Surface Finish MCQ - Machinist(Set-1) with Answers

11) The stylus of the surface indicator is made of

Answer is:

Diamond

12) One micro-inch is equal to

Answer is:

One millionth of an inch

13) Which one of the following statements is NOT correct ?

Lay is the direction of the predominant surface pattern, ordinarily determined by the production method used.

Normal profile is the contour of a surface in a plane perpendicular to the surface, unless some other angle is specified

One micrometer is equal to one thousandth of a millimeter.

Flaws are irregularities, which occur at one place or at relatively frequent or widely varying intervals in a surface

Answer is:

Normal profile is the contour of a surface in a plane perpendicular to the surface, unless some other angle is specified

14) A block level can be used for

Answer is:

Checking vertical and horizontal alignment

15) Which one of the following processes is used for removing scratches from the previous operation

Answer is:

Polishing

Explanation:

Polishing and buffing are finishing processes for smoothing a work piece's surface using an abrasive and a work wheel or a leather strop. Technically polishing refers to processes that use an abrasive that is glued to the work wheel, while buffing uses a loose abrasive applied to the work wheel.