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Question
What paint is applied on steel and NOT enclosed in concrete? 
A.
Yellow lead
B.
Green lead
C.
Black lead
D.
Red lead
Answer ( Option D)

Red lead

Solution

Oil paint : This is the ordinary paint and it is generally applied in three coats of varying compositions. They are respectively termed primers, undercoats, and finishing coats. This paint is cheap and easy to apply and it possesses good opacity and low gloss. 
Plastic paint : This paint contains the necessary variety of plastics and it is available in the market under different trade names. The application of plastic paint can be done either by brush painting or spray painting. This paint possesses a pleasing appearance and is attractive in color. This paint is widely used for showrooms, auditoriums, etc. 
Anticorrosive paint : This paint essentially consists of oil and a strong drier. A pigment such as chromium oxide, lead, red lead or zinc chrome is taken and after mixing it with some quantity of very fine sand, it is added to the paint. 
Asbestos paint : This is a peculiar type of paint and it is applied on the surfaces which are exposed to acidic gases and steam. 
Bituminous paint : This paint is prepared by dissolving asphalt or mineral pitches or vegetable bitumen in any type of oil or petroleum. This paint presents a black appearance and it is used for painting ironwork underwater.

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