Multiple Questions along with Answer:
If you appear for an interview in MNC company, they conduct a written test as well as personal interview. In Written test you will be asked so many short types of questions and answer and objectives types of question also. So, here I present you some of the important multiple objective questions and answers. Read the following for your kind information before you go to interview and for short question and answer type please visit my YouTube channel links in my homepage menu bar and SUBSCRIBE YouTube channel to get Practical Site/field Works:
Select the incorrect statement
[ A ] R.C.C has better fire resistance than
steel
[ B ] R.C.C. structure is economical than
steel structure
[ C ] Strength of concrete decreases as age
increases
[ D ] R.C.C can be used for under water and
marine structures
Answer : C
3 Water cement ratio is the ratio of
[ A ] Water to cement by weight
[ B ] Water to cement by volume
[ C ] Cement to water by weight
[ D ] Cement to water by volume
Answer : A
4 Concrete is
[ A ] Weak in tension
[ B ] Strong in tension
[ C ] Strong in both tension and compression
[ D ] Weak in compression
Answer : A
5 The entrained air in concrete
[ A ] Increases the strength
[ B ] Decreases the resistance to weathering
[ C ] Increases the workability
[ D ] Decreases the workability
Answer : C
6 Concrete is unsuitable for compaction
by vibration if it is
[ A ] Semi – plastic
[ B ] Plastic
[ C ] Earth moist
[ D ] Dry
Answer : B
7 The strength and quality of concrete
depends upon
(i)Grading of aggregates
(ii)Shape of aggregates
(iii)Surface area of aggregates
(iv)Surface texture of aggregates
[ A ] i, ii and iv
[ B ] ii, iii and iv
[ C ] i, iii and iv
[ D ] i, ii, iii and iv
Answer : D
8 In order to avoid segregation, fresh
concrete should be dropped from a height of
[ A ] Less than one meter
[ B ] Less than two metres
[ C ] More than one metre
[ D ] More than two metres
Answer : A
9 The process of hardening of concrete in
the presence of water is called
[ A ] Creep
[ B ] Hydration
[ C ] Shrinkage
[ D ] Curing
Answer : B
10 The process of keeping the concrete
structure moist is called
[ A ] Hydration
[ B ] Curing
[ C ] Creep
[ D ] Shrinkage
Answer : B
11 The separation of water or water
cement mixture from the freshly laid concrete
is known as
[ A ] Workability
[ B ] Segregation
[ C ] Bleeding
[ D ] Creep
Answer : C
12 The continuous strain, which the
concrete undergoes due to application of
external loads is
called
[ A ] Creep
[ B ] Bleeding
[ C ] Workability
[ D ] Segregation
Answer : A
13 The process of conversion of plastic
concrete to solid stage is called
[ A ] Hydration
[ B ] Hardening
[ C ] Setting
[ D ] Curing
Answer : C
14 At 28 days of curing concrete attains a
strength of
[ A ] 20 to 25%
[ B ] 60 to 70%
[ C ] 65 to 80%
[ D ] 90 to 95%
Answer : D
15 In a mass concrete, the aggregates
occupy a space of
[ A ] 25%
[ B ] 75%
[ C ] 40%
[ D ] 60%
Answer : B
16 The coarse aggregate which possess
the property of good interlocking are
[ A ] rounded shape
[ B ] elongated shape
[ C ] angular shape
[ D ] none of the above
Answer : C
17 While placing of concrete the thickness
of each layer for R.C.C. is
[ A ] 150 to 300 mm
[ B ] 450 mm
[ C ] 500 to 750 mm
[ D ] 500 mm
Answer : A
18 Increase in water content in a cement
concrete
(i) Increases workability
(ii) Increases the strength
[ A ] i
[ B ] ii
[ C ] both (i) and (ii)
[ D ] neither (i) nor (ii)
Answer : A
19 Slump cone test is used to
determine
[ A ] Shrinkage of concrete mix
[ B ] Creep of concrete
[ C ] Workability of concrete mix
[ D ] Soundness of concrete
Answer : C
20 While determining the workability of
concrete mix, the compaction factor test is
——than the
slump cone test
[ A ] Less accurate
[ B ] More accurate
[ C ] Approximate method
[ D ] None of the above
Answer : B
21 Workability of concrete mix with low
water cement ratio is determined by
[ A ] Tensile strength test
[ B ] Slump cone test
[ C ] Compaction factor test
[ D ] Flexural strength test
Answer : C
22 If the slump of a concrete mix is 50 to
100 mm, its workability is
[ A ] Very low
[ B ] Low
[ C ] Medium
[ D ] High
Answer : C
23 A compaction factor of 0.75 indicates
________workability
[ A ] Very low
[ B ] Low
[ C ] Medium
[ D ] High
Answer : A
24 Shrinkage in concrete can be reduced
by using
(i) Low water cement ratio (ii) More amount of
cement in the concrete
(iii) Presaturated aggregates
[ A ] i
[ B ] i and ii
[ C ] i and iii
[ D ] i, ii and iii
Answer : C
25 The process of proper and accurate
measurement of concrete ingredients for
uniformity of
proportion, is known as
[ A ] Curing
[ B ] Mixing
[ C ] Grading
[ D ] Batching
Answer : D
26 Select incorrect statement from the
following
[ A ] With passage of time, the strength of
cement decreases
[ B ] With passage of time, the strength of
cement increases
[ C ] After a period of 24 months, the
strength of cement reduces to 50%
[ D ] The concrete made with storage
deteriorated cement; gains strength with
time.
Answer : B
27 For compacting plain concrete road
surface of thickness less than 20 cm, the
following
vibrator is used.
[ A ] Internal vibrator
[ B ] Screed vibrator
[ C ] Form vibrator
[ D ] None of the above
Answer : B
28 Slump test of concrete is a measure of
its
[ A ] Consistency
[ B ] Compressive strength
[ C ] Tensile strength
[ D ] Impact value
Answer : A
29 Concrete gains strength due to
[ A ] Chemical reaction of cement with sand
and coarse aggregates
[ B ] Evaporation of water from concrete
[ C ] Hydration of cement
[ D ] All the above
Answer : C
30 Minimum grade of concrete for R.C.C.
should be _________ , as per IS.
456-2000
[ A ] M10
[ B ] M14
[ C ] M20
[ D ] M25
Answer : C
31 A concrete mass containing 5% of
voids
[ A ] Increases its strength by 30%
[ B ] Reduces its strength by 30%
[ C ] Increases its strength by 5%
[ D ] Reduces its strength by 5%
Answer : B
32 Workability of a concrete – mix is
determined by
(i)Slump cone test
(ii)Compaction factor test
(iii)Vee bee test
[ A ] i
[ B ] ii
[ C ] i and ii
[ D ] i, ii and iii
Answer : D
33 High strength of concrete requires a
water cement ratio of
[ A ] 0.10 to 0.15
[ B ] 0.25 to 0.30
[ C ] 0.45 to 0.60
[ D ] 0.75 to 0.90
Answer : B
34 One bag of cement is equivalent
to
[ A ] 50 litres
[ B ] 35 litres
[ C ] 28 litres
[ D ] 14 litres
Answer : B
35 One cubit metre of cement
weights
[ A ] 1000 kg
[ B ] 1200 kg
[ C ] 1440 kg
[ D ] 1600 kg
Answer : C
36 As per IS: 456-2000, modulus of
elasticity of concrete (in N/mm2) is given
by
[ A ] 5700 vfCK
[ B ] 5000 vfCK
[ C ] 3700 vfCK
[ D ] 3000 vfCK
Answer : B
37 In working stress method of design,
the factor of safety for concrete and steel
respectively
are
[ A ] 3.0 and 1.8
[ B ] 3.0 and 1.18
[ C ] 3.0 and 1.15
[ D ] 1.5 and 1.5
Answer : A
38 In Limit state method of design, the
factor of safety for concrete and steel
respectively are
[ A ] 3.00 and 1.80
[ B ] 1.50 and 1.18
[ C ] 1.50 and 1.15
[ D ] 1.50 and 1.50
Answer : C
39 Specific weight of Reinforced cement
concrete is
[ A ] 24 N/m3
[ B ] 24 kN/m3
[ C ] 25 N/m3
[ D ] 25 kN/m3
Answer : D
40 The tensile strength of concrete is
about ________ of its compressive strength
[ A ] 10% to 15%
[ B ] 30% to 40%
[ C ] 50%
[ D ] 60% to 75%
Answer : A
41 The shrinkage strain of concrete is
generally taken as
[ A ] 0.3
[ B ] 0.03
[ C ] 0.003
[ D ] 0.0003
Answer : D
42 The tensile strength of concrete is
given by
[ A ] 0.45 vfCK
[ B ] 0.60 vfCK
[ C ] 0.70 vfCK
[ D ] 0.90 vfCK
Answer : C
43 The ratio of bond stress for HYSD
bars to that of plain bars
[ A ] 0.714
[ B ] 0.9
[ C ] 1.4
[ D ] 1.8
Answer : C
44 The proof stress in steel is the stress
corresponding to the strain of
[ A ] 0.2
[ B ] 0.02
[ C ] 0.002
[ D ] 0.0002
Answer : C
45 In the mixer, the concrete should be
mixed for at least
[ A ] 1 to 2 minutes
[ B ] 2 to 3 minutes
[ C ] 3 to 5 minutes
[ D ] 5 to 7 minutes
Answer : B
46 As per IS: 456-2000, the maximum
size of aggregate is
[ A ] 1/4 of maximum thickness of member
[ B ] 1/4 of minimum thickness of member
[ C ] 1/5 of maximum thickness of member
[ D ] 1/5 of minimum thickness of member
Answer : B
47 Water used for mixing of concrete
should be free from
(i)Oils
(ii)Salts
(iii)Acids
[ A ] i
[ B ] iii
[ C ] i and iii
[ D ] i, ii and iii
Answer : D
48 Modulus of elasticity of concrete is
primarily influenced by
[ A ] Elastic properties of aggregate
[ B ] Curing of concrete
[ C ] Age of concrete
[ D ] Mix proportion and type of cement
Answer : A
49 As the workability increases
compaction factor
[ A ] Decreases
[ B ] Increases
[ C ] Remains same
[ D ] None of the above
Answer : B
50 Shrinkage of concrete is mostly
influenced by
[ A ] Environmental conditions
[ B ] Size of member
[ C ] Cement in concrete
[ D ] The total amount of water present in
concrete
Answer : D.
More will come. Please do visit the site regularly and share with your friends as well. Thank you...