1 In a two-peg test, a level was set up exactly midwayw between two pegs X and Y which are 50 metres apart. The readings to the pegs were: Peg X 2.394 Peg Y 1.971 The level was then set up at a point Z, 5 metres beyonc peg Y on the line XY and further readings taken as follows Peg X 2.723 Peg Y 2.330 Calculate: (a) the collimation error in the level as a percentage, (b) the staff readings required to correctly adjust the instrument.

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Volumes

Volume usually is the dimensional quantity that involves the evaluation of any three-dimensional figure enfolded inside a closed space. The SI unit (International System of Units) of volume is m3 and the dimensional unit of volume is [L3]. For estimation of the volume of any figure, various formulae are used. Another application of volume includes the reference in the sound levels, the higher the sound intensity, the louder the sound heard, and hence, the larger the volume. The SI unit of sound volume is decibels (dB).