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Dielectric strength is the maximum electric field that a material can withstand under ideal conditions without breaking down.

Dielectric strength of air is around 3.2KV/mm

Factors such as humidity, dust, temperature etc affects the dielectric strength.

The angle between true meridian and line is known as true bearing of the line. It is also known as azimuth
True Meridian is the reference direction of north pole of earth from a given station point. It is also called geographic meridian.
Magnetic Meridian
is the direction of north pole indicated by magnetic needle.
Arbitrary Meridian :
This is any assume direction to a well defined object. It may be useful for small areas. e.g A mosque is taken as reference and location of road will be mentioned with respect to this mosque. Direction of magnetic north with respect to true north is called magnetic direction.?

Volumetric efficiency is ratio between volume of water actually striking the runner of turbine and volume of water supplied to the turbine.
Overall efficiency is defined as ratio of power available at shaft of turbine to power supplied at the inlet of turbine which is also product of mechanical and hydraulic efficiency.
Ratio of power at the shaft of turbine and power delivered by water to runner is known as mechanical efficiency.
Hydraulic efficiency is defined as ratio between power given by water to runner of turbine and to the power supplied by water at inlet of the turbine.

Outermost one ring between the bark and sap wood which is not yet converted into wood is known as the cambium layer

California Bearing Ratio or CBR test is the ratio of the force per unit area required to penetrate a soil mass with a standard circular piston of 50 mm dia, at the rate of 1.25 mm/min to that of force required to penetrate sample of compacted stone having CBR of 100%.

Aeration helps prevent taste and odour problems by ensuring that oxygen concentrations remain high enough throughout the entire water column to prevent conditions of little or no oxygen (anaerobic). Aeration also helps prevent the release of phosphorus from sediments. This limits algae growth and reduces the amount of plant material present to ultimately die and decompose.

Floor area ratio (FAR) is the ratio of a building’s total floor area (zoning floor area) to the size of the piece of land upon which it is built. The terms can also refer to limits imposed on such a ratio.

Luminous intensity is the quantity of visible light that is emitted in unit time per unit solid angle.

Unit of luminous intensity is candela also called the standard candle or one lumen per steradian.

The power factor of pure resistive circuit is unity.

Form Factor = rms value/avg value

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