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A machine used for making (cutting) gears is called a gear hobbing machine. The gear train below shows the essential features of the work spindle drive for a gear hobbing machine.
How many times more ignition energy is required to achieve ignition of a fuel-air mixture at sea level with T = 298 K than at altitude of 6000 m where pressure P = 47,166 Pa and T = 248 K?
In a Carnot cycle, heat is supplied at 350°C and rejected at 27°C. The working fluid is water, which, while receiving heat, evaporates from liquid at 350°C to steam at 350°C.
Beam ABC of length 1.0 m and solid circular cross-section of diameter 30mm, that is pinned at C and simply supported at A.
A mass of 200 g of saturated liquid water is completely vaporized at a constant pressure of 100 kPa. Determine (a) the volume change and (b) the amount of energy added to the water.
Just a few degrees above the BCC to FCC transition temperature an iron membrane allows a flux of 10 carbon atoms/cm2-s to diffuse through.
Determine the force in member BC. After the truss is sectioned use a single equation of equilibrium for the calculation of each force. State if these member is in tension or compression. Take F1 = 2 k
Calculate the transverse modulus of the peek/carbon fiber composite with 30% volume fraction by tow method. the modulus of peek is 3.8 GPa and the modulus of the carbon fiber is 400GPa. assume the rei
An ideal diesel engine has a compression ratio of 20 and uses air as the working fluid. The state of air at the beginning of the compression process is 95 kPa and 20°C.
A SSS vapour compression refrigeration system based on refrigerant R 134a operates between an evaporator temperature of -25oC and a condenser temperature of 50oC.
A hypodermic syringe is filled with a solution whose viscosity is 3.5 x 10^3 Pa.s. the plunger cross-sectional area is 12.0 x 10^-5 m^2, and the length of the needle is 0.03m.
A proposed closed system heat engine mimics the Carnot engine except that the heat rejection compressive process is not isothermal. The process has a 100 K change in temperature.
A pulp and paper machine has a roller that has a mass of 350 kg and a mass moment of inertia about its centre of rotation of 40 kgm 2. How long will it take a torque of 20 Nm to accelerate the machine
How to derive the constitutive expression for stress in a Newtonian fluid. How to derive Navier-stokes equation for compressible, incompressible, and invicid flows?
A steel has a yield strength of 414 MPa, an ultimate tensile strength of 689 MPa, and an elongation at fracture of 15%. What is its approximate modulus of toughness?
For the given loading of teh beam AB , determine the range of values of the mass of the crate for which the system will be in equilibrium knowing that the maximum allowable value of the reactions at e
Superheated steam at 120 bar and 520oC (h = 3401.8 kJ/kg and s = 6.5555 kJ/kg.K) leaves the steam generator of a vapor power plant and enters a turbine where it expands isentropically .
Shaft a hasin figure has a power input of 75 kw at a speed of 1000 rpm in the counter clock wise direction.The gear have module of 5 mm and 20 degree pressure angle .Gear 3 is an idler.
The catapult is used to launch a ball such that it strikes the wall of the building at the maximum height of its trajectory. If it takes 1.5 s to travel from A to B, determine the velocity vA at which
Calculate the number of vacancies per cubic meter in gold at 900°C. The energy for vacancy formation is 0.98 eV/atom. Furthermore, the density and atomic weight for Au are 18.63 g/cm3 (at 900°
A 200 kg crate is to be supported by the rope and pulley arrangement shown. Determine the magnitude and direction fo the force P that must be exerted on the freee end of the rope to maintain equillibr
In heat-treating a complex -shaped part made from a 5140 steel, a final quench in stirred oil leads to a hardness of Rockwell C30 at 3mm beneath the surface.
Determine diameter of a circular rod of ductile material with a fatigue strength ,e=280 Mpa. Add a tensile yield strength of 350 Mpa. The member is subjected to a varying axial load from 700 kN to -30
What is the couple moment of the two couples that act on the pipe assembly. The distance from A to B is d = 400 mm.exptess the result as a cartesian vector.
AB is hollow having outside and inside diameters of 10 cm and 6.25 cm, respectively, and BC and CD are solid, BC having a diameter of 10 cm and CD a diameter of 8.75 cm.