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a ferric chloride dosage of 40 mg/l and an equivalent dosage of lime are used to coagulate a water.
(a) how many pounds of ferric chloride per million gallons are used?
(b) how many pounds of hydrated lime per million gallons are used, assuming a purity of 70 % CaO?
(c) how many pounds of ferric hydroxide are theoretically produced per million gallons of water treated?
the engine develops a maximum torque of 210ft-lb at 3600 rev/min. what is the maximum grade this vehicle could ascend, on a paved surface, while the engine is developing maximum torque (assume that the available tractive effort is the engine-gener..
An important dimensionless parameter in certain types of fluid flow problems is the Froude number defined as V/(gl)^1/2 where V is a velocity, g the acceleration of gravity, and l a length.
A section of highway has a speed-flow relationship of the form "q = au^2 + bu" It is known that at capacity (which is 3100 veh/hr) the space mean speed of traffic is 28mi/hr.
What superelevation rate would you recommend for a roadway with a design speed of 100 km/hr and a radius of curvature of 500 m? Assume f = 0.11.
The crane hoists a uniformly distributed load C. the two identical motors at A an power through gearboxes operating at maximum output speed of 100 rpm.the load is lifted by winding cable onto spindles attached to the output shaft of each gear box.
The 2 Mg car is being towed by a winch. If the winch exerts a force of T=105s on the cable, where 14m is the displacement of the car in meters, determine the speed of the car when s , starting from rest. Neglect rolling resistance of the car.
A simple steam power plant operates at steady state with water circulating through the components with a mass flow rate of 100 kg/s. Stray heat transfer, kinetic energy and potential energy effects are negligible.
Air flows steadily between two sections in a long, straight portion of 4 in. inside diameter pipe (D1=D2). The uniformly distributed temperature and pressure at each section are p1=100psia, p2=18.4psia, T1=540 R and T2=453 R.
the pressure inside a commercial airliner is maintained at 1.00 ATM. what is the net upward force exerted on a (1.0 m)(200 cm) cabin door if the outside pressure is 0.30 ATM?
If the normal stress is 2,500 psi, Poisson's ratio is 0.25 and Young's modulus is 10,000 ksi, calculate the normal strain.
A steel tank hold 120 ft^3 of water at atmospheric pressure(14.7psi and 68.4 degrees f). the water is subjected to a 100 fold increase in pressure. determine the initial weight and final density of the water if the volume decreases by .545 ft ^3.
A stack gas at 1.1 atmospheric pressure has a mixture below. what will be the change in partial pressure of carbon dioxide if the gas temperature is lowered from 2000 degrees K to 1000 degrees K
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