250+ Concrete Technology MCQs

Section 1

Questions 1 - 10

1

Question 📋 TU 2082/05/23

The 28 days of compressive strength of M20 grade concrete is ..... Mpa.

A 10 B 20 C 30 D 40

2

Question 📋 TU 2082/05/23

What is the purpose of concrete mix design?

A To determine the aesthetic finish B To optimize the proportions of ingredients for desired proportion C To reduce the cost of transportation D To increase the curing time

3

Question 📋 TU 2082/05/23

The purpose of plasticizer in concrete is to

A Reduce water content B Increase strength C Decrease durability D Increase heat of hydration

4

Question 📋 TU 2082/05/23

Which method is used to increase the workability of concrete during placement?

A Hand compaction B Tamping C Vibration D Air drying

5

Question 📋 TU 2082/05/23

Which types of concrete is designed to withstand high loads before failure?

A Light weight concrete B Prestressed concrete C Aerated concrete D Foam concrete

6

Question 📋 2082/02/24 BAGMATI

Maximum percentage of chemical ingredient in cement is

A Silica B Lime C Alumina D Iron oxide

7

Question 📋 2082/02/03 KOSHI

What is the primary benefit of well graded aggregates in concrete?

A Improve aesthetics B Reduced cost C Decreased setting time D Increased strength and workability

8

Question 📋 2082/01/27 C

Bulking of sand is caused due to

A Surface moisture B Air voids C Viscosity D Clay contents

9

Question 📋 2082/01/27 C

The apparatus used to find setting time of concrete is

A Le-Chatelier's apparatus B Vicat apparatus C Universal testing machine D Vernier Calliper

10

Question 📋 2082/01/20 KOSHI

In slump test, each layer of concrete is compacted by a steel rod 60 cm long and 16 mm diameter for:

A 20 times B 25 times C 30 times D 35 times

Section 2

Questions 11 - 20

11

Question 📋 2082/01/20 KOSHI

Well graded aggregates in concrete:

A Have particles of uniform size B Have particles of varies sizes with minimum voids C Contain only coarse particles D Contain only fine particles

12

Question 📋 2082/01/20 KOSHI

Minimum grade of concrete to be used in Reinforced concrete is

A M20 B M15 C M25 D M10

13

Question 📋 2082/01/20 KOSHI

The final operation of finishing floors is known as

A Floating B Troweling C Screeding D None of above

14

Question 📋 2082/01/20 KOSHI

The earliest period for removing formwork from the RCC slab of a span up to 4.0 m under normal atmospheric condition should be:

A 3 days B 7 days C 21 days D 28 days

15

Question 📋 2082/01/20 KOSHI

Separation of coarse aggregate from mortar during transportation, is known as

A Bleeding B Segregation C Creeping D None of above

16

Question 📋 2081/12/23 KOSHI

The quality of cement is good, if it has more of

A Tricalcium silicate B Free lime C Tricalcium aluminate D Dicalcium silicate

17

Question 📋 2081/12/23 KOSHI

The process keeping concrete moist to allow continued hydration is called

A Finishing B Curing C Setting D Hardening

18

Question 📋 2081/12/16 LUMBINI

Gypsum is used in cement for the purpose of

A Increasing the strength B Quick setting cement C Slowing down the setting process D Good texture of cement

19

Question 📋 2081/12/16 LUMBINI

Which one of the construction materials is not a constituent of cement concrete?

A Aggregate B Sand C Water D Stone

20

Question 📋 2081/11/07 KOSHI

What is the primary purpose of prestressed concrete in structural engineering?

A To reduce the overall weight of the structure B To improve the aesthetic appearance of concrete elements C To increase the compressive strength of the concrete D To counteract the tensile stresses that develop in concrete

Section 3

Questions 21 - 30

21

Question 📋 2081/11/07 KOSHI

Which test is commonly performed to assess the consistency and workability of fresh concrete

A Compressive strength test B Flexural strength test C Slump test D Abrasion resistance test

22

Question 📋 2081/11/07 KOSHI

The constituent responsible for providing workability to fresh concrete is

A Cement B Aggregates C Water D Admixture

23

Question 📋 2081/11/07 KOSHI

The process of determining the proportions of the ingredients of concrete to achieve the desired properties is called

A Concrete placement B Concrete curing C Concrete testing D Concrete mix design

24

Question 📋 2081/11/07 KOSHI

Aerated concrete is produced by the addition of

A Powdered aluminum B Zinc sulphate C Magnesium sulphate D Sodium nitrate

25

Question 📋 2081/11/07 KOSHI

Le Chatelier Apparatus is used to perform

A Fineness test B Compressive strength test C Consistency test D Soundness test

26

Question 📋 2081/11/07 KOSHI

For a concrete mix 1:3:6 and water cement ratio 0.6 both by weight, the quantity of water required per bag is

A 10 kg B 12 kg C 16 kg D 14 kg

27

Question 📋 2081/11/07 KOSHI

If aggregates completely pass through sieve of size 75 mm and are retained on a sieve of size 60 mm, the particular aggregate will be flaky if its minimum dimension is less than

A 20.5 mm B 30.5 mm C 40.5 mm D 50.5 mm

28

Question 📋 2081/11/07 KOSHI

In case of hand mixing of concrete, the extra cement to be added is

A 5% B 10% C 15% D 20%

29

Question 📋 2081/11/07 KOSHI

FM (Fineness Modulus) of sand is 2.5, then it is graded as

A Very fine sand B Fine sand C Coarse sand D Very coarse sand

30

Question 📋 2081/11/07 KOSHI

Which property of cement contributes to its strength gain over time and its ability to maintain structural integrity under varying conditions?

A Low carbon content B High plasticity C Hydration D Low compressive strength

Section 4

Questions 31 - 40

31

Question 📋 2081/11/07 GANDAKI

The function of aggregate in concrete is to serve as

A Building material B Filler C Catalyst D All of these

32

Question 📋 2081/11/07 GANDAKI

When the water cement ratio is increased, workability

A Decreases B Increases C Remains same D None of above

33

Question 📋 2081/11/07 GANDAKI

Cement is said to be of good quality if:

A Its color is not greenish grey B One feels cool by thrusting one's hand in the cement bag C It is not smooth when rubbed in between fingers D A handful of cement thrown into a bucket of water does not float

34

Question 📋 2081/11/07 GANDAKI

Water cement ratio is:

A Weight of water to that of cement B Weight of concrete to that of water C Volume of concrete to that of water D None of above

35

Question 📋 2081/11/07 GANDAKI

The formwork from the underside of slab, can be removed only after

A 7 days B 14 days C 21 days D 30 days

36

Question 📋 2068/11/03

The lowest water-cement ratio in concrete produces

A small creep and shrinkage B more density C more bond D all of above

37

Question 📋 2068/11/03

What should be lowest pH value of water used in concrete?

A 9 B 8 C 7 D 6

38

Question 📋 2068/11/03

Water cement ratio for high strength concrete generally can be in the range

A 0.23 B 0.4–0.6 C 0.55–0.75 D 0.61–0.65

39

Question 📋 2068/11/03

Minimum grade of concrete to be used in reinforced concrete is

A M15 B M20 C M10 D M25

40

Question 📋 2068/11/03

If fineness modulus of sand is 2.5, it is graded as

A very fine B fine C medium D coarse

Section 5

Questions 41 - 50

41

Question 📋 2068/11/03

The mixture of different ingredients of cement for its manufacture is burnt at

A 1000 °C B 1200 °C C 1400 °C D 1600 °C

42

Question 📋 2068/11/03

Which of the following chemical should be added to reduce the curing time of concrete?

A sodium chloride B calcium chloride C potassium D magnesium

43

Question 📋 2068/11/03

Special method of making high strength of concrete are

A seeding and revibration B high speed slurry mixing C use of admixture seeding and inhibition cracks D all of above

44

Question 📋 2068/11/03

In Vicat's apparatus, the diameter of Vicat plunger is

A 5 mm B 10 mm C 15 mm D 20 mm

45

Question 📋 2068/11/03

Slump test for the concrete is carried out for

A workability B durability C strength D ductility

46

Question 📋 2068/11/03

Expansion joints are provided if the length of concrete structure exceeds

A 40 m B 30 m C 20 m D 15 m

47

Question 📋 2069/10/06

Which of the following cement is suitable for use in massive concrete structures such as big dams?

A Ordinary Portland Cement B Low Heat Cement C Rapid Hardening Cement D Sulfate resisting Cement

48

Question 📋 2069/10/06

The degree of grinding of cement is called

A fineness B soundness C impact value D bulking

49

Question 📋 2069/10/06

Tri-calcium aluminate

A react fast with water B generates maximum heat of hydration C hardens rapidly D none of above

50

Question 📋 2069/10/06

Calcium chloride used as an admixture in concrete is

A an accelerator B a retarder C a water proofing compound D none of above

Section 6

Questions 51 - 60

51

Question 📋 2069/10/06

Curing

A reduces the shrinkage of concrete B preserves the properties of concrete C prevents the loss of water by evaporation D all of above

52

Question 📋 2069/10/06

Slump of concrete is a measure of its

A consistency B compressive strength C tensile strength D impact value

53

Question 📋 2069/10/06

High temperature

A increases the strength of concrete B decreases the strength of concrete C has no effect on the strength of concrete D none of above

54

Question 📋 2069/10/06

The minimum percentage of chemical ingredient of cement is

A magnesium oxide B iron oxide C aluminium D lime

55

Question 📋 2069/10/06

The concrete having a slump of 6.5 cm, is said to be

A dry B earth moist C semi-plastic D plastic

56

Question 📋 2069/10/06

The resistance of an aggregate to wear is known as

A shear resistance B crushing resistance C abrasion resistance D impact value

57

Question 📋 2069/10/06

Low heat cement is preferred for

A slabs B columns C dams D foundation

58

Question 📋 2069/10/06

Gypsum is added to the cement clinker to

A impart grey color to it B control the flash setting of cement C control the shrinkage cracks in cement concrete D increases workability of cement mortar

59

Question 📋 2069/10/06

The approximate value of the ratio between direct tensile strength and flexural strength is

A 1.00 B 0.75 C 0.60 D 0.50

60

Question 📋 2069/10/06

The cube strength of the concrete used for pre-stressed member should not be less than

A 10 MPa B 15 MPa C 35 MPa D 45 MPa

Section 7

Questions 61 - 70

61

Question 📋 2070/11/14

Strength of cement by storage

A same B decreases C increases D none of above

62

Question 📋 2070/11/14

To retard the initial setting time of cement, the compound responsible is

A gypsum B tri calcium silicate C tri calcium aluminate D tetra calcium alumino ferrite

63

Question 📋 2070/11/14

Horizontal construction joints in concrete walls are generally provided at

A window sill level B soffit level C floor level D beam level

64

Question 📋 2070/11/14

Gypsum is added in concrete for

A color B strength C controlling setting time D none of these

65

Question 📋 2070/11/14

The ratio of various ingredients (cement, sand, aggregates) in concrete of grade M20 is

A 1:2:4 B 1:3:6 C 1:1.5:3 D 4:2:1

66

Question 📋 2070/11/14

If fineness modulus of fine aggregate is 2.52, it can be graded as

A very fine sand B fine sand C medium sand D coarse sand

67

Question 📋 2070/11/14

The ratio of cylindrical compressive strength to that of cube compressive strength is approximately

A 80% B 60% C 120% D 95%

68

Question 📋 2070/11/14

In case of prestressed concrete, prestressing force is

A compressive force B shear force C tensile force D normal force

69

Question 📋 2070/11/14

Workability of concrete increased due to an excess of

A cement B water C fine aggregate D all of above

70

Question 📋 2070/11/14

Vicat's apparatus is used for

A soundness test B setting time test C fineness test D consistency test

Section 8

Questions 71 - 80

71

Question 📋 2070/11/14

The concrete mix which causes difficulty in obtaining a smooth finish possesses

A hardness B segregation C internal friction D bleeding

72

Question 📋 2070/11/14

If the side of concrete cubes is reduced from 15 cm to 5 cm, the test results

A are likely to the same B will give reduced strength C will give increased strength D are independent of the size of the cube

73

Question 📋 2070/11/14

The presence of following substance in water has an adverse effect on the setting time of cement

A sodium carbonate and bicarbonate B calcium chloride C sodium chloride D sodium sulphate

74

Question 📋 2070/11/14

The compressive strength of an ordinary Portland cement cube (1:3 cement mortar) after 7 days should not be less than

A 11 N/mm2 B 17.5 N/mm2 C 22 N/mm2 D 25 N/mm2

75

Question 📋 2071/11/09

The grade generally not used in the reinforced concrete is

A M10 B M15 C M20 D M40

76

Question 📋 2071/11/09

The function of aggregates in concrete is to serve as

A building material B filler C catalyst D all of above

77

Question

The seven-day compressive strength of an ordinary Portland cement as obtained from the compressive test on cement sand mortar cubes, should not be less than

A 125 kg/cm2 B 150 kg/cm2 C 175 kg/cm2 D 200 kg/cm2

78

Question 📋 2071/11/09

Separation of coarse aggregate from mortar during transportation is known as

A bleeding B creeping C segregation D shrinkage

79

Question 📋 2071/11/09

The chemistry of concrete is essentially the chemistry of, the reaction between

A cement and aggregate B water and aggregate C cement and water D aggregate and air

80

Question 📋 2071/11/09

The material that is added at the time of grinding cement clinker at the cement factory is called

A admixture B additive C slag D pozzolana

Section 9

Questions 81 - 90

81

Question 📋 2071/11/09

Workability of concrete is inversely proportional to

A time of transit B water cement ratio C cement in the mix D air in the mix

82

Question 📋 2071/11/09

For a 1:2:4 concrete mix, roughly the water/cement ratio can be taken as

A 0.30 B 0.45 C 0.50 D 0.60

83

Question 📋 2071/11/09

The most effective admixture to concrete lay keeping its surface moist is known as

A white lime B soap solution C bitumen D sugar

84

Question 📋 2071/11/09

The process of hardening the concrete for retarding the setting time is the addition of water is

A placing B wettings C curing D compacting

85

Question 📋 2071/11/09

Setting time of concrete increases by adding

A gypsum B calcium chloride C sodium oxide D calcium sulphate

86

Question 📋 2071/11/09

Slump test is done for

A clay B sand C lime D concrete

87

Question 📋 2071/11/09

Concrete is generally reinforced by bars made of

A cast iron B high carbon steel C low carbon steel D mild steel

88

Question 📋 2071/11/09

In a "normal" mixing of concrete, the proportioning of its constituents is

A measured separately by volume B measured separately C sand and stone are mixed by volume and cement is added later D sand and stone are mixed by weight and cement is added later

89

Question 📋 2071/11/09

Strain in concrete at zero stress is called

A creep loss B relaxation C shrinkage D lateral stress

90

Question 📋 2072/11/08

Consider the correct statements regarding aggregates

A dry aggregates absorb water from the mixing water and their affect the workability B aggregates containing surface moisture contributes extra strength C the free moisture content in fine aggregate results in reduction volume D none of above

Section 10

Questions 91 - 100

91

Question 📋 2072/11/08

The property of fresh concrete, in which the water in the mix tends to rise to the surface while placing and compaction is known as

A bleeding B creep C segregation D shrinkage

92

Question 📋 2072/11/08

Workability of concrete is directly proportional to

A aggregate cement ratio B time of transit C grading of aggregates D all of above

93

Question 📋 2072/11/08

Which type of vibrator is preferable for compaction of concrete in road works?

A external B internal C table D surface

94

Question 📋 2072/11/08

Recommended values for slump of concrete for mass concrete without vibrations falls within the range of

A 10-25 mm B 40-50 mm C 60-80 mm D 100-75 mm

95

Question 📋 2072/11/08

A rich mix of concrete is a mix with the high content of

A cement B sand C fine aggregate D coarse aggregate

96

Question 📋 2072/11/08

The entrained air in concrete

A increases workability B decreases workability C decrease resistance to weathering D increases strength

97

Question 📋 2072/11/08

Finer grinding of cement

A affects only the early development of strength B affects only the ultimate strength C both of above D does not affect the strength

98

Question 📋 2072/11/08

The quantity of coarse and fine aggregate is slightly reduced when the concrete mix is

A two wet B too dry C excessively plastic D too fat

99

Question 📋 2072/11/08

In case of high strength concrete, high increase in temperature

A increases the strength of concrete B has no effect on the strength of concrete C decreases the strength of concrete D helps to harden the concrete fast for under water concreting

100

Question 📋 2072/11/08

The gradual and continuous yielding of concrete which becomes permanent deformation when applied a load for some time is

A bleeding B creep C cribbling D setting

Section 11

Questions 101 - 102

101

Question 📋 2073/11/16

The types of aggregate of same nominal size, which contain less voids when compacted are

A rounded spherical B irregular C flaky D none of above

102

Question 📋 2073/11/16

The minimum water-cement ratio to obtain workable concrete is

A 0.35 B 0.40 C 0.45 D 0.50

250+ Concrete Technology MCQs ✨ Free Access

Section 1

Section 2

Section 3

Section 4

Section 5

Section 6

Section 7

Section 8

Section 9

Section 10

Section 11

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250+ Concrete Technology MCQs ✨ Free Access

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