Question

state the function of lime string plumb bob , masons square, level tube​

Answer 1

Answer:

A plumb bob, or plummet, is a weight, usually with a pointed tip on the bottom, suspended from a string and used as a vertical reference line, or plumb-line. It is a precursor to the spirit level and used to establish a vertical datum.

Answer 2

1)Plumb – bob A plumb is a weight, usually with a pointed tip on the bottom that is suspended from a string. It is used as a reference line for leveling vertical length. Ref fig 6.5(a) Mesons used this method to ensure that their constructions are perfectly upright.

2) String Line You must have seen meson using string for laying bricks of foundation. A line is described by two points, the start point and the end point, and the shortest distance between two points is a straight line. A mason uses a string line between two points (nails or line blocks etc.) and he pulls the line tight to get it the shortest distance, to make it straight, with no sag. He takes this string as a reference to complete his work.

3) Spirit level It is used to check the horizontal level of construction. The bubble in the tube should be at the center to make the level horizontal.

4) Water tube To check all points of wall are at same level, a simple water tube is used. It uses the simple principle of ‘water remains at the same level’.

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