Virtual class 1

Which of the following statements does not apply to the care of a square?

• Store a square in a special box

• Apply a light film of oil before use

• Keep it clean at all times

• Never drop a square

To prevent rocking on an uneven surface, a surface plate has…

• Adjustable legs

• Four-point suspension

• A wedge for leveling

• Three-point suspension

The surface of a cast-iron surface plate is finished by…

• Grinding

• Filing

• Scraping

• Lapping

Which of the following statements does not apply to granite surface plates?

• They are available in several grades.

• The are appreciably affected by temperature changes.

• They are rustproof

• They are nonmagnetic

On the micrometer spindle there are…

• 25 threads per inch

• 1000 threads per inch

• 100 threads per inch

• 40 threads per inch

One complete revolution of the micrometer thimble increases or decreases the distance between measuring faces by…

• .025 in

• .0001 in

• .001 in

• .100 in

The #6 showing on the sleeve would indicate a distance between measuring faces of…

• .0150 in

• .015 in

• .600 in

• .006 in

A vernier micrometer has…

• Two scales on the thimble

• A sliding vernier bar

• An indicating dial

• Two scales on the sleeve

It is a good habit to always expose the same face of the wear block to the work surface because…

• The wringing quality of the opposite face will be preserved

• Any inaccuracy will be unilateral

• The accuracy life will be doubled

• Known inaccuracies can be easily recognized

Without the use of wear blocks, the least number of gage blocks needed from an 83-piece set to make a 2.7005" stack would be…

• Two

• Three

• Four

• Five