Building materials and Construction. Sheet - 15
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1) Question.
The most durable varnish is
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2) Question.
To give a brilliant finish, the type of varnish used, is
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3) Question.
Resins are
Answer.- Trees emit liquid or semiliquid resins along with other substances including gums, essential oils, and other substances.
- They are thought to be created by the oxidation of the essential oils and are made of carbon, hydrogen, and oxygen.
- Plant resins are valuable for making food glazing agents, adhesives, and varnishes.
- In addition, they serve as valuable raw materials for the synthesis of other chemical compounds and are the source of incense and perfume ingredients.
- Acrylic, alkyl, or polyurethane are examples of synthetic resins used in the production of varnishes.
- Natural resins like rosin, kauri gum, dammar, amber, mastic, copal, sandarac, balsam, elemi, and shellac are used to make varnishes.
- Resins are employed as components of varnishes because they are soluble in spirit but insoluble in water.
- And varnishes were created by their resinous solvent solution.
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4) Question.
Priming consists of
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5) Question.
The most fire resistant paints are:
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6) Question.
Snowcrete is one of the patent forms of
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7) Question.
Stuco paints are suitable for
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8) Question.
Bitumen paints offer
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9) Question.
Oil varnish generally consists of
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10) Question.
Spirit varnish generally consists of
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11) Question.
The header bond is generally used for
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12) Question.
The bond in which headers and stretchers are laid in alternate courses and every stretcher course is started with a three fourth brick bat, is known as
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13) Question.
Herringbone bond is used for
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14) Question.
Thealignment of cross joint along the plumb line is
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15) Question.
To construct a 10 cm thick partition wall, you will prefer
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16) Question.
The type of bond in a brick masonry containing alternate courses of stretchers and headers, is called
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17) Question.
To stagger vertical joints in successive courses of a wall, piece of brick is generally used at the end of the course, which is known as
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18) Question.
Exposed protions of vertical surface at right angles to the door or window frame, are known as
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19) Question.
The vertical sides of a door and window openings provided in a wall, are known as
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20) Question.
The piece of a brick cut with its one corner equivalent to half the length and half the width of a full brick, is known as
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