1 In a two-peg test, a level was set up exactly midway 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...

Extracted text: 1 In a two-peg test, a level was set up exactly midway 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 beyond 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.