A. Metamorphic rock

B. Argillaceous rock

C. Calcareous rock

D. Siliceous rock

A. 0.25 %

B. 1.0 %

C. 1.5 %

D. 2 %

A. Roasting is not necessary if iron ore is an oxide

B. Impurities float on the molten iron as slag

C. The slag contains lime about 45%

D. All the above

A. Granite

B. Basalt

C. Slate

D. Pumice

A. Increasing moisture content

B. Decreasing moisture content

C. Increasing strength of timber

D. None to these

A. Quarrying of stones

B. Blasting of stones

C. Seasoning of stones

D. Dressing of stones

A. Is obtained by purifying pig iron

B. Is manufactured in required shapes

C. May contain 2 to 5 per cent of carbon with other impurities

D. All the above

A. Marble

B. Lime stone

C. Compact sand stone

D. Granite

A. Are non-magnetic

B. Possess high electrical resistance

C. Possess low coefficient of expansion

D. All the above

A. No grey or white deposits appear on the surface, the brick is free from soluble salts

B. 10 percent surface is covered with grey or white deposits, the brick has slight efflorescence

C. 50 percent surface is covered with grey or white deposits, the brick has serious efflorescence

D. All the above

A. Low-molecular substances are removed from the high molecular substance

B. The reaction proceeds with an evolution of ammonia

C. The reaction proceeds with an evolution of hydrogen chloride

D. All of the above

A. Is a natural fibrous mineral substance

B. Is composed of hydrous silicates of calcium and magnesium (CaSiO₃, 3MgSiO₃)

C. Contains iron oxide and alumina

D. All the above

A. Quartz

B. Mica

C. Gypsum

D. None of the above

A. 4 % to 6 %

B. 10 % to 12 %

C. 15 % to 20 %

D. 100 %

A. Laterite

B. Marble

C. Limestone

D. All the above

A. 25 mm to 50 mm

B. 50 mm to 100 mm

C. 100 mm to 125 mm

D. 125 mm to 150 mm

A. Both A and R is true and, R is the correct explanation of A

B. Both A and R is true but R is not the correct explanation of A

C. A is true but R is false

D. A is false but R is true

A. English bond

B. Double Flemish bond

C. Zigzag bond

D. Single Flemish bond

A. Becomes rigid when moulded at suitable pressure and temperature

B. At 127°C to 177°C permanently set and further application of heat does not soften it

C. Chars at 343°C

D. All the above

A. Lime (CaO) 45%

B. Silica (SiO₂) 35%

C. Alumina (Al₂O₃) 12% and MgO, CaSO₄, KMnO₂ and FeO 8%

D. All the above

A. Actinolite asbestos

B. Amosite asbestos

C. Anthophylite asbestos

D. All the above

A. 50 mm

B. 70.6 mm

C. 100 mm

D. 150 mm

A. 5 %

B. 10 %

C. 15 %

D. 20 %

A. Clay, lime stone is used as flux

B. Lime stone, clay is used as flux

C. Quartz, lime stone and argillaceous iron ores are used as flux

D. All the above

A. 18 cm × 8 cm × 8 cm

B. 19 cm × 9 cm × 9 cm

C. 20 cm × 10 cm × 10 cm

D. 21 cm × 11 cm × 11 cm

A. A process of removing sap

B. Creosoting

C. Painting with sodium silicate

D. Coating with tar

A. Acid resisting material

B. Non-corrosive material

C. Corrosive material

D. Heating-resisting material

A. About 20% to 30% of alumina

B. About 50% to 60% of silica

C. Not more than 5% of lime

D. All the above

A. Structural works in beams, joints and girders

B. Small sized water pipes

C. Columns and struts

D. None of these

A. 50 %

B. 40 %

C. 30 %

D. 25 %

A. 5 to 10 %

B. 20 to 30 %

C. 50 to 60 %

D. 70 to 80 %