Concrete Technology MCQ Practice Questions (Civil Eng) Set 8

If a grading curve is horizontal bet-wen the portions of 20 mm I.S. Sieve and 4.75 mm I.S. Sieve, the graded aggregates do not contain:


Options are :

  • 20 mm particles
  • 4.75 mm particles
  • 10 mm particles
  • All the above

Answer :All the above

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


Options are :

  • 14 kg
  • 10 kg
  • 12 kg
  • 20 kg
  • 16 kg

Answer :14 kg

The minimum percentage of chemical ingredient of cement is that of:


Options are :

  • Alumina
  • Lime
  • Silica
  • Iron oxide
  • Magnesium oxide

Answer :Magnesium oxide

Hydraulics MCQ Practice Questions (Civil Engineering) Set 10

Pick up the correct statement from the following:


Options are :

  • All the above
  • The quality of water governs the strength of concrete
  • 10% excess of water reduces the strength of concrete by 15%
  • The quantity of water required for concreting, depends upon the grading of aggregate amd method of compaction
  • 30% excess of water reduces the strength of concrete by 50%

Answer :All the above

The main object of compaction of concrete, is:


Options are :

  • All the above
  • To achieve maximum density
  • To provide initimate contact between the concrete and embedded materials
  • To eliminate air holes

Answer :All the above

A concrete using an air entrained cement:


Options are :

  • Is free from segregation and bleeding
  • Has strength less than 10% to 15%
  • Is more plastic and workable
  • Has more resistance to weathering
  • All the above

Answer :Is more plastic and workable

Hydraulics MCQ Practice Questions (Civil Engineering) Set 7

Bulking of sand is:


Options are :

  • Maximum water with sand
  • Swelling of sand when wetted
  • Mixing of different sizes of sand particles
  • Mixing of lime with sand

Answer :Swelling of sand when wetted

Particles of 0.002 mm size are that of:


Options are :

  • Sand
  • Clay
  • Gravel
  • None of these

Answer :Clay

For given workability the grading requiring the least amount of water is one that gives:


Options are :

  • Least surface area for the given cement and aggregates
  • None of these
  • Least weight for the given cement and aggregates
  • Greatest weight for the given cement and aggregates
  • Greatest surface area for the given cement and aggregates

Answer :Greatest surface area for the given cement and aggregates

Theory of Structures MCQ Practice Questions (Civil Eng) Set 6

The size of fine aggregates does not exceed:


Options are :

  • 4.75 mm
  • 2.75 mm
  • 3.75 mm
  • 5.75 mm
  • 3.00 mm

Answer :4.75 mm

The lower water cement ratio in concrete, introduces:


Options are :

  • Greater density and smaller permeability
  • All the above
  • Greater wear resistance and improved bond strength
  • Smaller creep and shrinkage
  • Improved frost resistance

Answer :All the above

Pick up the correct statement from the following:


Options are :

  • All the above
  • Continuous grading is not necessary for obtaining a minimum of air voids
  • The omission of a certain size of aggregate in concrete increases the workability but also increases the liability to segregation
  • The omission of a certain size of aggregate is shown by a straight horizontal line on the grading curve

Answer :All the above

RCC Structures Design MCQ Practice Questions (Civil Eng) Set 1

'Ware house pack' of cement means:


Options are :

  • Pressure compaction of the bags on lower layers
  • None of these
  • Packing the ware house
  • Full capacity of the ware house
  • Pressure exertion of the bags of upper layers

Answer :Pressure compaction of the bags on lower layers

The aggregate impact value of the aggregate used in:


Options are :

  • All the above
  • Road pavement concrete is less than 30
  • Building concrete is less than 45
  • Runway concrete is less than 30

Answer :All the above

The cement becomes useless if its absorbed moisture content exceeds:


Options are :

  • 4%
  • 3%
  • 2%
  • 5%
  • 1%

Answer :5%

Hydraulics MCQ Practice Questions (Civil Engineering) Set 2

The impurity of mixing water which affects the setting time and strength of concrete, is:


Options are :

  • Calcium chorides
  • Calcium bicarbonates
  • Sodium carbonates and bicarbonates
  • Sodium chlorides
  • Sodium sulphates

Answer :Sodium carbonates and bicarbonates

I.S.I. has specified the full strength of concrete after:


Options are :

  • 35 days
  • 14 days
  • 7 days
  • 21 days
  • 28 days

Answer :28 days

Pick up the correct statement from the following:


Options are :

  • The material having particles of size varying from 0.06 mm to 0.002 mm, is known as silt
  • The maximum size of a coarse aggregate, is 75 mm and minimum 4.75 mm
  • The material having particles of size less than 0.002 mm, is known as clay
  • All the above
  • The maximum size of the fine aggregate, is 4.75 mm and minimum 0.075 mm

Answer :All the above

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

The concrete mix which causes difficulty in obtaining a smooth finish, possess:


Options are :

  • Bleeding
  • Harshness
  • Segregation
  • Internal friction
  • None of these

Answer :Harshness

Inert material of a cement concrete mix, is:


Options are :

  • Cement
  • Water
  • None of these
  • Aggregate

Answer :Aggregate

Le-Chatelier's apparatus is used for testing:


Options are :

  • Hardness of cement
  • Strength of cement
  • Soundness of cement
  • Durability of cement

Answer :Soundness of cement

RCC Structures Design MCQ Practice Questions (Civil Eng) Set 1

On a grading curve, the gap grading is represented by:


Options are :

  • N.E. inclined line
  • A vertical line
  • N.W. inclined line
  • A horizontal line
  • None of these

Answer :A horizontal line

The maximum percentage of chemical ingredient of cement is that of:


Options are :

  • Magnesium oxide
  • Iron oxide
  • Lime
  • Silica
  • Aluminium

Answer :Lime

The bulk density of aggregates, depends upon:


Options are :

  • All the above
  • Grading
  • Shape
  • Compaction

Answer :All the above

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

Comment / Suggestion Section
Point our Mistakes and Post Your Suggestions