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Manufacturing Engineering

Finding the volume of hydrogen

A hydrogen filled balloon of the type used in cosmic ray studies is to be expanded to its full size which is a 100-ft diameter sphere, without stress in the wall at an altitude of 150,000 ft. If the pressure and temperature at this altitude are 0.14 psia and -67 degrees F respectively, Find the volume of hydrogen at 14.7 psia

Thick Cylinders

1. A steel cylinder with an internal radius of 50mm is designed to carry a maximum stress of 400 MPs. It is subjected to an internal pressure of 80 MPs. (i) Determine the required wall thickness. (ii) The outer radius of this cylinder is chosen as 70 mm and the internal pressure is increased to 160 MPa. The cylinder is str

Shearing Stress

Two bars, one having a circular section of radius b, the other an elliptic section with semiaxes a,b. For equal angles of twist, which bar experiences the larger shearing stress? For equal allowable shearing stresses, which one resists a larger twisting moment?

Coefficient Reaction

The removal efficiency of a reactor tank is 73-percent and its residence time is 28.5s. For steady flow and first-order kinetics what will be the reaction for the coefficient(k) for the tank.

Best way to set up the formula of the arrangement.

A hemispherical dome is filled with water. The dome arrangement weighs 28kN and is fastened to the floor by bolts equally spaced around the circumstances at the base. Find the total force required to hold the down the dome.

Arranging Groups into Parameters

By inspection, arrange the following groups into dimensionless parameters. (a)a,l, and t; (b)v,l,and t; (c)A,Q,and w; (d)K,*,and A.

Dimensional parameters

In flows past solid bodies, the force exerted on the body by the fluid motion depends upon the fluid velocity u, the density p, the viscosity, and the principal dimension of the body L. What are the dimensional parameter for the given conditions?

Optimization Similitude Prototypes

The resistance to the ascent of a balloon is to be determined by studying the ascent of a 1:50 scale model in water. How would such a model study be conducted and the results converted to prototype behavior?

How to change to SI units.

The density of a substance is 2.94g/cm. In SI units, what is its (a) specific gravity (b) specific volume, and (c) specific weight?

Learning the proper procedures for arranging the problem

A trapezoidal channel made out of brick, with bottom width 6ft and with bottom slope 0.001, is to carry 600cfs. What should be the side slopes and depth of channel for the least number of bricks? Arrange the problem to solve it.

Determining initial acceleration of a projectile

How can I proceed to solve the problem below? The problem: A projectile enters a resisting medium at x = 0 with an initial velocity Vo = 900 ft/s and travels 4in. before coming to rest. Assuming that the velocity of the projectile was defined by the relation V = Vo - kx, where V is expressed in ft/s and x in feet, determine

Range of Q values for which equilibrium is maintained

How can I solve the problem below. The mechanism shown is acted upon by the force P of magnitude P=20 lb. Knowing that teta=25 degree and that the coefficient of static friction between collar C and the horizontal rod is 0.30, determine the range of values of Q for which equilibrium is maintained. I included the mechanism

Working with boiler suspension bolts.

An HRT boiler is 4766mm long and 3533mm in diameter. It has 66 steel tubes with a diameter of 9mm. The total dry weight of the boiler is 2.565 tonnes. 4 bolts are to suspend the boiler. If each bolt has to be strong enough to support 1/2 the weight of a filled boiler, what will be the diameter of the bolts? Note: each bolt m

Design of demineralizer for the Boiler water treatment

Problem description A source of water supply water with a Cationic content ( and Anionic content also ) of 123.75 ppm of CaCO3, and a Silica content ( SiO2 ) of 55.6 ppm of CaCO3. The water will be treated using a demineralizer that has two ionic exchange resins : the Anionic and the Cationic ones. The first has a capacit

Velocity

Consider the steady flow of a Casson Fluid through a rigid circular pipe of radius a, driven by a pressure gradient, show velocity is given by... Please see attachment

Physics Sample Solution: Transverse Biaxial Tensile Stress

Consider a 4-in square steel bar subjected to transverse biaxial tensile stresses of 20 ksi in the x direction and 10 ksi in the y direction. (a) Assuming the bar to be in a state of plane stress, determine the strain in the z direction and the elongations of the plate in the x and y directions. (b) Assuming the bar to be in a s

Brayton Cycle and Gas Turbine Thermal Efficiency

A large stationary Brayton cycle gas-turbine power plant delivers a power output of 100MW to an electric generator. The minimum temperature in the cycle is 300K, and the maximum temperature is 1600K. The minimum pressure in the cycle is 100 kPa, and the compressor pressure ratio is 14 to 1. The compressor has an isentropic effic

Velocity Field Between Two Plates

Two infinite parallel plates are separated by a distance h. The space between them is filled with a Newtonian fluid: density (rho), viscosity (mu). The lower plate is fixed, but the upper plate executes a sinusoidal motion. (U=A*sin(omego*t). Calculate the velocity field between the plates, and plot some representative profiles.

Thermodynamics Problem Set

1. Air in a piston/cylinder expands reversibly and adiabatic. The initial temperature is 507K and the pressure is 600Kpa. The final pressure is 120Kpa. Find a) Final temperature assuming constant specific heat. b) Work c) Mass of the air in kg 2. 30,000 kj/h is needed for a heat pump to maintain a building at 20 degrees Ce