This set of Basic Civil Engineering Multiple Choice Questions & Answers (MCQs) focuses on “Varnish”.
1. How many ingredients are varnish composed of?
a) 2
b) 3
c) 4
d) 5
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Explanation: The three components of varnish are resins, driers and solvents.
2. Which of the below is not an artificial resin?
a) Vinyl
b) Alkyl
c) Phenolic
d) Shellac
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Explanation: Shellac is a natural resin obtained from the secretion of the female lac bug. All other options are artificially obtained.
3. Driers in varnish are used as:
a) Reducers
b) Retarders
c) Accelerators
d) Oxidisers
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Explanation: Drier is the ingredient in varnish which accelerators the process of drying of applied varnish.
4. Wood naphtha, a cheap variety of resin, is also called:
a) Methyl alcohol
b) Synthetic rubber
c) Acetylene
d) Ethanol
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Explanation: Methyl alcohol was produced chiefly as a by-product of the destructive distillation of wood. Hence, the name wood naphtha.
5. The word varnish is derived from the word:
a) Latin varne
b) Latin Vernix
c) Greek Vernix
d) Green varne
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Explanation: Varnish comes from Latin word vernix, which means odorous resin.
6. Which of the below is an oil based varnish?
a) Urethane
b) Acrylic
c) Polyurethane
d) Urea
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Explanation: Urethane and Acrylic are water based resins.
7. Which of the below is most commonly used resin in commercial varnishes?
a) Alkyd
b) Phenolic
c) Polyurethane
d) Satin Gloss
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Explanation: Alkyd resin is less expensive. It is a type of polyester resin and its combined with alcohol and acid. It is cooked with oil to create varnish.
8. ________ Varnish is also called French varnish and used for furniture.
a) Oil
b) Water
c) Acrylic
d) Spirit
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Explanation: Spirit varnish is quick drying. It is not very resistant to weathering and is generally used for furniture.
9. Water based finishes have a blue tint to it.
a) True
b) False
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Explanation: The water based vanishes have a blue tint and when applied to wood, it looks pale, cold and washed out.
10. Solvents contain high levels of polyunsaturated fatty acids.
a) True
b) False
View Answer
Explanation: Drying oils are the ones that contain high levels of polyunsaturated fatty acids. These include linseed oil, tung oil and walnut oil.
Sanfoundry Global Education & Learning Series – Basic Civil Engineering.
To practice all areas of Basic Civil Engineering, here is complete set of 1000+ Multiple Choice Questions and Answers.