বিল্ডিং ম্যাটেরিয়াল

• ০০। A 1st class brick immersed in water for 24 hours, should not absorb water (by weight) more than
• ক) 10%
• খ) 15%
• গ) 20%
• ঘ) 25%
• ঙ) 5%.

• ০১। A badly mixed cement concrete results in
• ক) segregation
• খ) bleeding
• গ) honey combing
• ঘ) none to these.

• ০২। A bull nose brick is not used for
• ক) rounding off sharp corners
• খ) pillars
• গ) decoration purpose
• ঘ) arches.

• ০৩। A ferrous metal is
• ক) cast iron
• খ) wrought iron
• গ) steel
• ঘ) all the above.

• ০৪। A good brick earth should contain :
• ক) about 20% to 30% of alumina
• খ) about 50% to 60% of silica
• গ) not more than 5% of lime
• ঘ) about 5 to 6% of oxide of lime
• ঙ) All the above.

• ০৫। A good quality stone absorbs water less than
• ক) 5%
• খ) 10%
• গ) 15%
• ঘ) 20%
• ঙ) 25%.

• ০৬। A piece of timber whose thickness and width are respectively 5 cm and 10 cm is called
• ক) slate
• খ) plank
• গ) board
• ঘ) strip.

• ০৭। A prime coat is given to steel work with
• ক) an oxide of iron paint
• খ) a mixture of white lead and lead paint
• গ) a special paint
• ঘ) cement paint.

• ০৮। A pug mill is used for
• ক) softening brick earth
• খ) moulding brick earth
• গ) tempering brick earth
• ঘ) providing brick earth
• ঙ) all the above.

• ০৯। A rock contains only one mineral. It is called
• ক) homogeneous
• খ) non-homogeneous
• গ) monomineralic
• ঘ) polymineralic.

• ১০। A stone is rejected if it absorbs water more than
• ক) 5%
• খ) 10%
• গ) 15%
• ঘ) 20%
• ঙ) 25%.

• ১১। A volatile substance added to a paint to make its application easy and smooth, is known as
• ক) base
• খ) solvent
• গ) vehicle
• ঘ) none to these.

• ১২। A well seasoned timber may contain moisture up to
• ক) 4 to 6%
• খ) 6 to 8%
• গ) 8 to 10%
• ঘ) 10 to 12%.

• ১৩। According to IS 399-1963, the weight of the timber is specified at
• ক) 8% moisture content
• খ) 10% moisture content
• গ) 12% moisture content
• ঘ) 14% moisture content.

• ১৪। According to ISI, bitumen is classified into
• ক) 2 grades
• খ) 4 grades
• গ) 6 grades
• ঘ) 8 grades.
• ঙ) 10 grades.

• ১৫। Acrylic is the name of
• ক) cellulose resin
• খ) alkyd resin
• গ) methyl metha crylate
• ঘ) cumarone-indene.

• ১৬। Acrylic sheets
• ক) possess 10 to 17 times greater breakage resistance than that of glass of equivalent thickness
• খ) are generally unaffected by most household detergents
• গ) possess the light transmission rate of 93%
• ঘ) are available in various shapes
• ঙ) all the above.

• ১৭। Age of a tree may be ascertained by
• ক) radius of its stem
• খ) circumference of its stem
• গ) number of branches
• ঘ) number of annual rings.

• ১৮। Apiece of sawn timber whose cross-sectional dimensions exceed 5 cm, in one direction and 20 cm in the other direction, is called a
• ক) cant
• খ) deal
• গ) baulk
• ঘ) strip.

• ১৯। Asbestos
• ক) is an excellant insulator for heat and electricity
• খ) is fire-proof and acid proof
• গ) has sp. gravity equal to 3.10
• ঘ) is smooth like glass and silk
• ঙ) All the above.