Building Materials
If P is the standard consistency of cement, the amount of water used in conducting the initial setting time test on cement is
- 0.6 P
- 0.8 P
- 0.65 P
- 0.85 P
The approximate Calcium oxide composition limits of Ordinary Portland cement is
- 60 – 67%
- 17 – 25%
- 3 – 8%
- 0.1 – 4%
Which of the following types of steel is used in manufacturing of rails?
- Mild steel
- Cast steel
- Bessemer steel
- Manganese steel
The main disadvantage of concrete blocks used for masonry as compared to bricks is
- lower strength
- higher moisture content
- more requirement of mortar
- Shrinkage due to moisture movement
As per IS 456:2000, the slump for concrete to be used in slipform work and in pumped concrete is
- 50-75 mm
- 75-100 mm
- 100-125 mm
- 125-150 mm
Building Materials
Which of the following statement(s) is / are correct with reference to determination of Consistency of Concrete by Vee-Bee Consistometer method?
i. The slump of sample A is 40 mm and the same for sample B is 120 mm. Vee-bee degrees for sample A is less than that of sample B.
ii. If the number of Vee-bee degrees for a sample is 35, then there is a risk of segregation.
- Only (i)
- Only (ii)
- Both (i) & (ii)
- Neither (i) nor (ii)
The most undesirable properties of water used for making concrete or mortar are:
- high concentration of carbonates
- high concentration of bicarbonates
- high concentrations of sulfate and chloride
- high concentration of silicates
Granite is an example of
- Sedimentary rock
- Metamorphic rock
- Igneous Rock
- Aqueous rock
According to the Indian Standards, the limit of loss on ignition for Ordinary Portland Cement (53 Grade) in percent by Mass is
- 3%
- 4%
- 5%
- 6%
Which of the following is not a property of high performance concrete?
- High early strength
- High abrasion resistant
- High modulus of elasticity
- High permeability
Building Materials
Sandstone is
- sedimentary rock
- metamorphic rock
- extrusive igneous rock
- intrusive igneous rock
Quick Lime is a
- Carbonate of lime
- Oxide of calcium
- Product left immediately after the calcination of pure limestone
- Lime quickly treated with water
The maximum quantity of water per 50 kg of cement for M20 nominal mix concrete is
- 30 liters
- 34 liters
- 42 liters
- 50 liters
The ability of a material to withstand prolonged action of high temperature without melting or losing shape is known as
- Malleability
- Hardness
- Toughness
- Refractoriness
Which of the following tests use the machine which can be used for measuring both the compressive strength and the splitting strength of concrete?
- Brazilian test
- Double punch test
- Ring tension test
- Compaction factor test
Building Materials
Correct match of Column I (chemical classification of rocks) with Column II (main mineral/s contained in the rock) is
- P-2, Q-3, R-1
- P-3, Q-1, R-2
- P-1, Q-3, R-2
- P-2, Q-1, R-3
Which of the following aggregates gives maximum concrete strength?
- Cubical aggregate
- Elongated aggregate
- Rounded aggregate
- Flaky aggregate
Which of the following statement(s) is / are correct for bamboo?
i. It has tensile strength in range of 100 – 300 MPa
ii. It can be used as a reinforcement in cement concrete for non-dynamic or static load conditions after proper treatment
- Only (i)
- Only (ii)
- Both (i) and (ii)
- Neither (i) nor (ii)
If the fineness modulus of sand is 3, then the sand is graded as
- Very Fine Sand
- Fine Sand
- Medium Sand
- Coarse Sand
The fineness of cement is expressed as
- mm
- m²/kg
- grade
- kg/m³
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