Essential Objective Questions On Building Materials & Construction For Competitive Scoring
1.Spalling hammer is used for
driving wooden headed chisels
rough dressing of stones
carving of stones
breaking small projection of stones
ANSWER : : rough dressing of stones
2.Sapwood consists of
innermost annular rings around the pith
portion of timber between heartwood and cambium layer
thin layers below the bark
thin fibre which extends from the pith outwards and holds the annular rings together
ANSWER : : portion of timber between heartwood and cambium layer
3.Quartitze is a
silicious rock
argillaceous rock
calcareous rock
aqueous rock
ANSWER : : silicious rock
4.Crushing strength of a good building stone should be more than
50 MPa
100 MPa
150 MPa
200 MPa
ANSWER : : 100 MPa
5.Which of the following represents a metamorphic rock? i) slate ii) shale iii) quartzite The correct answer is
only (iii)
both (i) and (iii)
both (ii) and (iii)
all (i), (ii) and (iii)
ANSWER : : both (i) and (iii)
6.Which of the following sedimentary rocks changes into quartzite by metamorphic action ?
sand stone
lime stone
shale
gypsum
ANSWER : : sand stone
7.Based on the following rocks and minerals, select the correct statement, quartz, shale, basalt, granite, marble, gypsum, mica
basalt and marble are the only metamorphic rocks
there is no sedimentary rock
granite is the only igneous rock
quartz and mica are minerals
ANSWER : : quartz and mica are minerals
8.Granite is not suitable for ordinary building purpose because
it can not be polished
it is not a fire proof material
it is costly
it has less crushing strength
ANSWER : : it is costly
9.The preparation of surface of stone to obtain plain edges or to obtain stones of required size and shape is known as
quarrying of stones
blasting of stones
seasoning of stones
dressing of stones
ANSWER : : dressing of stones
10.Which of the following is a mineral ?
basalt
granite
quartz
syenite
ANSWER : : quartz
11.Which of the following has more fire resisting characteristics ?
marble
lime stone
compact sand stone
granite
ANSWER : : compact sand stone
12.The predominant constituent which is responsible for strength in granite is
quartz
felspar
mica
none of the above
ANSWER : : quartz
13.Which of the following stone is best suited for construction of piers and abutments of a railway bridge ?
granite
sand stone
lime stone
quartzite
ANSWER : : granite
14.The stone suitable for rubble masonry should be.
hard
tough
heavy
light
ANSWER : : hard
15.The important test to be conducted on a stone used in docks and harbours is-
hardness test
workability test
weight test
toughness test
ANSWER : : weight test
16.Cross cut saw is used for
cutting soft stones
cutting hard stones
cutting large blocks of stones
dressing stones
ANSWER : s: b
17.Specific gravity for most of the building stones lies between
1.5 to 2.0
2.0 to 2.5
2.5 to 3.0
3.0 to 3.5
ANSWER : : 2.5 to 3.0
18.Sandstone is a i) sedimentary rock ii) aqueous rock iii) silicious rock The correct answer is
only (i)
both (i) and (ii)
both (i) and (iii)
all (i), (ii) and (iii)
ANSWER : : all (i), (ii) and (iii)
19.Slate is formed by metamorphic action on
shale
lime stone
sand stone
granite
ANSWER : : shale
20.A good building stone should not absorb water more than
5%
10%
15%
20%
ANSWER : : 5%
21.A heavy stone is suitable for
arches
rubble masonry
roads
retaining walls
ANSWER : : retaining walls
22.Which of the following metamorphic rocks has the most weather resisting characteristics?
marble
quartzite
slate
lime stone
ANSWER : : quartzite
23.Which of the following is a rock ?
quartz
mica
gypsum
none of the above
ANSWER : : gypsum
24.Which of the following trees yields hard wood ?
deodar
chir
shishum
pine
ANSWER : : shishum
25.Jumper is a tool used for
testing of stones
quarrying of stones
dressing of stones
none of the above
ANSWER : : quarrying of stones
26.The process of mixing clay, water and other ingredients to make brick is known as
kneading
moulding
pugging
drying
ANSWER : : kneading
27.The moisture content in a well seasoned timber is
4% to 6%
10% to 12%
15% to 20%
100%
ANSWER : : 10% to 12%
28.The nominal size of the modular brick is
190 mm x 90mmx 80 mm
190 mm x 190 mm x 90 mm
200 mm x 100 mm x 100 mm
200 mm x 200 mm x 100 mm
ANSWER : : 200 mm x 100 mm x 100 mm
29.In which of the following directions, the strength of timber is maximum ?
parallel to grains
45� to grains
perpendicular to grains
same in all directions
ANSWER : : parallel to grains
30.The trunk of tree left after cutting all the branches is known as
log
batten
plank
baulk
ANSWER : : log
31.The disease of dry rot in timber is caused by
lack of ventilation
alternate wet and dry conditions
complete submergence in water
none of the above
ANSWER : : lack of ventilation
32.The plywood
has good strength along the panel only
can be spilt in the plane of the panel
has greater impact resistance to blows than ordinary wood
cannot be bent more easily than ordinary wood of same thickness
ANSWER : : has greater impact resistance to blows than ordinary wood
33.A first class brick when immersed in cold water for 24 hours should not absorb water more than
15%
20%
22%
25%
ANSWER : : 20%
34.The practical limit of moisture content achieved in air drying of timber is
5%
15%
25%
35%
ANSWER : : 15%
35.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
0�
30�
45�
90�
ANSWER : s: d
36.Plywood has the advantage of’
greater tensile strength in longer direction
greater tensile strength in shorter direction
same tensile strength in all directions
none of the above
ANSWER : : same tensile strength in all directions
37.Advantage of a clamp compared to a kiln for burning bricks is that
it takes less time for burning
it gives more output of first class bricks
it has less initial cost
it is suitable when bricks are required in large numbers
ANSWER : : it has less initial cost
38.The percentage of alumina in a good brick earth lies between
5 to 10%
20 to 30%
50 to 60%
70 to 80%
ANSWER : : 20 to 30%
39.Excess of silica in brick earth results in
cracking and warping of bricks
loss of cohesion
enhancing the impermeability of bricks
none of the above
ANSWER : : loss of cohesion
40.Which of the following timbers is suitable for making sports goods ?
mulberry
mahogany
sal
deodar
ANSWER : : mulberry
41.The main function of alumina in brick earth is
to impart plasticity
to make the brick durable
to prevent shrinkage
to make the brick impermeable
ANSWER : : to impart plasticity
42.Crushing strength of a first class brick should not be less than
3.5 N/mm2
7.0 N/mm2
10.5 N/mm2
14.0 N/mm2
ANSWER : : 10.5 N/mm2
43.In which of the following pairs both trees yield soft wood?
deodar and shishum
chir and sal
sal and teak
chir and deodar
ANSWER : : chir and deodar
44.Which of the following pairs gives a correct combination of the useful and harmful constituents respectively of a good brick earth ?
lime stone and alumina
silica and alkalies
alumina and iron
alkalies and magnesium
ANSWER : : silica and alkalies
45.First class timber has an average life of
less than one year
1 to 5 years
5 to 10 years
more than 10 years
ANSWER : : more than 10 years
46.Which of the following ingredients of the brick earth enables the brick to retain its shape ?
alumina
silica
iron
magnesia
ANSWER : : silica
47.The age of a tree can be known by examining
cambium layer
annular rings
medullary rays
heart wood
ANSWER : : annular rings
48.Percentage of silica in a good brick earth lies between
5 to 10%
20 to 30%
50 to 60%
70 to 80%
ANSWER : : 50 to 60%
49.Assertion A : Shishum is used for decorative woodwork. Reason R : Shishum can be polished to an excellent finish. Select your answer according to the coding system given below :
Both A and R are true and R is the correct explanation of A
Both A and R are true but R is not the correct explanation of A
A is true but R is false
A is false but R is true
ANSWER : : Both A and R are true and R is the correct explanation of A
50.Excess of alumina in brick earth makes the brick
impermeable
brittle and weak
to lose cohesion
to crack and warp on drying
ANSWER : : to crack and warp on drying
51.The main ingredients of Portland cement are
lime and silica
lime and alumina
silica and alumina
lime and iron
ANSWER : : lime and silica
52.Early attainment of strength in rapid hardening cement is mainly due to
gypsum
finer grinding
tricalcium silicate
tricalcium aluminate
ANSWER : : finer grinding
53.The initial setting time for ordinary Portland cement as per IS specifications should not be less than
10 minutes
30 minutes
60 minutes
600 minutes
ANSWER : : 30 minutes
54.The constituent of cement which is responsible for all the undesirable properties of cement is
dicalcium silicate
tricalcium silicate
tricalcium aluminate
tetra calcium alumino ferrite
ANSWER : : tricalcium aluminate
55.Study the following statements. i) Hydraulic lime is suitable for white washing, ii) Fat lime is suitable for whitewashing, iii) Hydraulic lime is suitable for making mortar, iv) Fat lime is suitable for making mortar. The correct answer is
(i) and (iv)
(ii) and (iii)
(i) and (ii)
(iii) and (iv)
ANSWER : : (ii) and (iii)
56.Glazing is used to make earthenware
hard
soft
porous
impervious
ANSWER : : impervious
57.Addition of pozzolana to ordinary Portland cement increases
bleeding
shrinkage
permeability
heat of hydration
ANSWER : : shrinkage
58.Le Chatelier’s device is used for determining the
setting time of cement
soundness of cement
tensile strength of cement
compressive strength of cement
ANSWER : : soundness of cement
59.Pug mill is used for
preparation of clay
moulding of clay
drying of bricks
burning of bricks
ANSWER : : preparation of clay
60.According to IS specifications, the compressive strength of ordinary portland cement after three days should not be less than
7 MPa
11.5 MPa
16 MPa
21 MPa
ANSWER : : 16 MPa
61.For testing compressive strength of cement, the size of cube used is
50 mm
70.6 mm
100 mm
150 mm
ANSWER : s: a
62.The main constituent which imparts hydraulicity to hydraulic lime is
calcium oxide
silica
clay
water
ANSWER : : clay
63.Gypsum consists of
H2S and C02
CaS04 and H20
Lime and H20
C02 and calcium
ANSWER : : CaS04 and H20
64.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 :
Both A and R are true and R is correct explanation of A.
Both A and R are true and R is not a correct explanation of A.
A is true but R is false.
A is false but R is true.
ANSWER : : Both A and R are true and R is correct explanation of A.
65.The main constituent of cement which is responsible for initial setting of cement is
dicalcium silicate
tricalcium silicate
tricalcium aluminate
all of the above
ANSWER : : tricalcium aluminate
66.The slump recommended for mass concrete is about
25 mm to 50 mm
50 mm to 100 mm
100 mm to 125 mm
125 mm to 150 mm
ANSWER : : 25 mm to 50 mm
67.Number of bricks required for one cubic metre of brick masonry is
400
450
500
550
ANSWER : : 500
68.Which of the following bricks are used for lining of furnaces ?
overburnt bricks
underburnt bricks
refractory bricks
first class bricks
ANSWER : : refractory bricks
69.For testing compressive and tensile strength of cement, the cement mortar is made by mixing cement and standard sand in the proportions of
1:2
1:3
1:4
1:6
ANSWER : s: b
70.As per IS specifications, the maximum final setting time for ordinary Portland cement should be
30 minutes
1 hour
6 hours
10 hours
ANSWER : : 10 hours