Following plastic material is used to make building floors less susceptible to wear & tear
- HDPE
- PVC & polyethylene
- EVA
- LDPE
Density of Aluminium is
- 1.7 g/cm³
- 2.7 g/cm³
- 3.7 g/cm³
- 4.7 g/cm³
Which of the instruments is needed for testing the fineness of the cement?
- Le-Chatelier apparatus
- Vicat’s needle
- Air permeability apparatus
- Slump cone
As per IS 456:200, the minimum cement content for Reinforced concrete member with normal weight aggregates of 20 mm nominal maximum size for severe exposure condition is __________.
- 320 kg/m³
- 250 kg/m³
- 200 kg/m³
- 350 kg/m³
The separation of coarse aggregate from mortar during transportation of concrete is termed
- Bleeding
- Creeping
- Segregation
- Cohesion
The __________ in excess makes the cement unsound and causes the cement to expand and disintegrate
- Silica
- Alumina
- Magnesia
- Lime
Smith’s test of stones is performed to find out
- the presence of soluble matter of stone
- the compressive strength of the stone
- the hardness of the stone
- the toughness of the stone
The apparatus used for finding the soundness of cement
- Le-Chatelier Apparatus
- Slump cone test
- Vicat Apparatus
- Marsh cone test
Which test measures the stability of Self-Compacting concrete (SCC)
- J-Ring
- L-Box
- V-funnel
- Column / Probe segregation
The timber piece whose breadth and thickness exceed 50 mm, but are less than 200 mm in length is called
- Pole
- Baulk
- Scantling
- Batten
Jhama bricks are
- well burnt having smooth and even surface
- over burnt with regular shape
- under burnt and can be easily broken
- slightly over burnt having rough surface
The rock which is not calcareous, is
- limestone
- mael
- chalk
- laterite
To construct brick masonry of one cubic meter, number of bricks required are
- 300
- 500
- 800
- 1000
Mortar used for construction work in waterlogged areas & exposed positions is of proportion
- 1 : 1
- 1 : 2
- 1 : 3
- 1 : 4
Vanadium steel is normally used in the manufacture of
- axle and springs
- ball bearings
- magnets
- railway switches and crossings
The total number of test strength of samples required to constitute an acceptable record for calculation of standard deviation for each grade of concrete shall not be less than
- 15
- 21
- 28
- 30
One of the main demerits in using the lime mortar is that it
- is not durable
- does not set quickly
- swells
- is plastic
If p is the standard consistency of cement, the amount of water used in conducting the initial setting time test on cement is
- 0.65p
- 0.85p
- 0.60p
- 0.80p
For a normal RCC work, the slump of concrete should be in the range of
- 0 – 25 mm
- 25 – 50 mm
- 80 – 150 mm
- 50 – 125 mm
In fineness test of Rapid Hardening Portland Cement (RHPC) the residue on IS sieve No. 9 should not be more than
- 1.0%
- 5%
- 10%
- 15%
