Site Layout Review Questions (15/96) -- Carpentry Refresher Program Manual

Site Layout Review Questions Review Questions - The telescope of a builder’s level swings: - Horizontally - Vertically - What type of instrument uses a split bubble to level the instrument? - On the tilting level, what type of bubble is used on the base plate? - The telescope that shows the clearest image is one that shows and: - Erect image - Inverted image - Two horizontal crosshairs, in addition to the main one, are seen in some telescopes. What is the name and function of these cross hairs? - Name and define the following abbreviations: - B.M. - L.S. - B.S. - F.S. - I.H. - T.P. - E.L. - When a builder’s level is set up over a hard surface such as concrete, what special consideration must be given? - Give two reasons why backsight and foresight should be approximately equal in distance when setting up an instrument. - What is the “rule of thumb” when adjusting footscrews? - What is meant by the term parallax in relation to the telescope on a builder’s level and how is it corrected? - True or False: - The best material for cleaning the builder’s level is a light oil because rust will not form. - Levelling screws on three point levels may be adjusted individually. - The cross hairs must be adjusted whenever the distance to the target changes significantly.