Basic Civil Engineering MCQ - Types and Uses of Paints

1. ________ Oil is thicker and darker than raw oil, which is used as vehicle?
a) Double boiled linseed oil
b) Boiled linseed oil
c) Pale boiled linseed oil
d) Linseed oil

Answer: b
Explanation: Raw linseed oil is thin and pale. It requires more time to dry. Boiled linseed oil is thicker and darker than raw oil and dries quickly.

2. Which of the below is a characteristic of an ideal paint?
a) Health of the worker is unaffected
b) Costly
c) Pleasant smell
d) Dries rapidly

Answer: a
Explanation: The person applying the paint should be safeguarded from any toxic or harmful ingredients. The paint should economic, the smell is typically bit pungent. Paint should dry at a reasonable time, not slowly or rapidly.

3. _________ base is generally used for priming coat to new wood work?
a) Antimony white
b) Titanium dioxide
c) Aluminium powder
d) Red lead

Answer: c
Explanation: Aluminium powder forms bulk of aluminium paints. It prevents warping and cracking of wood when applied to a new wood work.

4. In how many layers is oil paint applied to a surface?
a) 3
b) 4
c) 2
d) 1

Answer: a
Explanation: Three layers of varying compositions are applied. They are primers, undercoats and finishing coats.

5. Emulsion Paints contain:
a) Nitro cotton
b) Zinc white
c) White lead
d) Polyvinyl acetate

Answer: d
Explanation: Nitro cotton is an element contained in cellulose paints, zinc white and white lead are components of enamel paints.

6. Anticorrosive paint is ___________ in colour
a) Blue
b) White
c) Black
d) Yellow

Answer: c
Explanation: It consists of pigments like chromium oxide, lead or zinc chrome. It is mixed with sand and added to the paint. These pigments make the paint blackish in colour.

7. In which of the below, it is not necessary to remove existing paint to apply a new one?
a) Aluminium paints
b) Cement paints
c) Oil paints
d) Enamel paints

Answer: b
Explanation: They are suitable for painting fresh plasters having high alkalinity. They can be directly applied on existing paint, hence they are economic.

8.Synthetic rubber paints are prepared from:
a) Resin
b) Rubber
c) Synthetic fibres
d) Polyvinyl Chloride

Answer: a
Explanation: Synthetic rubber paint is prepared from resins. These are chemically resistant and offer protection against heavy rain, sunlight.

9. Cement paints require a smooth surface to be applied on.
a) True
b) False

Answer: b
Explanation: Cement requires a rough surface for its application. It can adhere better onto rough surfaces than smoother ones

10. What is used to make paints odourless to an extent?
a) Flat latex
b) Celluloid sheets
c) Acrylic compound
d) Plioway resins

Answer: d
Explanation: These eliminate the odour present in alkyd, stain blocking primers. It also aims to reduce VOC content (volatile organic compound), which is harmful.