11.Leveling Instruments & 8.Elevations

A simple device that can be used to determine level marks over large spans with great accuracy. It usually consists of a narrow hose filled with water with a clear plastic tube at each end

• spirit level

• H2O sensor

• water level

• bubble level

The wiggling or jumping of an image is known as

• unfocused

• parallax

• blurry vision

• ants in my pants

H.I. stands for

• Height of Intention

• Help with Instruction

• Height of Instrument

• Hungry Italians

An engineer's rod has graduations that are in feet, tenths of a foot and hundredths of a foot.

• FALSE

• TRUE

a point of known or assumed elevation that is permanent or semi-permanent.

• benchmark

• datum point

• witness post

• elevation

The instrument operator is looking backward to a known point.

• reverse view

• backcheck

• backdraft

• backsight

The instrument operator is looking forward to a new point.

• look ahead

• foresight

• looking good

• new benchmark

Secondary benchmarks established by local agencies as control points for local elevations

• datum point

• benchmark

• elevation view

• backsight

Located at the top of the instrument and makes distant objects look larger and therefore nearer.

• spirit level

• telescope

• zoom function

• cross hair

Special tool with either three or five fixed laser beams

• transit level

• Total Station

• pocket laser