes a constant pressure process until the quality is 70%. Determine per kilogram.
A bakery oven is constructed of refractory material having an
average thermal conductivity of 0.8 Btu/hr-ft-F. The inside dimension
of the oven are 7’ x 6’ x 2’. If the wall of the oven is 4.5 in. thick and
the temperature of the inner and outer surfaces are 1200F and 200 F,
respectively, what is the total heat loss per day in the oven wall?
A hollow sphere with 4 in. inside diameter and 12 in. outside
diameter has an inner surface temperature of 500 F and outer
surface temperature if 300 F. If the thermal conductivity of the
sphere material is 25 Btu/hr-ft-F, what is the rate of heat flow?
A hollow sphere of pure iron contains a liquid chemical
mixture which releases 1,000,000 Btu/hr. If the inside diameter
and the outside of the sphere is 0.5 ft. and 1 ft., respectively,
determine the inner surface temperature of the sphere assuming
the outside surface temperature is 100 F.
A 6-in. nominal diameter mild steel pipe (OD=6.625 in.) has an inside
surface temperature of 500 F. The pipe is covered with a 3 in. layer
of 85 percent magnesia insulation which has a surface temperature
of 100 F. Determine the heat loss in Btu/hr-100 ft of pipe.
k for magnesia = 0.043Btu/hr-ft-F
k for steel = 28.2