1. In a mortar, the binding material is
a) cement
b) sand
c) surkhi
d) cinder
2. Lacquer paints
a) are generally applied on structural steel
b) are less durable as compared to enamel paints
c) consist of resin and nitro-cellulose
d) all the above.
3. Wrought iron contains carbon upto
a) 0.25%
b) 1.0%
c) 1.5%
d) 2%.
4. Pick up the polymineralic rock from the following:
a) Quartz sand
b) Pure gypsum
c) Magnesite
d) Granite
5. Pick up the correct statement from the following:
a) For thin structures subjected to wetting and drying, the water cement ratio should be 0.45
b) For mass concrete structures subjected to wetting and drying, the water ratio should be 0.55
c) For thin structures which remain continuously under water, the water-cement ratio by weight should be 0.55
d) All the above.
6. Ultimate strength to cement is provided by
a) Tricalcium silicate
b) Di-calcium silicate
c) Tri-calcium aluminate
d) Tetra calcium alumino ferrite.
7. Elastomers can extend upto
a) five times their original dimensions
b) seven times their original dimensions
c) ten times their original dimensions
d) three times their original dimensions.
8. Bitumen felt
a) is used as water proofing material
b) is used as damp proofing material
c) is made from bitumen and hessian fibres
d) all the above.
9. In the method of condensation polymerization,
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 the above.
10. In the cement the compound quickest to react with water, is
a) Tricalcium aluminate
b) Tetra-calcium alumino-ferrite
c) Tricalcium silicate
d) Dicalcium silicate.
11. The initial setting time of lime-pozzolana, is
a) 30 minutes
b) 60 minutes
c) 90 minutes
d) 120 minutes.
12. The clay to be used for manufacturing bricks for a large project, is dugout and allowed to weather throughout
a) the monsoon
b) the winter
c) the summer
d) none of these.
13. The rocks which are formed due to cooling of magma at a considerable depth from earth's surface are called
a) Plutonic rocks
b) Hypabyssal rocks
c) Volcanic rocks
d) Igneous rocks.
14. Quartzite is a
a) metamorphic rock
b) argillaceous rock
c) calcareous rock
d) Igneous rocks
15. The variety of pig iron used for manufacture of wrought iron, is
a) Bessemer pig
b) Grey or foundry pig
c) White forge pig
d) Mottled pig.16. Sand stone is
a) sedimentary rock
b) metamorphic rock
c) igneous rock
d) volcanic rock.
17. If the furnace is provided with insufficient fuel at low temperatures, the type of pig iron produced, is called
a) Bessemer pig
b) Grey or foundry pig
c) White or forge pig
d) Mottled pig.
18. Stainless steel contains
a) 18% of chromuim and 8% nickel
b) 8% of chromium and 18% of nickel
c) 12% of chromium and 36% of nickel
d) 36% of chromium and 12% of nickel.
19. Pick up the hypabyssal rock from the following:
a) Granite
b) Dolerite
c) Basalt
d) All the above.
20. Depending on the chemical composition and mechanical properties, iron may be classified as
a) cast iron
b) wrought iron
c) steel
d) all the above.
21. Wrought iron contains carbon about
a) 1.5% to 5.5%
b) 0.5% to 1.75%
c) 0.1% to 0.25%
d) none to these.
22. The main constituent of fly-ash, is
a) aluminium oxide
b) silica
c) ferrous oxide
d) All of these.
23. Bitumen in
a) solid state, is called asphalt
b) semi fluid state, is called mineral tar
c) fluid state, is called petroleum
d) all the above.
24. The plastics made from cellulose resin
a) are as clear as glass
b) are tough and strong
c) possess excellent electrical properties
d) All the above.
25. Kaolin is chemically classified as
a) metamorphic rock
b) argillaceous rock
c) calcareous rock
d) silicious rock.
26. Which one of the following is acid resistant asbestos:
a) actinolite asbestos
b) amosite asbestos
c) crocidolite asbestos
d) All the above.
27. Due to attack of dry rot, the timber
a) cracks
b) shrinks
c) reduces to powder
d) none of these.
28. Brittleness of cold is due to an excess of
a) sulphur
b) carbon
c) phosphorus
d) silicon.
29. For the manufacture of Portland cement, the proportions of raw materials used, are
a) lime 63% ; silica 22% ; other ingredients 15%
b) lime 22% ; silica 63% ; other ingredients 15%
c) silica 40% ; lime 40% ; other ingredients 20%
d) silica 70% ; lime 20% ; other ingredients 10%.
30. Asbestos cement
a) is brittle
b) warps due to changes in humidity
c) strength is lowered when saturated by water
d) all the above.
31. Gniess is obtained from
a) igneous rocks
b) metamorphic rocks
c) sedimentary rocks
d) sedimentary metamorphic rocks.
32. The rocks formed by gradual deposition, are called
a) sedimentary rocks
b) igneous rocks
c) metamorphic rocks
d) none of these.
33. Galvanising means covering iron with a thin coat of
a) tin
b) zinc
c) glaze
d) coal tar.
34. For preparing porcelains, the clay should be
a) sufficiently pure
b) of high degree of tanacity
c) of good plasticity
d) All the above.
35. Polymerization helps to improve the property of
a) strength
b) rigidity
c) elasticity
d) all of these.
36. Good quality stones must
a) be durable
b) be free from clay
c) resist action of acids
d) all the above.
37. Sewer pipes are made of
a) earthen ware
b) stone ware
c) refractory clay
d) all the above.
38. Fibre glass
a) retains heat-longer
b) has a higher strength to weight ratio
c) does not decay
d) all the above.
39. Pick up the correct statement from the following:
a) The theory of formation of concrete is based on the phenomena of formation of voids
b) The bulking of sand is taken into account while volumetric proportioning of the aggregates
c) The dry sand and the sand completely flooded with water, have practically the same volume
d) All the above.
40. Pick up the correct statement from the following:
a) In stone arches, the stones are placed with their natural beds radial
b) In cornices, the stones are placed with their natural beds as vertical
c) In stone walls, the stones are placed with their natural beds as horizontal
d) All the above.
41. The commonly used colour pigment in paints, is
a) ambers
b) carbon black
c) lamp black
d) all the above.
42. Varnish is a transparent or semi-transparent solution of resinuous substances in
a) alcohol
b) linseed
c) turpentine
d) all the above.
43. Initial setting time of cement for asbestos cement products should be not less than
a) 30 minutes
b) 50 minutes
c) 75 minutes
d) 90 minutes.
44. The variety of pig iron used for the manufacture of steel by Bessemer process, is
a) Bessemer pig
b) Grey pig
c) White forge pig
d) Mottled pig.
45. For melting one tonne of cast iron
a) 700 m3 air is required
b) 20 kg limestone is required
c) one quintal coke is required
d) all the above.
46. For filling cracks in masonry structures, the type of bitumen used, is
a) cut-back bitumen
b) bitumen-emulsion
c) blown bitumen
d) plastic bitumen.
47. Plastic
a) is an organic substance
b) finished products are rigid and stable at normal temperature
c) is capable of flow when necessary heat and pressure are applied
d) All the above.
48. Vanadium steel is generally used for
a) railway switches and crossing
b) bearing balls
c) magnets
d) axles and springs.
49. Pick up the correct statement from the following:
a) In basic Bessemer process, the steel heats the converter
b) In open-hearth process, the furnace heats the steel
c) In Siemens process, the impurities of pig iron are oxidised by the oxygen of the ore
d) all the above.
50. The process of manufacturing steel by heating short lengths of wrought iron bars mixed with charcoal in fire clay crucibles and collecting the molten iron into moulds, is known as
a) Cementation process
b) Crucible process
c) Bessemer process
d) Open hearth process.
51. The rocks in which argil (or clay) predominates, are called
a) sillicious rocks
b) argillaceous rocks
c) calcareous rocks
d) igneous rocks.
52. A badly mixed cement concrete results in
a) segregation
b) bleeding
c) honey combing
d) none to these.
53. Pick up the correct statement regarding low heat cement from the following:
a) It possesses less compressive strength
b) Its initial setting time is about one hour
c) Its mainly used for mass concrete work
d) All the above.
54. Chemically, marble is known as
a) metamorphic rock
b) argillaceous rock
c) calcareous rock
d) silicious rock.
55. Inner part of a timber log surrounding the pith, is called
a) sapwood
b) cambium layer
c) heart wood
d) none to these.
56. The filler used in plastic bitumen, is
a) shale powder
b) talc powder
c) asbestos powder
d) none of these.
57. Resins are
a) not soluble in water
b) soluble in spirit
c) used in varnishes
d) all the above.
58. Refractory bricks are used for
a) retaining walls
b) columns
c) piers
d) combustion chambers.
59. Expanded metal is
a) manufactured from steel sheets
b) used for reinforced concrete in road pavements
c) measured in term of SWM (shortway mesh) and LWM (long way mesh)
d) all the above.
60. The rock generally used for roofing, is
a) granite
b) basalt
c) slate
d) pumice.
61. Apiece of sawn timber whose cross-sectional dimensions exceed 5 cm, in one direction and 20 cm in the other direction, is called a
a) cant
b) deal
c) baulk
d) strip.
62. Quick lime (or caustic lime)
a) is obtained by the calcination of pure lime stone
b) has great affinity to moisture
c) is amorphous
d) All the above.
63. Pick up the correct statement from the following:
a) soft stones are required for carving
b) light stones are required for arches
c) hard stones are required to stand high pressure
d) All the above.
64. Name the type of cement from the following for canal linings :
a) sulphate resisting cement
b) rapid hardening cement
c) quick setting cement
d) pozzuolana cement.
65. Mastic asphalt is generally used for
a) damp proof course
b) water proof layer
c) partition walls
d) both (a) and (b).
66. Black marble is generally found in the district of
a) Jodhpur
b) Jaipur
c) Jabalpur
d) Jaisalmer
67. The most fire resistant paints are :
a) enamel paints
b) aluminium paints
c) asbestos paints
d) cement paints.
68. If P is the percentage of water required for normal consistency, water to be added for determination of initial setting time, is
a) 0.70 P
b) 0.75 P
c) 0.80 P
d) 0.85 P
69. A pug mill is used for
a) softening brick earth
b) moulding brick earth
c) tempering brick earth
d) all the above.
70. A good brick earth should contain :
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.
71. The commonly used lime in white washing, is
a) white lime
b) fat lime
c) hydraulic lime
d) lime
72. Shingle is
a) decomposed laterite
b) crushed granite
c) water bound pebbles
d) air weathered rock.
73. Pick up the plutonic rock from the following:
a) Granite
b) Dolerite
c) Basalt
d) All the above.
74. The lime which contains mainly calcium oxide and slacks with water, is
a) fat lime
b) quick lime
c) hydraulic lime
d) none of these.
75. Seasoning is
a) a process of removing sap
b) creosoting
c) painting with sodium silicate
d) coating with tar.
76. Inhaling of fly-ash over a long period causes
a) silicosis
b) fibrosis of lungs
c) bronchitis
d) All of these.
77. Minimum required water cement ratio for a workable concrete, is
a) 0.30
b) 0.40
c) 0.50
d) 0.60
78. Rocks formed due to alteration of original structure due to heat and excessive pressure are called
a) sedimentary rocks
b) igneous rocks
c) metamorphic rocks
d) none of these.
79. The compound of Portland cement which contributes to the strength after two to three years is
a) Tricalcium silicate
b) Di-calcium silicate
c) Tricalcium aluminate
d) Tetracalcium alumino ferrite.
80. For slaking of 10 kg of CaO, the theoretical amount of water is
a) 2.2 kg
b) 1.5 kg
c) 3.2 kg
d) None of these.
81. Pick up the correct statement from the following: Method of sawing timber
a) tangentially to annual rings, is known as tangential method.
b) in four quarters such that each board cuts annual rings at angles not less than 45°, is known as quarter sawing method.
c) cut out of quarter logs, parallel to the medullary rays and perpendicular to annual rings, is known as radial sawing.
d) all the above.
82. Clay and silt content in a good brick earth must be at least
a) 50%
b) 40%
c) 30%
d) 25%
83. Bessemer process is used for the manufacture of
a) Pig iron
b) cast iron
c) Wrought iron
d) Steel.
84. The portion of the brick without a triangular corner equal to half the width and half the length, is called
a) closer
b) queen closer
c) king closer
d) squint brick.
85. The standard size of masonry bricks, is
a) 18 cm x 8 cm x 8 cm
b) 19 cm x 9 cm x 9 cm
c) 21 cm x 11 cm x 11 cm
d) none of these.
86. Which one of the following is an air binding material ?
a) Gypsum
b) Acid-resistant cement
c) Quick lime
d) All of these.
87. A good quality stone absorbs water less than
a) 5%
b) 10%
c) 15%
d) 20%
88. Pick up the correct statement from the following:
a) Alexander Parkes, a Scottish chemist prepared a hard material by mixing camphor and alcohol with nitro cellulose and called it, as Parkesite
b) Dr. L. Bakeland, a Belgian scientist prepared a product known as Bakelite
c) Pollark, an Austrian scientist prepared a substance from urea and formaldehyde and called it Plastic
d) All the above.
89. Plywood is made from
a) common timber
b) bamboo fibre
c) teak wood only
d) asbestos sheets.
90. Soundness test of cement determines
a) quality of free lime
b) ultimate strength
c) durability
d) all the above.
91. The slag which floats on the surface of the molten iron generally contains
a) Lime (CaO) 45%
b) Silica (SiO2) 35%
c) Alumina (Al2O3 ) 12%
d) all the above.
92. Minimum of 40% of iron, is available in
a) Magnetite
b) Red haemetite
c) Limonite
d) Black band.
93. If the iron ore contains clay as an impurity, the flux added during calcination, is
a) clay
b) lime stone
c) argillaceous iron ore
d) all the above.
94. Cement is said to be of good quality if
a) its colour is not greenish grey
b) one feels cool by thrusting one's hand in the cement bag
c) handful of cement thrown into a bucket of water does not sink
d) none of these.
95. Cast steel is manufactured by
a) Cementation process
b) Crucible process
c) Bessemer process
d) Open hearth process.
96. For the manufacture of plywood, veneers are placed so that grains of adjacent veneers
a) run at right angles
b) parallel
c) inclined at 45°
d) inclined at 60°.
97. A 1st class brick immersed in water for 24 hours, should not absorb water (by weight) more than
a) 10%
b) 15%
c) 20%
d) 25%
98. The proportions of charcoal, saltpetre and sulphur in gun powder by weight, are respectively:
a) 15, 75, 10
b) 75, 10, 15
c) 10, 15, 75
d) 10, 75, 15.
99. Geologically, marble is known as
a) sedimentary rock
b) igneous rock
c) metamorphic rock
d) stratified rock.
100. The commonly used drying oil for oil paints, is
a) olive oil
b) linseed oil
c) kerosine oil
d) accetate of lead.
101. Initial setting of cement is caused due to
a) Tri-calcium silicate
b) Di-calcium silicate
c) Tri-calcium aluminate
d) Tetra calcium alumino ferrite.
102. The foliated structure is very common in
a) sedimentary rocks
b) igneous rocks
c) metamorphic rocks
d) none of these.
103. Turpentine oil is used in paints as
a) thinner
b) vehicle
c) base
d) drier.
104. The hardest rock is
a) marble
b) diamond
c) talc
d) quartz.
105. The silica is used for preparing
a) silica bricks
b) coke oven
c) lining for glass furnaces
d) all of these.
106. Wrought iron is manufactured from pig iron by
a) refining
b) puddling
c) shingling
d) all the above.
107. Pick up the correct statement from the following:
a) The phenol is either extracted from coal-tar or prepared from benzene
b) Phenol reacts with formaldehyde, to form phenol formaldehyde resin
c) The plastics prepared from phenol-formaldehyde are used for paints, varnishes, w.c. seats
d) All the above.
108. Fibre boards can be
a) distempered
b) painted
c) painted and distempered
d) used for furniture.
109. Pick up the correct statement from the following:
a) Catalysts are added to assist and accelerate the hardening of resin,
b) The fillers are inert materials and they impart strength and hardness
c) Fibrous fillers increase thermal resistance
d) All the above.
110. Portland pozzolana cement possesses
a) higher resistance to chemical attack
b) lower heat of hydration
c) lower shrinkage on drying
d) all the above.
111. Iron ore may contain
a) carbon
b) silicon
c) phosphorus and maganese
d) all the above.
112. Wrought iron is used for
a) structural works in beams
b) small sized water pipes
c) columns and struts
d) none to these.
113. The timber having maximum resistance against white ants, is obtained from
a) chir
b) shisham
c) sal
d) teak.
114. Knots in timber are
a) defects caused by crushing fibres
b) splits radiating from the centre
c) speckled strains
d) signs of branches cut off.
115. Pick up the correct statement from the following:
a) Solder material is an alloy which melts at a temperature above 400°C
b) Brazing is done at temperature above 600°C to 1100°C
c) Brazing joint is stronger than the solder joint
d) all the above.
116. Lime concrete is generally used for
a) wall foundations
b) flooring at ground level
c) both (a) and (b)
d) neither (a) nor (b).
117. Bituminous fells are used for
a) covering A.C. sheets
b) covering sloping roofs
c) D.P.C.
d) none to these.
118. The minimum compressive strength of Ilnd class bricks should be
a) 75 kg/cm2
b) 90 kg/cm2
c) 100 kg/cm2
d) 120 kg/cm2
119. Stuco paints are suitable for
a) stone masonry
b) brick walls
c) both (a) and (b)
d) neither (a) nor (b).
120. Pick up the correct statement from the following:
a) Corrugated sheet iron is made by passing plain sheets between grooved rollers
b) Strength and stiffness of corrugated sheets are considerably increased
c) Corrugated sheets are generally gal-venised to protect iron from corrosion by rust
d) all the above.
121. Quick setting cement is produced by adding
a) less amount of gypsum in very fine powdered form
b) more amount of gypsum in very fine powdered form
c) aluminium sulphate in very fine powdered form
d) none of these.
122. Duco is one of the patent forms of
a) emulsion paints
b) plastic paints
c) aluminium paints
d) cellulose paints.
123. Pick up the correct statement from the following:
a) The substance which consists of one primary chemical, is known as monomer
b) The polymer consists of thousands of monomers joined together
c) A polymetric material consists of a large number of long-chain molecules
d) All the above.
124. Bulking of sand is caused due to
a) surface moisture
b) air voids
c) viscosity
d) all the above.
125. The normal curing period for lime mortar, is:
a) one day
b) 3 days
c) 7 days
d) 10 days
126. The type of steel used for precision levelling staff, is
a) Titanium steel
b) Carbon steel
c) Invar
d) Stainless steel.
127. During pudding
a) molten metal is kept clear of the fuel
b) carbon is converted into carbonic acid gas
c) silicon forms a slag
d) all the above.
128. German silver is an alloy of
a) zinc, lead and nickel
b) silver, gold and lead
c) copper, nickel and zinc
d) copper, brass and zinc
129. Pick up the incorrect statement from the following:
a) Plastics are chemical resistant
b) Plastics are durable
c) Plastics are ductile
d) Plastics are excellent electric insulators.
130. Pick up correct statement from the following:
a) Fibre boards are used for thermal and acoustic control
b) Fibre boards are used for light weight standing members
c) Fibre boards are obtained by impregnating a resin product on fibres
d) all the above.
131. Quartzite, a metamorphic stone is
a) hard
b) brittle
c) crystalline
d) All the above.
132. Pick up the correct statement from the following:
a) Plastics have generally low melting point
b) The coefficient of thermal expansion of plastics is about three times than that of steel
c) The acoustical boards prepared by impregnating fibre-glass with phenolic resins has absorption coefficient of about 0.67
d) All the above.
133. Dextrin is
a) animal glue
b) starch glue
c) rubber based adhesive
d) none to these.
134. Formula for quick lime, is
a) CaCO3
b) CaO
c) CO3CO2
d) none to these.
135. For the manufacture of stainless steel, steel is mixed with
a) chromium
b) nickel
c) tungsten
d) none of these.
136. Stones used for ornamental work must be
a) soft
b) hard
c) light
d) heavy.
137. Pick up the correct statement from the following:
a) Quick lime is obtained by burning pure lime stone:
b) Hydraulic lime is obtained by burning lime stone containing clay 5% to 30%
c) Poor lime is obtained by burning lime stone containing impurities more than 5%
d) All the above.
138. The presence of original rounded surface on the manufactured piece of timber, is called
a) Wane
b) Torn grain
c) Diagonal grain
d) Chipmark.
139. Smith's test of stones is performed to find out
a) the presence of soluble matter of stone
b) the compressive strength of the stone
c) the hardness of the stone
d) the toughness of the stone.
140. The cracks caused by shrinkage of the exterior surface of the wood exposed to atmosphere, are called:
a) radial shakes
b) heart shakes
c) wind cracks
d) twisted fibres.
141. The process of decarbonising the pig iron completely and then adding proper percentage of carbon for manufacturing steel, is called
a) Cementation process
b) crucible process
c) Bessemer process
d) Open hearth process.
142. In paints, the pigment is responsible for
a) durability
b) colour
c) smoothness
d) none of these.
143. The operation of removal of impurities or clay adhering to iron ores, is known as
a) dressing
b) calcination
c) roasting
d) smelting.
144. If water required for 1 bag of cement is 30 litres, the water cement ratio is :
a) 0.40
b) 0.50
c) 0.60
d) None of these.
145. Portland cement manufactured from pure white chalk and clay but free from iron-oxide, is known as
a) quick setting cement
b) rapid hardening cement
c) white cement
d) low heat Portland cement.
146. Dry rot
a) cracks the timber
b) reduces the strength of timber
c) reduces the timber to powder
d) shrinks the timber
147. Which one of the following polymers is obtained from condensation polymerization?
a) phenol formaldehyde
b) carbamide
c) melamine-formaldehyde
d) all of these.
148. The weight of 1 m3 of brick earth, is about
a) 1200 kg
b) 1500 kg
c) 1800 kg
d) 2000 kg.
149. Pozzolana (or surkhi) is used in lime
a) to impart hydraulicity
b) to prevent shrinkage
c) to decrease the cost of construction
d) to decrease the setting time.
150. Mastic asphalt is normally used for
a) sound insulation
b) water proofing
c) fire proofing
d) none to these.
151. Lime stone is not a
a) sedimentary rock
b) stratified rock
c) aqueous rock
d) metamorphic rock.
152. The size of modular bricks, is
a) 10 x 10 x 9 cm
b) 19 x 9 x 9 cm
c) 22.5 x 10 x 8.5 cm
d) 22.5 x 8.0 x 9 cm.
153. A piece of timber whose thickness and width are respectively 5 cm and 10 cm is called
a) slate
b) plank
c) board
d) strip
154. Pig iron is manufactured from the ores by
a) dressing
b) calcination and roasting
c) smelting
d) all the above.
155. Quick lime
a) generates heat when added to water
b) reacts with carbon dioxide
c) may be used for white-washing
d) all the above.
156. Age of a tree may be ascertained by
a) radius of its stem
b) circumference of its stem
c) number of branches
d) number of annual rings.
157. The portion of a brick cut to form angles other than right angles in plan, is known as
a) queen closer
b) king closer
c) closer
d) squint brick.
158. Pick up the correct statement from the following:
a) Slaked lime contains calcium hydroxide
b) Quick lime contains calcium oxide
c) Slaked lime may be obtained from quick lime
d) All the above.
159. Plywood is obtained by gluing wooden sheets at
a) 100 to 150 N/cm2
b) 100 to 130°C
c) both (a) and (b)
d) Neither (a) nor (b).
160. The low voltage porcelain is mainly used for
a) switch block
b) insulating tubes
c) lamp sockets
d) All of these.
161. Putty is
a) made with finely powdered chalk and linseed oil
b) used for fixing glass panes
c) softened by a solution of pearl ash and quick-lime soaked in water
d) all the above.
162. The initial setting time of hydraulic lime, is
a) 30 minutes
b) 60 minutes
c) 90 minutes
d) 120 minutes
163. PVC stands for
a) plastic very compact
b) polythene vinyl chloride
c) polythene vinyl carbon
d) polythene vanadium carbide.
164. Generally wooden moulds are made from
a) ply wood
b) shisham wood
c) deodar wood
d) teak wood
165. Cement paints usually
a) contain hydrated lime
b) contain 5% to 10% colour pigments
c) are prepared with white cement
d) all the above.
166. The cement becomes unsound by the presence of excess
a) sulphur
b) magnesia
c) lime
d) All of these.
167. The kiln which may work throughout the year, is
a) Clamp
b) Bull's kiln
c) Hoffman's kiln
d) none of these.
168. The minimum compressive strength of 1st class bricks should be
a) 75 kg/cm2
b) 90 kg/cm2
c) 100 kg/cm2
d) 120 kg/cm2
169. A volatile substance added to a paint to make its application easy and smooth, is known as
a) base
b) solvent
c) vehicle
d) none to these.
170. The percentage of water for normal consistency, is
a) 5% to 15%
b) 10% to 25%
c) 15% to 25%
d) 25% to 35%.
171. Pick up the correct statement from the following:
a) The plywoods do not split or crack due to changes in atmosphere
b) The commercial plywoods are available upto 150 cm wide and upto 300 cm long
c) The plywoods possess uniform tensile strength in all directions
d) All the above.
172. The main ingredient of a good quality brick earth, is
a) magnesia
b) lime
c) silica
d) alumina.
173. Bitumen is generally obtained from
a) organic material
b) synthetic material
c) petroleum product
d) coal.
174. For one cubic metre of brick masonry, number of bricks required, is
a) 400
b) 425
c) 450
d) 500
175. The steel which contains fissures and cavities, is manufactured by
a) Cementation process
b) Crucible process
c) Bessemer process
d) Open hearth process.
176. Pick up the volcanic rock from the following:
a) Granite
b) Dolerite
c) Basalt
d) All the above.
177. In stone masonry, stones (stratified rocks) are so placed that the direction of pressure to the plane of bedding is
a) right angles
b) 45°
c) 60°
d) None of these.
178. The most durable varnish is
a) water varnish
b) spirit varnish
c) turpentine varnish
d) oil varnish
179. Softer variety of steel may be obtained by
a) Cementation process
b) crucible process
c) Bessemer process
d) Open hearth process.
180. Pick up the correct statement from the following:
a) The baked earth is called terra-cotta
b) The articles prepared from clay which is burnt at low temperature and cooled down slowly, are called earthen-ware
c) The articles prepared from refractory clays which as mixed with stone and crushed pottery, are called stone ware
d) All the above.
181. Calcination of iron ores is done
a) to remove moisture
b) to remove carbonic acid
c) by roasting in heaps
d) all the above.
182. Strength of cement concrete primarily depends upon
a) quality of water
b) quantity of aggregate
c) quantity of cement
d) water-cement ratio.
183. Rapid hardening cement contains
a) Tri-calcium silicate
b) Tri-calcium aluminate
c) Tetra-calcium alumino-ferrite
d) Dicalcium silicate.
184. Bitumen emulsion is
a) a liquid containing bitumen in suspension
b) a paint
c) used as anti-corrosive paint
d) all the above.
185. The cast iron when heated to red heat with powdered red haemetite in an oven for increasing its toughness, is converted to
a) grey cast iron
b) white cast iron
c) mottled cast iron
d) toughed cast iron.
186. Jhumb bricks are
a) under burnt
b) over burnt
c) kutcha
d) none of these.
187. Plastic bitumen is generally used for
a) road pavements
b) expansion joints
c) crack fillings
d) none to these.
188. Pick up the correct statement from the following:
a) Pick up the correct statement from the following:
b) The property of lime by which it sets or hardens in damp places having no free circulation of air is called setting
c) The product that remains after calcination of limestone, is called lime
d) All the above.
189. The commonly used thinner in oil paints, is
a) naptha
b) turpentine
c) both (a) and (b)
d) neither (a) nor (b)
190. Cast iron
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.
191. Asbestos is
a) corrugated sheet used for roofing
b) an incombustible fire proof material
c) an organic substance
d) all the above.
192. In a rock calcium carbonate predominates. State whether it is :
a) Sillicious rock
b) Argillaceous rock
c) Calcareous rock
d) None of these.
193. In order of increasing percentage of silica, the correct sequence is
a) sandy clay, calcareous clay, pure clay
b) calcareous clay, pure clay, sandy clay
c) pure clay, sandy clay, calcareous clay
d) None of these.
194. The rocks which are formed due to pouring of magma at the earth's surface are called
a) Plutonic rocks
b) Hypabyssal rocks
c) Volcanic rocks
d) Igneous rocks
195. Pick up the correct statement from the following:
a) Steel produced by open hearth process is milder than that obtained by the bessemer process
b) Engineers prefer open hearth steel for structural purpose as it is more homogenous
c) Basic Bessemer process is suitable for converting poor ore containing a large proportion of sulphur and phosphorus into steel
d) all the above.
196. Pick up the correct statement from the following:
a) The distinct plane of division along which a stone can easily be split, is called natural bed of stone
b) The natural bed of sedimentary rocks is along the planes of stratification
c) The natural bed of igneous rocks is not defined
d) All the above.
197. Invar contains
a) 12% of nickel
b) 24% of nickel
c) 30% to nickel
d) 36% of nickel.
198. Based on flow quality, the sequence of pipes is
a) A.C. pipes, G.I. pipes, C.I. pipes, PVC pipes
b) C.I. pipes, G.I. pipes, A.C. pipes, PVC pipes
c) C.I. pipes, G.I. pipes, PVC pipes, A.C. pipes
d) None of these.
a)
b)
c)
d)
