790+ Building Materials Solved MCQs

1.

Which of the following has more fire resisting characteristics?

A. Marble
B. Lime stone
C. Compact sand stone
D. Granite
Answer» C. Compact sand stone
2.

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
Answer» A. Plutonic rocks
3.

Plywood has the advantage of

A. Greater tensile strength in longer direction
B. Greater tensile strength in shorter direction
C. Same tensile strength in all directions
D. None of the above
Answer» C. Same tensile strength in all directions
4.

Due to attack of dry rot, the timber

A. Cracks
B. Shrinks
C. Reduces to powder
D. None of these
Answer» C. Reduces to powder
5.

Excess of alumina in brick earth makes the brick

A. Impermeable
B. Brittle and weak
C. To lose cohesion
D. To crack and warp on drying
Answer» D. To crack and warp on drying
6.

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
Answer» D. All the above
7.

The constituent of cement which is responsible for all the undesirable properties of cement is

A. Di-calcium silicate
B. Tri-calcium silicate
C. Tri-calcium aluminate
D. Tetra calcium alumino ferrite
Answer» C. Tri-calcium aluminate
8.

Inner part of a timber log surrounding the pitch, is called

A. Sapwood
B. Cambium layer
C. Heart wood
D. None to these
Answer» C. Heart wood
9.

For testing compressive and tensile strength of cement, the cement mortar is made by mixing cement and standard sand in the proportions of

A. 1 : 2
B. 1 : 3
C. 1 : 4
D. 1 : 6
Answer» B. 1 : 3
10.

If 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
Answer» D. 0.85 P
11.

The basic purpose of a retarder in concrete is

A. To increase the initial setting time of cement paste in concrete
B. To decrease the initial setting time of cement paste in concrete
C. To render the concrete more water tight
D. To improve the workability of concrete mix
Answer» A. To increase the initial setting time of cement paste in concrete
12.

Clay and silt content in a good brick earth must be at least

A. 50 %
B. 40 %
C. 30 %
D. 25 %
Answer» A. 50 %
13.

Which of the following is the purest form of iron?

A. Cast iron
B. Wrought iron
C. Mild steel
D. High carbon steel
Answer» B. Wrought iron
14.

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
Answer» B. Lime stone
15.

The stretcher bond in brick masonry can be used only when the thickness of wall is

A. 90 mm
B. 180 mm
C. 190 mm
D. 280 mm
Answer» A. 90 mm
16.

The plywood

A. Has good strength along the panel only
B. Can be spilt in the plane of the panel
C. Has greater impact resistance to blows than ordinary wood
D. Cannot be bent more easily than ordinary wood of same thickness
Answer» C. Has greater impact resistance to blows than ordinary wood
17.

Pick up the correct statement from the following:

A. The phenol is carbolic acid
B. The phenol is either extracted from coal-tar or prepared from benzene
C. Phenol reacts with formaldehyde, to form phenol formaldehyde resin
D. All the above
Answer» D. All the above
18.

Advantage of a clamp compared to a kiln for burning bricks is that

A. It takes less time for burning
B. It gives more output of first class bricks
C. It has less initial cost
D. It is suitable when bricks are required in large numbers
Answer» C. It has less initial cost
19.

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
Answer» D. All the above
20.

Assertion A : Pure lime takes a long time to develop adequate strength. Reason R : Pure lime has slow hardening characteristics. Select your answer according to the coding system given below:

A. Both A and R is true and R is correct explanation of A
B. Both A and R is true and R is not a correct explanation of A
C. A is true but R is false
D. A is false but R is true
Answer» A. Both A and R is true and R is correct explanation of A
21.

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
Answer» D. All the above
22.

Early attainment of strength in rapid hardening cement is mainly due to

A. Gypsum
B. Finer grinding
C. Tri-calcium silicate
D. Tri-calcium aluminate
Answer» B. Finer grinding
23.

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
Answer» D. All the above
24.

Which of the following cements contains maximum percentage of dicalcium silicate?

A. Ordinary Portland cement
B. Low heat cement
C. Rapid hardening cement
D. Sulphate resisting cement
Answer» B. Low heat cement
25.

Pick up the incorrect statement from the following:

A. Hydraulic lime is generally obtained by burning kankar
B. Hydraulic lime sets slowly as compared to fat lime
C. Hydraulic lime is generally used in lime mortar
D. None of these
Answer» D. None of these
26.

Which of the following stresses is used for identifying the quality of structural steel?

A. Ultimate stress
B. Yield stress
C. Proof stress
D. None of the above
Answer» B. Yield stress
27.

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
Answer» D. All the above
28.

Assertion A : Normally turpentine oil is recommended as thinner for indoor painting. Reason R : Turpentine oil is costlier than other thinners. Select your answer according to the coding system given below:

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
Answer» B. Both A and R is true but R is not the correct explanation of A
29.

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
Answer» D. All the above
30.

A mortar joint in masonry which is normal to the face of wall is known as

A. Bed joint
B. Wall joint
C. Cross joint
D. Bonded joint
Answer» C. Cross joint
31.

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
Answer» B. Solvent
32.

Jumper is a tool used for

A. Testing of stones
B. Quarrying of stones
C. Dressing of stones
D. None of the above
Answer» B. Quarrying of stones
33.

Pick up the volcanic rock from the following:

A. Granite
B. Dolerite
C. Basalt
D. All the above
Answer» C. Basalt
34.

Sapwood consists of

A. Innermost annular rings around the pith
B. Portion of timber between heartwood and cambium layer
C. Thin layers below the bark
D. Thin fibre which extends from the pith outwards and holds the annular rings together
Answer» B. Portion of timber between heartwood and cambium layer
35.

Strength of cement concrete primarily depends upon

A. Quality of water
B. Quantity of aggregate
C. Quantity of cement
D. Water-cement ratio
Answer» D. Water-cement ratio
36.

The main function of alumina in brick earth is

A. To impart plasticity
B. To make the brick durable
C. To prevent shrinkage
D. To make the brick impermeable
Answer» A. To impart plasticity
37.

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
Answer» D. All the above
38.

Which of the following pairs gives a correct combination of the useful and harmful constituents respectively of a good brick earth?

A. Lime stone and alumina
B. Silica and alkalies
C. Alumina and iron
D. Alkalies and magnesium
Answer» B. Silica and alkalies
39.

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
Answer» D. All the above
40.

Hydraulic lime is obtained by

A. Burning of lime stone
B. Burning of kankar
C. Adding water to quick lime
D. Calcination of pure clay
Answer» B. Burning of kankar
41.

Oil varnish generally consists of

A. Synthetic resin and spirit
B. Oil, wax and resin
C. Resin, oil and turpentine
D. Spirit, oil and wax
Answer» C. Resin, oil and turpentine
42.

For testing compressive strength of cement, the size of cube used is

A. 50 mm
B. 70.6 mm
C. 100 mm
D. 150 mm
Answer» B. 70.6 mm
43.

When a brick is immersed in water for 24 hours and then dried, if

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
Answer» D. All the above
44.

For sanitary pipes and chemical stonewares,

A. Salt glazing is used
B. Lead glazing is used
C. Opaque glazing is used
D. None of these
Answer» A. Salt glazing is used
45.

The most commonly used retarder in cement is

A. Gypsum
B. Calcium chloride
C. Calcium carbonate
D. None of the above
Answer» A. Gypsum
46.

The rocks which are formed due to cooling of magma at a relatively shallow depth from the earth's surface are called

A. Plutonic rocks
B. Hypabyssal rocks
C. Volcanic rocks
D. Igneous rocks
Answer» B. Hypabyssal rocks
47.

The ratio of the thickness of web to that of flange of steel rolled structural beams and channels is

A. Less than 1
B. Equal to 1
C. Greater than 1
D. Less than 1 in beams but greater than 1 in channels
Answer» A. Less than 1
48.

Non acid-resistant asbestos is:

A. Tremolite asbestos
B. Chrysotile asbestos
C. Amosite asbestos
D. None of these
Answer» B. Chrysotile asbestos
49.

The pressure acting on the stones in stone masonry construction should be

A. Along the direction of bedding planes
B. At 45° to the direction of bedding planes
C. At 60° to the direction of bedding planes
D. Perpendicular to the direction of bedding planes
Answer» D. Perpendicular to the direction of bedding planes
50.

Pick up the constituent of good brick earth whose excess causes the raw bricks shrink and warp during drying and burning, from the following:

A. Alumina
B. Lime
C. Iron-oxide
D. Magnesia
Answer» A. Alumina
51.

The type of bond provided in brick masonry for carrying heavy loads is

A. Single Flemish bond
B. Double Flemish bond
C. English bond
D. Zigzag bond
Answer» C. English bond
52.

Blister steel

A. Is obtained by cementation process
B. Is full of fissures and cavities
C. Can be easily welded
D. All the above
Answer» D. All the above
53.

Gypsum is a

A. Mechanically formed sedimentary rock
B. Igneous rock
C. Chemically precipitated sedimentary rock
D. Metamorphic rock
Answer» C. Chemically precipitated sedimentary rock
54.

Seasoning of timber is done

A. To make it water proof
B. To paint its surface
C. To increase its temperature
D. To remove water
Answer» D. To remove water
55.

Which of the following is a rock?

A. Quartz
B. Mica
C. Gypsum
D. None of the above
Answer» C. Gypsum
56.

The tendency of a stone is, to split along:

A. Texture
B. Fracture
C. Cleavage
D. Structure
Answer» C. Cleavage
57.

Which of the following stone is best suited for construction of piers and abutments of a railway bridge?

A. Granite
B. Sand stone
C. Lime stone
D. Quartzite
Answer» A. Granite
58.

Cast iron contains carbon approximately

A. 1.5% to 5.5%
B. 0.05% to 1.75%
C. 0.250 %
D. None to these
Answer» A. 1.5% to 5.5%
59.

Which of the following trees yields hard wood?

A. Deodar
B. Chir
C. Shishum
D. Pine
Answer» C. Shishum
60.

Soundness of cement is tested by

A. Vicat's apparatus
B. Le-chatelier apparatus
C. Compressive strength testing apparatus
D. None of these
Answer» B. Le-chatelier apparatus
61.

First class timber has an average life of

A. Less than one year
B. 1 to 5 years
C. 5 to 10 years
D. More than 10 years
Answer» D. More than 10 years
62.

Bitumen may be dissolved in

A. Carbondioxide
B. Water
C. Sodium chloride
D. Carbon disulphide
Answer» D. Carbon disulphide
63.

Which of the following ingredients of the brick earth enables the brick to retain its shape?

A. Alumina
B. Silica
C. Iron
D. Magnesia
Answer» B. Silica
64.

Veneering means

A. Carving out designs on timber planks
B. Chemically treating timber planks
C. Thick layer of superior wood glued to inferior wood
D. Thin layer of superior wood glued to inferior wood
Answer» C. Thick layer of superior wood glued to inferior wood
65.

Number of bricks required for one cubic metre of brick masonry is

A. 400
B. 450
C. 500
D. 550
Answer» C. 500
66.

Which one of the following is used for preparing porcelain?

A. Clay
B. Feldspar
C. Quartz
D. All of these
Answer» D. All of these
67.

The main ingredients of Portland cement are

A. Lime and silica
B. Lime and alumina
C. Silica and alumina
D. Lime and iron
Answer» A. Lime and silica
68.

Pick up the correct statement from the following:

A. Blistering may be cured by applying water paint finished with oil paint dried with a little copal varnish
B. Cracked paints may be cured by removing paint and giving a fresh coat of paint
C. Crawling paints may be cured by sand preparing the surface and giving a fresh coat with plenty of turps
D. All the above
Answer» D. All the above
69.

After storage, the strength of cement

A. Decreases
B. Increases
C. Remains same
D. May increase or decrease
Answer» A. Decreases
70.

A bull nose brick is not used for

A. Rounding off sharp corners
B. Pillars
C. Decoration purpose
D. Arches
Answer» D. Arches
71.

The most common admixture which is used to accelerate the initial set of concrete is

A. Gypsum
B. Calcium chloride
C. Calcium carbonate
D. None of the above
Answer» B. Calcium chloride
72.

Chlorite, a green colour mineral is mainly derived from the decomposition of

A. Augite
B. Biotite
C. Hornblende
D. All of these
Answer» A. Augite
73.

The ultimate tensile strength of structural mild steel is about

A. 160 N/mm²
B. 260 N/mm²
C. 420 N/mm²
D. 520 N/mm²
Answer» C. 420 N/mm²
74.

Asbestos

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
Answer» D. All the above
75.

A queen closer is a

A. Brick laid with its length parallel to the face or direction of wall
B. Brick laid with its breadth parallel to the face or direction of wall
C. Brick having the same length and depth as the other bricks but half the breadth
D. Brick with half the width at one end and full width at the other
Answer» C. Brick having the same length and depth as the other bricks but half the breadth
76.

The percentage of alumina and silica in good fire clay vary respectively is

A. 25, 75
B. 30, 70
C. 35, 65
D. All of these
Answer» A. 25, 75
77.

The proportions of lime and sand in the mortar normally used in brick construction are

A. 1 : 2
B. 1 : 4
C. 1 : 6
D. 1 : 8
Answer» A. 1 : 2
78.

Index number expressing the relative sizes of both coarse and fine aggregates, is called

A. Proportioning of aggregates
B. Fineness modulus
C. Grading of aggregates
D. None of these
Answer» B. Fineness modulus
79.

Which of the following sedimentary rocks changes into quartzite by metamorphic action?

A. Sand stone
B. Lime stone
C. Shale
D. Gypsum
Answer» A. Sand stone
80.

Lime putty

A. Is made from hydraulic lime
B. Is made by adding lime to water
C. Can be used only upto three days
D. All of above
Answer» D. All of above
81.

The stone suitable for rubble masonry should be.

A. Hard
B. Tough
C. Heavy
D. Light
Answer» A. Hard
82.

Pick up the correct statement from the following:

A. Air bubbles in casting produce a dull sound by tapping their surfaces lightly with a hammer
B. Cupola furnace is used for the manufacture of cast iron
C. Red short iron is of no value for welding purpose
D. All the above
Answer» D. All the above
83.

Spalling hammer is used for

A. Driving wooden headed chisels
B. Rough dressing of stones
C. Carving of stones
D. Breaking small projection of stones
Answer» B. Rough dressing of stones
84.

Bullet proof glass is made of thick glass sheet sandwiched by a layer of

A. Steel
B. Stainless steel
C. High test plastic
D. Chromium plate
Answer» C. High test plastic
85.

Plywood is made by bonding together thin layers of wood in such a way that the angle between grains of any layer to grains of adjacent layers is

A.
B. 30°
C. 45°
D. 90°
Answer» D. 90°
86.

According to IS 399-1963, the weight of the timber is specified at

A. 8% moisture content
B. 10% moisture content
C. 12% moisture content
D. 14% moisture content
Answer» C. 12% moisture content
87.

The internal size of mould used in brick preparation is

A. Equal to the size of a fully burnt brick
B. Smaller than the size of a fully burnt brick
C. Greater than the size of a fully burnt brick
D. None of the above
Answer» C. Greater than the size of a fully burnt brick
88.

Pick up the correct statement from the following:

A. The free quartz suddenly expands at a temperature lower than 600°C
B. The lime stone resists fire upto about 800°C and at higher temperature it splits into CaO and CO2
C. The sand stone with silicates resist a fire in a better way
D. All the above
Answer» D. All the above
89.

Quick lime is

A. Calcium carbonate
B. Calcium oxide
C. Calcium hydroxide
D. None of the above
Answer» B. Calcium oxide
90.

Pick up the correct statement from the following:

A. Styrene resin is produced from ethylene which is made from petroleum
B. Styrene resin is light in weight
C. Styrene resin transmits ultraviolet waves of light
D. All the above
Answer» D. All the above
91.

The initial setting time for ordinary Portland cement as per IS specifications should not be less than

A. 10 minutes
B. 30 minutes
C. 60 minutes
D. 600 minutes
Answer» B. 30 minutes
92.

Rapid hardening cement attains early strength due to

A. Larger proportion of lime grounded finer than normal cement
B. Lesser proportion of lime grounded coarser than normal cement
C. Lesser proportion of lime grounded finer than normal cement
D. Excess percentage of gypsum
Answer» A. Larger proportion of lime grounded finer than normal cement
93.

With increase in moisture content, the bulking of sand

A. Increases
B. Decreases
C. First increases to a certain maximum value and then decreases
D. First decreases to a certain minimum value and then increases
Answer» C. First increases to a certain maximum value and then decreases
94.

Plywood is normally available

A. 1 mm thick
B. 2 mm thick
C. 2 to 3 mm thick
D. 3 mm to 4 mm thick
Answer» D. 3 mm to 4 mm thick
95.

Compared to mild steel, cast iron has
(i) High compressive strength
(ii) High tensile strength
(iii) Low compressive strength
(iv) Low tensile strength
The correct answer is

A. (i) and (ii)
B. (ii) and (iii)
C. (iii) and (iv)
D. (i) and (iv)
Answer» D. (i) and (iv)
96.

In a mortar, the binding material is

A. Cement
B. Sand
C. Surkhi
D. Cinder
Answer» A. Cement
97.

The vehicle used in case of enamel paints is usually

A. Linseed oil
B. Water
C. Varnish
D. None of the above
Answer» C. Varnish
98.

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 of the above
Answer» D. All of the above
99.

The slenderness ratio for masonry walls should not be more than

A. 10
B. 20
C. 30
D. 40
Answer» B. 20
100.

Sand stone is

A. Sedimentary rock
B. Metamorphic rock
C. Igneous rock
D. Volcanic rock
Answer» A. Sedimentary rock
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