GATE 2021 AR – Question 51

Building Construction, Materials, and Structural Systems · Different types of building materials for walls, floor, roof, finishes, repair and retrofitting, acoustic & insulation materials, damp prevention · 2 marks · Multiple select

Which statements about surface paint are correct according to the source item?

High pigment-volume concentration makes paint glossy.
Vehicle is the volatile part of paint.
The paint base is usually metal oxides.
High VOC content is preferred.

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Show answer and explanation

Correct answer: (B) Vehicle is the volatile part of paint.; (C) The paint base is usually metal oxides.

Explanation

The official key selects B, C. C reflects conventional oxide-based paint bases; high pigment concentration generally reduces gloss, and high VOC is not preferred. Terminology caveat: vehicle is used inconsistently; the film-forming binder is nonvolatile, while solvent/thinner evaporates. Preserve keyed B as the source’s usage rather than teaching that every definition of vehicle means only the volatile solvent.

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