27) A product is said to have the quality when

its shape and dimensions are within the limits

it appears to be very good

it is fit for use

the choice of material is right

Answer is:

it is fit for use

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

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28) The direction of the predominant surface pattern ordinarily determined by the production method is known as

Lay

Roughness

Waviness

Surface texture

Answer is:

Lay

Explanation:

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

The direction of the predominant surface pattern ordinarily determined by the production method is known as

29) Which one of the following processes is used to convert the surface of steel into a high chromium iron ?

Calorising

Sherardising

Chromising

Vitreous enamelling

Answer is:

Chromising

Explanation:

Chromising is a surface treatment carried out at elevated temperatures in which an alloy is formed by the inward diffusion of chromium into the base metal.

30) Stoving finishes, retain their colour during the stoving process which is done in a convection over at ?

90 Degree Centigrade to 100 Degree Centigrade

110 Degree Centigrade to 120 Degree Centigrade

130 Degree Centigrade to 140 Degree Centigrade

150 Degree Centigrade to 160 Degree Centigrade

Answer is:

110 Degree Centigrade to 120 Degree Centigrade

31) Which one of the following is the application for 'Alumina' polishing abrasive ?

Bar composition for finishing

Finishing of precious metals

Used in lump form on wheels for grease removal

Hard abrasive for cutting or polishing

Answer is:

Hard abrasive for cutting or polishing

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