Construction Materials and Building Technology MCQs (Part-9)
Which of the following is a key ingredient in mortar?
A Cement
B Lime
C Wood
D Steel
Cement is a key ingredient in mortar, acting as the binder that holds the sand and water together, providing strength and durability to the masonry. It ensures that bricks or stones bond securely.
What is the main purpose of formwork in concrete construction?
A To improve appearance
B To reinforce concrete
C To shape and support concrete
D To strengthen concrete
Formwork is a temporary structure used to mold concrete into the desired shape. It supports the concrete while it sets and hardens, ensuring that it retains its structural integrity.
Which type of cement is commonly used for general construction?
A Sulphate Resistant Cement
B Ordinary Portland Cement (OPC)
C White Cement
D Rapid Hardening Cement
Ordinary Portland Cement (OPC) is the most common type of cement used for general construction purposes. It is versatile, reliable, and cost effective, suitable for most structural applications.
Which material is used to improve the workability of concrete?
A Aggregate
B Water
C Steel
D Admixtures
Admixtures are added to concrete to enhance its properties, such as workability, setting time, and durability. They can improve the flow of concrete, reduce water content, or adjust curing times.
What is the most common type of reinforcement used in concrete?
A Steel bars
B Aluminum
C Wood
D Bamboo
Steel bars (rebar) are commonly used to reinforce concrete. They provide tensile strength, which concrete alone cannot provide, helping prevent cracks and improving the overall structural integrity.
What is the standard size of a modular brick?
A 250 mm x 120 mm x 75 mm
B 190 mm x 90 mm x 90 mm
C 230 mm x 110 mm x 70 mm
D 200 mm x 100 mm x 100 mm
The standard size of a modular brick is 190 mm x 90 mm x 90 mm. This size ensures uniformity in construction, making it easier to calculate and lay bricks for wall construction.
Which of the following is a sustainable building material?
A Lead
B PVC
C Fly Ash
D Asbestos
Fly ash is a sustainable building material that reduces the need for cement in concrete production. It is a byproduct of coal combustion, which is repurposed to enhance concrete’s strength and durability.
What is the purpose of using reinforcement detailing in construction?
A To increase weight
B To reduce construction time
C To improve aesthetics
D To ensure correct placement of reinforcement
Reinforcement detailing specifies the size, shape, and placement of steel bars within concrete structures. Proper detailing ensures the concrete can resist tensile forces and prevents structural failure.
Which material is used to increase the strength of mortar?
A Cement
B Water
C Sand
D Lime
Cement is used to increase the strength of mortar. It binds the sand and water together, forming a solid matrix that provides strength, durability, and adhesion between bricks or stones.
What is the primary purpose of curing concrete?
A To reduce weight
B To allow proper hydration and strength gain
C To increase setting time
D To improve aesthetic quality
Curing helps maintain moisture levels in concrete, allowing the cement to hydrate and gain strength. Proper curing prevents cracks and ensures the concrete reaches its full potential in strength and durability.
Which material is commonly used for waterproofing roofs?
A Cement
B Pumice
C Bitumen
D Lime
Bitumen is a highly effective material used for waterproofing roofs. It forms a durable, flexible, and waterproof barrier that prevents water from infiltrating the structure, protecting it from damage.
Which type of steel is commonly used for reinforcement?
A Copper
B High Carbon Steel
C Stainless Steel
D Mild Steel
Mild steel is commonly used for reinforcement due to its ductility, which allows it to bend without breaking. It bonds well with concrete, providing the necessary tensile strength to prevent cracking.
What type of aggregate is used for lightweight concrete?
A Pumice
B Gravel
C Sand
D Crushed stone
Pumice is a lightweight aggregate used in concrete. It reduces the overall weight of the concrete while maintaining good strength and insulation properties, making it suitable for lightweight concrete applications.
What is the purpose of using formwork in concrete construction?
A To reinforce concrete
B To shape and support concrete
C To add color
D To improve surface texture
Formwork provides temporary support for wet concrete until it hardens. It shapes the concrete into the desired form, such as beams, columns, or slabs, and ensures structural stability during curing.
Which material is primarily used in the production of bricks?
A Cement
B Sand
C Clay
D Lime
Clay is the primary material used in brick production. It is mixed with water, molded into shape, and fired in a kiln to produce durable, strong bricks for use in construction.