Principle of Civil and Structural Engineering Mid - II, November - 2014

1.Concrete is considered to be” high strength concrete” if the strength is greater than or equal to
  • 35 Mpa
  • 40 Mpa
  • 55 Mpa
  • 60Mpa
Answer: D
2.In Casting Cylinders for compression Test the l/d ratio is maintained as
  • l/d =2
  • l/d > 2
  • l/d < 2
  • None of the above
Answer: A
3.Method which is very suitable for very dry concrete to determine the slump value
  • Compaction Factor Test
  • Kelly Ball Test
  • Flow Table Test
  • Vee Bee consistometer
Answer: D
4.With the increase in grade of cement the fineness of the cement
  • Increases
  • Remains Same
  • decreases
  • grade doesnot depend on fineness
Answer: A
5.Normally strength of the cylinder is taken as __________times the strength of the cube
  • 0.9
  • 0.6
  • 0.7
  • 0.8
Answer: D
6.Method which does not come under Non Destructive Testing Methods
  • Rebound Hammer
  • Pulse Velocity Method
  • Compressive Testing
  • Penetration Techniques
Answer: C
7.Modulus of elasticity which is found out from actual loading
  • Secant Modulus
  • Tangent Modulus
  • Static Modulu
  • Initial Tangent Modulus
Answer: C
8.Dimensions of the Steel tamping rod used in slump cone test are
  • 16mm dia and 0.6m length
  • 12mm dia and 0.2m length
  • 14mm dia and 0.8m length
  • 13mm dia and 0.5m length
Answer: A
9._________ is defined as the volume of the hydrated cement paste to the sum of the volumes of the hydrated cement and of the capillary pores
  • Abrams Law
  • Gel Space Ratio
  • plowman’s Co-efficient
  • Power’s Co-efficient
Answer: B
10._________is the shrinkage occurring when there is no moisture movement to or from the paste ,at constant temperature.
  • Carbonation Shrinkage
  • Autogeneous Shrinkage
  • Drying Shrinkage
  • Plastic Shrinkage
Answer: B
11.__________ is defined as the separation of constituent materials of concrete.
Answer: Seggregation
12.Dimensions of the Slump Cone used in slump cone test are _________.
Answer: Dia =10cm, Bottom Dia= 20 cm and height=30 cm
13.Compaction Factor is the ratio of ____________.
Answer: Weight of partially compacted concrete / Weight of fully compacted concrete
14._____________is the lowest specific gravity among all the ingredients of concrete.
Answer: Water
15.With the increase in water to cement ratio the strength of the concrete ____________.
Answer: Decreases
16.Maturity concept of concrete is the dependent of both _____________ and ____________.
Answer: Time and temperature
17.Shape of the Aggregate that is more preferable for concreting is ______________.
Answer: Angular
18.To hydrate all the particles of cement and also to occupy the space in gel pores the water cement ratio about ____________ is required.
Answer: 0.38
19.The largest nominal size of the aggregate used in casting of cubes should not exceed _________.
Answer: 20mm
20.__________________is defined as the time dependent part of the strain resulting from stress.
Answer: Creep