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ASVAB · General

What is the purpose of a level (such as a bubble/spirit level)?

Correct answer

To determine whether a surface is perfectly horizontal (level) or vertical (plumb)

  1. A To measure temperature
  2. B To determine whether a surface is perfectly horizontal (level) or vertical (plumb)
  3. C To cut wood
  4. D To tighten bolts

Why this is the answer

A LEVEL (bubble/spirit level) is used to determine whether a surface is perfectly HORIZONTAL ('level') or VERTICAL ('plumb'). ASVAB Shop Information tests measuring/layout tools. The bubble in the liquid-filled vial centers between the lines when the surface is level or plumb. Essential for construction, hanging shelves/pictures, installing appliances, and building square structures. Knowing the level checks for horizontal (level) and vertical (plumb) is commonly tested. Related: a PLUMB BOB uses gravity to find true vertical.
Source: ASVAB Shop Information — Level

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