Q.1) The colour of mineral in its powered form is known as –
A) Streak
B) Lusture
C) Texture
D) Structure
Option (A)
Q.2) Rocks having silica as main constituent are called –
A) Calcareous rocks
B) Argillaceous rocks
C) Silicious rocks
D) None of the above
Option (C)
Explanation :
Role of silica in rocks are :
1. It acts as a cementing material for binding together the individual particles or grains to form a solid rock.
2. It acts as framework material whixh is responsible i forming basic structure of rocks.
3. It plays an important role in determining the composition of magma, which is molten rock beneath the Earth’s surface. The amount of silica in magma affects its viscosity, or resistance to flow, and determines whether the magma will erupt explosively or flow more smoothly.
4. It is resistant to weathering and erosion i.e. it can persist in the environment for long periods of time.
Q.3) Stone used for railway ballast is –
A) Sandstone
B) Dolomite
C) Marble
D) Basalt or trap basalt
Option (D)
Q.4) The porosity of good building stone should not be less than –
A) 3%
B) 5%
C) 10%
D) 20%
Option (B)
Q.5) The tool used for quarrying of stones is –
A) Dipper
B) Spalling hammer
C) Jumper
D) Priming needle
Option (C)
Q.6) The red colour of brick is due to –
A) Iron oxide
B) Silica
C) Magnesia
D) Alumina
Option (A)
Q.7) The bricks used for lining of furnaces are –
A) Under burnt bricks
B) Over burnt bricks
C) Refractory bricks
D) None of the above
Option (C)
Q.8) Swelling of bricks is known as –
A) Bloating
B) Lamination
C) Chuffs
D) Efflorescence
Option (A)
Q.9) Plaster of Paris is obtained from the calcination of –
A) Bauxite
B) Limestone
C) Dolomite
D) Gypsum
Option (C)
Q.10) Stainless steel resists corrosion due to –
A) Carbon
B) Manganese
C) Chromium
D) Sulphur
Option (C)
Q.11) The decay of timber caused by alternate wetting and drying is called –
A) Dry rot
B) Wet rot
C) Foxiness
D) Doatiness
Option (B)
Q.12) Rusting can be prevented by applying coating of –
A) Red lead
B) White lead
C) Zinc oxide
D) Bitumen
Option (A)
Q.13) The base material for distemper is –
A) Lime
B) Chalk
C) Snowcem
D) Cement
Option (B)
Q.14) The roof having slope in all four directions is called –
A) Hip-pitch roof
B) Shed roof
C) Gambrel roof
D) North light roof
Option (A)
Q.15) Lower edge of the inclined roof surface is called –
A) Pitch
B) Eves
C) Cleat
D) Gable
Option (B)
Q.16) The joints provided in wooden floor are –
A) Tongue and Groove
B) Butt
C) Dove tail
D) Tee joint
Option (A)
Q.17) Broke bricks or stone chips are also called –
A) Brokomite
B) Scrap
C) Spall
D) Wastage
Option (C)
Q.18) The number of steps in a flight should not be less than –
A) 12
B) 3
C) 2
D) 5
Option (B)
Q.19) Dog legged stairs are –
A) Straight stair
B) Quarter turn stair
C) Half turn stair
D) Three fourth stair
Option (C)
Q.20) The percentage of carbon in steel is –
A) 0.1 – 0.2%
B) 0.15 – 1.5%
C) 1 – 3%
D) 2 – 4.5%
Option (B)
