If P is the percentage of water required for determination of normal consistency of cement, then percentage of water to be added for determination of initial setting time is
0.70P
0.75P
0.80P
0.85P
Which of the following statement(s) is/are correct?
(i) An excess of asphaltene makes bitumen brittle and non-plastic.
(ii) Tar contains very high bitumen content.
Only (i)
Only (ii)
Both (i) and (ii)
Neither (i) nor (ii)
The distortion of a piece of timber in which the face becomes concave or convex longitudinally is known as
Cup
Twist
Spring
Bow
The minimum comprehensive strength of a first class brick should be
100 kg/cm²
200 kg/cm²
300 kg/cm²
400 kg/cm²
The maximum particle size of fine aggregate is
4.75 mm
2.5 mm
2.36 mm
10 mm
The cement and water slurry coming on top and setting on the surface is called
Efflorescence
Laitance
Honey-combing
Crazing
A bulked sand sample measures 100 mm in a cylindrical glass container. After adding sufficient water, it comes down to 80 mm. What is the bulking in percentage?
20
25
75
80
Admixtures which cause early setting and hardening of concrete are called _________________
Plasticizers
Retarders
Super plasticizer
Accelerators
A good quality stone absorbs water less than
5%
10%
15%
20%
Which of the following is a correct combination for admixture and its purpose as mentioned in the table below?
A – 2, B – 3, C – 4, D – 1
A – 4, B – 3, C – 2, D – 1
A – 2, B – 1, C – 4, D – 3
A – 2, B – 3, C – 1, D – 4
Size of standard modular brick is
19 cm × 9 cm × 9 cm
19 cm × 9 cm × 4 cm
20 cm × 10 cm × 10 cm
20 cm × 10 cm × 5 cm
The fineness of cement is tested by
Vicat’s apparatus
Le-Chatelier apparatus
Air-permeability method
Air-content method
Which construction technology will be the most suitable for Rural Infrastructure?
Cast in situ construction technology where all structure elements are cast on site
Precast construction technology where all structural elements are cast and cured at one place and transported to site and installed using cranes
Pre-fab construction technology where the components are first fabricated on site and then assembled using cranes
None of the above
Polyvinyl chloride (PVC) is a
thermosetting material
thermoplastic material
elasto-plastic material
rigid plastic material
The percentage of water absorption allowed as per IS 3495 part 2 1992 after 24 hours of immersion in cold water for 1st Class bricks is
10
20
15
25
Which of the following are the ideal applications of aluminum in construction industry?
Facades, formworks and scaffolding
Reinforcement, columns and beams
Facades, reinforcement and beams
Formworks, scaffolding and columns
Which test is performed to determine the tensile strength of concrete
Compression test
Tension test
Flexure test
Split compression test
Refractory bricks resist
(i) high temperature
(ii) chemical reaction
(iii) dampness
Only (i)
(i) and (ii)
(ii) and (iii)
(i), (ii) and (iii)
Falling out of plaster defect may arise due to
The adhesion of the plaster to the background may not be perfect
Inadequate curing of plaster
Excessive thermal changes in plaster
All of the above
Which of the following statements is incorrect for stone lintels in reference to support bearing?
The stone lintels shall be well bonded into masonry on either side
The bearing length can be reduced by increasing the thickness of the stone lintels
The bearing length on either side shall not be less than depth of the lintel
The bearing length on either side shall not be less than half the width of supporting masonry
