Q.1) Brick walls are measured in square metre if the thickness of the wall is –
A) 10 cm
B) 15 cm
C) 20 cm
D) None of the above
Q.2) The defect that is caused by falling of rain water on the hot surfaces of the bricks is known as –
Bloating : It refers to the expansion of bricks when exposed to high temperatures in a kiln.
Chuffs : It refers to the deformation in shape of bricks caused by the rain water falling on hot bricks.
Cracks : It refers to fractures or fissures on the surface of bricks. It caused due to uneven firing or drying, exposure to high temperatures or weather conditions.
Lamination : It refers to the process of adding layers of different materials to the surface of the brick to improve its performance. Lamination can also refer to the process of bonding multiple layers of clay together to create a stronger or more durable brick.
Q.3) Tempering is the process used in the manufacturing of –
Q.4) The process of providing smooth face and regular face to stones is known as –
Quarrying : It is the process of extracting stone from quarry or a natural pit. Quarrying involves drilling, blasting, and cutting large blocks of stone which can then be transported to a factory or construction site for further processing.
Seasoning : It is the process of drying or removing excess moisture of the newly quarred stone.
Pitching : It is the process of cutting or shaping a quarred stone using chisel or hammer for decorative or functional purposes.
Dressing : It refers to the process of shaping, smoothing, and finishing stone to prepare it for use in construction or other applications. Dressing typically involves using specialized tools such as saws, grinders, and polishing machines to create a precise, uniform surface on the stone.
Q.5) The calcination of pure lime results in :
A) Quick lime
B) Hydraulic lime
C) Hydrated lime
D) Fat lime
Q.6) Which of the following type of stone is used in the rubble masonry?
B) Heavy weighted
C) Light weighted
Rubble masonry is a kind of masonry that employs uncut, naturally shaped stones that are rough and irregular in shape. These stones are often collected from the area or close by and used to build a wall or other building in their original size and shape.
Rubble masonry is commonly used in traditional or historic buildings, as well as in modern construction projects that seek to achieve a rustic or natural appearance. The irregularity of the stones used in rubble masonry can create a unique visual texture that is valued for its aesthetic appeal.
Q.7) The disease of dry rot in timber is caused by :
A) Complete submergence in water
B) Alternative wet and dry conditions
C) Lack of ventilation
D) None of the above
Serpula Lacrymans, a form of fungal degradation of wood, causes dry rot. When wood gets excessively wet—more than 20% moisture content—the wood-destroying fungus attacks the timber.
The most harmful type of fungal degradation is dry rot. As it creeps across brickwork and consumes all timber in its path, including structural timbers, skirting boards, door frames, and flooring, the dry rot fungus is extremely devastating. It can harm a property if left untreated since the fungus can erode a building’s structural stability and lead to its collapse. It affects all kinds of properties, both new and old.
Q.8) Which of the following is the measure of ease with which the wood may split?
B) Shearing strength
Q.9) The defect in timber that causes longitudinal separation of woods between the annular rings is known as –
B) Rind gall
D) Twisted fibers
Q.10) Which of the following represents the moisture content in the properly seasoned timber?
A) 5 – 8%
B) 10 – 12%
C) 18 – 25%
D) 25 – 35%
Q.11) Compound of cement which reacts immediately with water and sets first is –
A) Tricalcium silicate
B) Tricalcium aluminate
C) Dicalcium silicate
D) All of the above
Q.12) Le-chatelier’s method can be used to determine –
A) Fineness of cement
B) Fineness of aggregate
C) Soundness of cement
D) Compressive strength of cement
Le-Chatelier’s method is a test used to determine the soundness of cement i.e. the ability to resist expansion or disintegration after setting to high temperature and pressure.
Q.13) Which of the following is added for quick setting of cement?
C) Zinc sulphate
D) Aluminium sulphate
Q.14) The high early strength of rapid hardening cement is due to its –
A) Increased content of gypsum
B) Burning at high temperature
C) Increased content of cement
D) Higher content of tricalcium silicate
Q.15) Soundness test of cement determines –
A) Quality of free lime
B) Ultimate strength
D) Initial setting
The soundness test is a test performed on cement to determine its ability to resist volume changes or expansion after it has set. The soundness of cement is an important property because it can affect the long-term durability and strength of concrete made with that cement.
Q.16) In the process of hydration of OPC to complete all chemical reaction, the water requirement is –
A) 5 – 8%
B) 8 – 16%
C) 20 – 25%
D) 35 – 45%
Q.17) In which of the following test of cement air permeability method is used?
A) Strength test
B) Slump test
C) Fineness test
D) Durability test
Q.18) To prevent segregation, the maximum height for placing concrete is –
A) 100 cm
B) 125 cm
C) 150 cm
D) 200 cm
Q.20) The standard size of masonry brick is –
A) 18 x 8 x 8 cm
B) 18 x 9 x 9 cm
C) 19 x 9 x 9 cm
D) 19 x 8 x 8 cm