ⓐ Fine aggregate ⓑ Admixtures ⓒ Binding material ⓓ All of the above
➤ Binding material
The binding material binds fine and coarse aggregate.
Fine aggregates fill the space in the coarse aggregate.
Admixtures affect the setting time of cement.
2➤ For a compressive strength of 3000 psi, the lightweight cement content is ____ pounds per cubic yard.
ⓐ 730-750 ⓑ 400-590 ⓒ 430-560 ⓓ 440-560
➤ 440-560
Compressive strengths of 3000 psi requires 440-560 pounds per cubic yard,
while compressive strengths of 2500 psi require 400-510 pound per cubic yard
3➤ What is the importance of the Standard Consistency Test?
ⓐ It is used to determine the quality of water ⓑ It is used to determine the quality of cemen ⓒ It is used to determine the quality of aggregates ⓓ None of the above
➤ It is used to determine the quality of water
This test is used to assess how much water is needed to make a standard or typical consistency cement paste.
This test also helps to determine soundness, compressive strengths and setting time of the cement.
4➤ A rectangular bar of width b and height h is being used as a cantilever. The loading is in a plane parallel to the side b. The section modulus is
ⓐ bh3/12 ⓑ b2h/6 ⓒ bh2/6 ⓓ none of these.
➤ b2h/6
5➤ As compared to uniaxial tension or compression, the strain energy stored in bending is only
ⓐ 1/3 ⓑ 2/3 ⓒ 1/5 ⓓ 4/3
➤ 1/3
6➤ The weakest section of a diamond riveting, is the section which passes through
ⓐ second row ⓑ central raw ⓒ first row ⓓ one rivet hole of end row.
➤ first row
7➤ Which of the following cement is used in sewage and water treatment plants?
Sulphate resistance is excellent in cement with composition. This type of cement is utilized in the construction of foundations on soils with high sulphate levels in the subsoil.
8➤ Which of the following cement is used for interior and exterior decorative works? a) b) c) d)
Colored cement is made by mixing 5-10% mineral pigments into Portland cement during the grinding process.
The color added to the cement can fade but the cement retains its workability and durability.
9➤ Which of the following ratio is also known as water-cement ratio?
ⓐ Density of cement to the Density of cement ⓑ Weight of water to the weight of aggregates ⓒ Weight of water to the weight of cement ⓓ Volume of cement to the volume of cement
➤ Weight of water to the weight of cement
The water–cement ratio is the weight of water in a concrete mix divided by the weight of cement.
The strength of concrete is proportional to the Cement water ratio and inversely proportional to the w/c ratio.
10➤ In a loaded beam, the point of con-traflexture occurs at a section where
ⓐ bending moment is minimum ⓑ bending moment is zero or changes sign ⓒ shearing force is maximum ⓓ shearing force is minimum.
➤ bending moment is zero or changes sign
11➤ How many layers of concrete are needed to fill a slump cone?
ⓐ 5 layers by volume ⓑ 3 equal layers by volume ⓒ 3 equal layers by height ⓓ 5 layers
➤ 3 equal layers by volume
12➤ What is the total percentage of aggregates in concrete in terms of volume?
ⓐ 65-80% ⓑ 60-75% ⓒ 90% ⓓ 40%
➤ 60-75%
Aggregates are split into two groups, accounting for 60-75 percent of the total volume of concrete. Gravels, crushed stone, Natural gravel, and sand, etc. are the aggregates of the concrete
13➤ Crushed stone, gravel, and ordinary sand are examples of which type of cement aggregate?
ⓐ Heavy-weight aggregate ⓑ Normal-weight aggregate ⓒ Lightweight aggregate ⓓ Both Normal-weight and Heavy-weight aggregate
➤ Normal-weight aggregate
Normal weight aggregates include crushed stone, gravel, and regular sand. They’re widely utilized in the production of regular and asphalt concrete, and highway sub-base.
14➤ The form work is usually removed after ________ for walls, columns, and the vertical faces of all structural components.
ⓐ 24 hours ⓑ 72 hours ⓒ 24 to 48 hours ⓓ 56 hours
➤ 24 to 48 hours
In all circumstances, 3/7 of the aforesaid period will suffice for rapid hardening cement, with the exception of vertical sides of slabs, beams, and columns, which should be held for 24 hours.
15➤ What are Plasticizers?
ⓐ Which oxidizes water for workability ⓑ Which decreases workability at the same water content ⓒ Which reduces water for workability ⓓ Which adds water for workability
➤ Which reduces water for workability
Organic compounds, or mixtures of organic and inorganic chemicals, that allow for a lower water content for given workability, or provide better workability for the same water content.
16➤ Which of the following is used to test the Standard consistency of cement?
ⓐ Soundness meter ⓑ Duff Abrams apparatus ⓒ Vicat apparatus ⓓ Le Chatalier apparatus
➤ Vicat apparatus
The standard consistency of a cement paste is described as that which allows the vicat’s plunger to penetrate to a depth of 5 to 7mm from the vicat mould’s bottom
17➤ For a compressive strength of 4000 psi, the light weight cement content is ________ pounds per cubic yard.
ⓐ 440-560 ⓑ 530-660 ⓒ 630-750 ⓓ 740-840
➤ 530-660
The lightweight cement content for compressive strengths is 4000 psi is 530-660 pounds per cubic yard, whereas compressive strengths of 2500 psi are 400-510 pounds per cubic yard.
18➤ Which of the following is not a type of Non-destructive testing?
ⓐ Eddy current testing ⓑ Compression testing ⓒ Ultrasonic test ⓓ Visual testing
➤ Ultrasonic test
Destructive testing, such as compression testing, is a sort of destructive testing. This test is performed to assess how metals react when compressed. Non-destructive testing includes methods such as visual inspection, ultrasonic inspection, and eddy current testing.
19➤ Which of the following property of a substance that resists abrasion or scratching that causes penetration or indentation?
ⓐ Hardness ⓑ Stiffness ⓒ Strength ⓓ Toughness
➤ Hardness
Hardness is the property of a material that resists penetration or indentation by abrasion or scratching
20➤Which of the following is a discontinuity that occurs during the casting of molten metal and is caused by splashing, surging, or interrupted pouring?
ⓐ Flaking ⓑ Blow hole ⓒ Burst ⓓ Cold shut
➤ Cold shut
Cold shut refers to a discontinuity in molten metal casting that can be generated by splashing, surging, halted pouring, or the meeting of two streams of metal coming from separate directions.
