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All fluids are compressible, their density will change as pressure changes.
Under steady conditions, and provided that the changes in pressure are small and it is incompressible and has constant density.
Hence, the direction of flow for steady incompressible flow through a closed conduit of uniform cross section will always be from higher to lower pressure.

The yield of well is the rate at which water percolates into the well under the safe maximum working head or critical depression head.
For a standard tube well the depth is 30 -60 m and the yield is 40-45L/s. (Can be upto 50L/s).
For a shallow tube well, the depth is less than 30 m the yield is 20L/s.
For a deep tube well the yield is 200 L/s.

In Abel’s Process, timber surface is cleaned and it is coated with a dilute solution of sodium silicate.
A cream-like paste of slaked fat lime is then applied and finally, a concentrated solution of silicate of soda is applied on the timber surface.
This process is quite satisfactory in making the timber fire- resistant.

The standard consistency or normal consistency of a cement paste is defined as the amount of water (in percentage by weight of dry cement) that permits the vicat plunger to penetrate to a depth of 5 to 7 mm from the bottom of the vicat mould.
For determination of initial setting time it is needed to make cement paste by gauging the cement with 0.85 times the water re-quired to give a paste of standard consistency.
Water content for consistency is 0.78W.

The per unit value of any quantity is defined as the ratio of actual value in any unit and the base or reference value in the same unit.

Value engineering is a systematic method which strives to improve the value of a product either by enhancing its functionality or reducing the cost.

Inventory control aims at maintaining optimum stock for production by reduced reordering cost and material hold cost.

Slack and Float refer the same meaning, But
In CPM an activity oriented technique it is called Float.

PERT an event oriented technique it is called Slack.

In order to change the existing crystal structure of any metal, it has to be heated beyond its recrystallization temperature.

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