Concrete Technology MCQ Practice Questions (Civil Eng) Set 7

If the various concrete ingredients i.e. cement, sand and aggregates are in the ratio of 1:3:6, the grade of concrete, is:


Options are :

  • M 300
  • M 100
  • M 150
  • M 250
  • M 200

Answer :M 100

The entrained air in concrete:


Options are :

  • Increases workability
  • Increases strength
  • Decreases workability
  • Decreases resistance to weathering
  • Neither affects workability nor strength

Answer :Increases workability

Higher workability of concrete is required if the structure is:


Options are :

  • Made with cement concrete
  • Thin and heavily reinforced
  • Thick and reinfored
  • Thick and heavily reinfored

Answer :Thick and heavily reinfored

RCC Structures Design MCQ Practice Questions (Civil Eng) Set 7

Pick up the incorrect statement from the following:


Options are :

  • None of these
  • Tricalcium silicate (C3S) generates more heat of hydration
  • Tricalcium silicate (C3S) develops early strength
  • Tricalcium silicate (C3S) hydrates rapidly
  • Tricalcium silicate (C3S) has more resistance to sulphate attack

Answer :Tricalcium silicate (C3S) has more resistance to sulphate attack

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


Options are :

  • 20 times
  • 40 times
  • 25 times
  • 30 times
  • 50 times

Answer :25 times

Gypsum is added for:


Options are :

  • Controlling setting time
  • Colour
  • None of these
  • Strength

Answer :Controlling setting time

RCC Structures Design MCQ Practice Questions (Civil Eng) Set 8

Pick up the correct statement from the following:


Options are :

  • Sea shore sand contains chlorides which cause effloresance
  • Sand obtained from flooded pits, need not be washed before use
  • The chloride in sea shore sand and shingle may cause corrosion of reinforcement if the concrete is porous
  • Sand obtained from pits, is washed to remove clay and silt
  • All the above

Answer :All the above

Pick up the correct statement from the following:


Options are :

  • 10% of water is placed in the rotating drum before adding dry material
  • All the above
  • 10% of water is added after placing the other ingredients in the drum
  • There should not be any loss of cement from the charged drum of the mixer
  • Cement should be mixed for at least one minute

Answer :All the above

Pozzolanic properties exist in:


Options are :

  • All the above
  • Pumicite
  • Shales
  • Diatomaceous clay
  • Fly ash

Answer :All the above

Construction Management MCQ Practice Questions (Civil Eng) Set 3

The process of mixing, transporting, placing and compacting concrete using Ordinary Port land Cement should not take more than:


Options are :

  • 75 minutes
  • 60 minutes
  • 30 minutes
  • 90 minutes
  • 40 minutes

Answer :30 minutes

The 28 days cube strength of mass concrete using aggregates of maximum size 5 cm for gravity dams should be:


Options are :

  • Below 200 kg/cm^(2)
  • Between 150 to 500 kg/cm^(2)
  • Between 150 to 300 kg/cm^(2)
  • Between 350 to 600 kg/cm^(2)
  • None of these

Answer :Below 200 kg/cm^(2)

Non-uniform compaction may cause the concrete:


Options are :

  • Reduced strength
  • All the above
  • Non-homogeneous
  • Porous

Answer :All the above

RCC Structures Design MCQ Practice Questions (Civil Eng) Set 3

To prevent segregation, the maximum height for placing concrete, is:


Options are :

  • 200 cm
  • 150 cm
  • 100 cm
  • 250 cm
  • 125 cm

Answer :100 cm

Pick up the incorrect statement from the following:


Options are :

  • Cement bags should preferably be piled on wooden planks
  • None of these
  • Space between the exterior walls of a warechouse and bag piles should be 30 cm
  • Width and height of the pile should not exceed 3 m and 2.70 m respectively
  • Cement bags should be placed such that bags of one layer does not touch the bags of the adjacent layer

Answer :None of these

In the method of voids for determination of the quantity of cement paste, it is assumed that:


Options are :

  • Voids in coarse aggregates are filled by fine aggregates
  • All the above
  • Volume of fine aggregates is equal to total voids in coarse aggregates plus 10% extra
  • Voids in fine aggregates are filled by the cement paste
  • Volume of cement paste required is equal to total volume of voids in fine aggregates plus 15% extra

Answer :All the above

Hydraulics MCQ Practice Questions (Civil Engineering) Set 7

An aggregate is known as cyclopean aggregate if its size is more than:


Options are :

  • 75 mm
  • 30 mm
  • 4.75 mm
  • 90 mm
  • 60 mm

Answer :75 mm

Placing of concrete should preferably be done at a temperature of:


Options are :

  • 10C
  • 23C
  • 27 2C
  • 0C
  • 20C

Answer :27 2C

Pick up the incorrect statement from the following:


Options are :

  • With passage of time, the strength of cement increases
  • After a period of 24 months, the strength of cement reduces to 50%
  • With passage of time, the strength of cement decreases
  • The concrete made with storage deteriorated cement, gains strength with time
  • None of these

Answer :With passage of time, the strength of cement increases

Irrigation MCQ Practice Questions (Civil Engineering) Set 5

Sand generally contains salt if it is obtained from:


Options are :

  • Nala beds
  • River beds
  • Sea beds
  • All the above
  • None of these

Answer :Sea beds

Sands of zone I are:


Options are :

  • Medium to fine
  • Fine
  • Coarse
  • Medium

Answer :Coarse

Concrete is unsuitable for compaction by a vibrator if it is:


Options are :

  • Earth moist
  • Semi-plastic
  • None of these
  • Plastic
  • Dry

Answer :Plastic

Hydraulics MCQ Practice Questions (Civil Engineering) Set 10

Pick up the correct statement from the following:


Options are :

  • Construction joints in columns are provided at the bottom haunching
  • Construction joints in beams and slabs are provided within middel third
  • All the above
  • Constructionjoints are generally provided in positions subjected to least shear force
  • Construction joints in columns are provided a few cm below the junction of beam

Answer :All the above

Curing of pavements, floors, roofs and slabs, is done by:


Options are :

  • Membrane method
  • Covering surface with bags
  • Ponding method
  • Shading concrete method
  • Sprinkling water method

Answer :Ponding method

Di-calcium silicate (C2S):


Options are :

  • Has less resistance to sulphate attack
  • Hardens rapidly
  • Provides less ultimate strength to cement
  • Hydrates rapidly
  • Generates less heat of hydration

Answer :Generates less heat of hydration

Construction Management MCQ Practice Questions (Civil Eng) Set 3

The surface where two successive placements of concrete meet, is known as:


Options are :

  • Contraction joint
  • Both A and B
  • Both B and C
  • Construction joint
  • Expansion joint

Answer :Construction joint

Pick up the correct statement from the following:


Options are :

  • The specific gravity of aggregate is important for the determination of the moisture content
  • The bulk density of fine aggregate is usually about 10 per cent more than that of coarse aggregate of similar composition
  • The absorption and porosity of an aggregate influence the property of the concrete
  • All the above
  • A highly absorptive aggregate reduces the workability of concrete considerably

Answer :All the above

Horizontal construction joints in concrete walls are generally provided at:


Options are :

  • Floor level
  • Soffit level
  • Window sill level
  • All the above

Answer :All the above

Irrigation MCQ Practice Questions (Civil Engineering) Set 2

Pick up the incorrect statement from the following:


Options are :

  • Concrete mix 1 : 6 : 12, is used for mass concrete in piers
  • Bulking of sand depends upon the fineness of grains
  • Workability of the concrete mix decreases with an increase in the moisture content
  • All the above
  • Concrete for which preliminary tests are conducted, is called controlled concrete

Answer :All the above

The specifications of a cement bag for storage, are:


Options are :

  • Plan area 3000 sq. cm
  • All the above
  • Weight 50 kg
  • Height 18 cm
  • Volume 35 litres

Answer :All the above

An excess of flaky particles in concrete aggregates:


Options are :

  • All the above
  • Increases the quantity of water and sand
  • More than 15% are not desirable
  • Decreases the workability
  • Affects the durability of concrete

Answer :All the above

Concrete Technology MCQ Practice Questions (Civil Eng) Set 6

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