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Select suitable valve types for the following applications:
a. Isolating a heat exchanger.
b. Manual control of the water flow into a tank used for making up batches of sodium hydroxide solution.
c. The valves needed to isolate a pump and provide emergency manual control on a bypass loop.
d. Isolation valves in the line from a vacuum column to the steam ejectors producing the vacuum.
e. Valves in a line where cleanliness and hygiene are an essential requirement.
State the criterion used in the selection for each application.
An electron falls from the conduction band of silicon (Si) to the valence band. The band gap of Si is 1.1 eV. What is the wavelength of the photon emitted by this process? Give your answer in nm
Assume you have gas in a cylinder equipped with a piston. There are weights on the piston creating pressure down on the gas.
Determine the membrane area needed. Given: Membrane properties and mass transfer information - Develop a process schematic
1discuss an incident fire spill explosion etc that you have experienced or research one on the internet professional
A flat slab of Douglas fir wood 50.8 mm thick containing 30 wt% moisture is being dried from both sides (neglecting edges and ends). The equilibrium moisture content at the surface of the wood due to the drying air blown over it is held at 5 wt% mois..
Finding the Heat of Reaction (Enthalpy) from Heats of Formation, Calculate the heat of reaction at the standard reference state for the following reactions
Develop a mass balance for a continuous diafiltration step and indicate the volumetric flow rates and concentrations of different species in the different streams obtained.
If you are drilling in a normally pressured zone, what pressure would you expect at 12,000 ft. (TVD) (TVD is True Vertical Depth) (round off to the nearest whole number)
where and Qp are constants for a given gas-polymer pair. Consider the diffusion of hydrogen through a poly (dimethyl siloxane) (PDMSO) sheet 20 mm thick.
Determine the standard heats of Reactions. Discuss the purpose of feeding oxygen to the reactor. Assuming no heat is lost to the surroundings, estimate the temperature of the gas and slag leaving the gasifier.
In a process to produce 1000 kgmol/h acetaldehyde, ethane is fed to the reactor at 1500 kgmol/h and the fractional conversion is 0.8. The product stream contains 2 mol% CO2. Calculate the molar composition of the product stream and the fractional sel..
In the direct steelmaking reactor based on the reduction of an oxidizing foaming slag by char (carbon) particles and droplets of iron containing 2% carbon. Estimate the total surface area of char and iron droplets needed to achieve the smelting ..
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