Explain the purpose of a three-valve manifold in closed tank level measurement installations.

Physics

1 answer:

mamaluj [8]3 years ago

7 0

Answer:

A three valve manifold serves to protect the capsule from being exposed to pressures above the acceptable range and also enables transmitter isolation from the loop of the process

In closed tank level measurement installations the pressure of the gas if presence of gas on top of the liquid will need to be taken account by the use of a reference connection from the level transmitter to the tank top. The valve used in pressure equalization is kept close when the process system is operating normally.

In the event that the transmitter is removed or put into service, it is necessary to ensure that the gas phase which is at the higher pressure is does not over-range the Differential Pressure DP capsule

Explanation:

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Answer: The amount of Zn plated from a solution is 1.07× $10^{-1}$ grams.

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The amount of charge of 1 mole of electrons = 96485.3 coulombs ( FARADAY’S CONSTANT )

Now, the number of electrons = amount of charge given / charge of 1 mole of electrons

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According to reaction occurring, 2 moles of electrons are required to convert 1 mole of to Zn which is plated on the electron, so the moles of Zn plated will be half the moles of electrons, i.e.,

$\frac{3.29*10^{-3} }{2}$ = 1.645× $10^{-3}$