Materials Quiz Questions And Answers

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  • 1/100 Questions

    During construction of road project, if all the materials to be used are tested for quality, inspection is no longer required?

    • True
    • False
Please wait...
About This Quiz

Materials quiz below is a detailed and comprehensive test on different construction materials and related concepts. Take on the 100 questions assessment and see how much you know and how you fair. All the best.

Materials Quiz Questions And Answers - Quiz

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  • 2. 

    The most important single factor which affects the quality of concrete is

    • Cement content

    • Aggregate gradation

    • Water-cement ratio

    • Aggregate quality

    Correct Answer
    A. Water-cement ratio
    Explanation
    The water-cement ratio is the correct answer because it is a crucial factor that determines the strength, durability, and workability of concrete. The ratio refers to the amount of water used in proportion to the amount of cement in the mixture. A higher water-cement ratio can result in weaker and more porous concrete, while a lower ratio can lead to a stronger and more durable material. Therefore, controlling and maintaining an appropriate water-cement ratio is essential for achieving high-quality concrete.

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  • 3. 

    The physical and engineering properties of soils may be improved by

    • Compaction

    • Stabilization

    • Both a and b

    • Neither a or b

    Correct Answer
    A. Both a and b
    Explanation
    Both compaction and stabilization can improve the physical and engineering properties of soils. Compaction involves reducing the air voids within the soil by applying mechanical force, which increases its density and strength. Stabilization, on the other hand, involves adding materials such as cement, lime, or chemical additives to the soil to enhance its strength, durability, and resistance to water. By combining compaction and stabilization techniques, the soil can achieve optimal properties for construction and engineering purposes.

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  • 4. 

    The density to which a soil can be compacted is related to

    • Compacted efforts

    • Water content

    • Both a and b

    • None of the preceding

    Correct Answer
    A. Both a and b
    Explanation
    The density to which a soil can be compacted is related to both compacted efforts and water content. Compacted efforts refer to the amount of force applied to the soil during compaction, which affects its density. Water content also plays a crucial role as it affects the soil's ability to compact and its overall density. Therefore, both factors, compacted efforts and water content, are important in determining the density to which a soil can be compacted.

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  • 5. 

    A soil with a Group Index of 5 is stronger than another with a Group Index of 10

    • True

    • False

    Correct Answer
    A. True
    Explanation
    A Group Index is a measure of the strength and quality of a soil. A lower Group Index indicates a stronger soil, while a higher Group Index indicates a weaker soil. In this case, the soil with a Group Index of 5 is lower than the soil with a Group Index of 10, therefore it is stronger.

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  • 6. 

    Steel bars for concrete reinforced is tested for its

    • Tensile

    • Compressive

    • Yield

    • Both a and c

    Correct Answer
    A. Both a and c
    Explanation
    Steel bars for concrete reinforcement are tested for their tensile and yield strength. Tensile strength refers to the ability of a material to resist breaking or deformation under tension, while yield strength is the maximum stress a material can withstand before it starts to deform permanently. Both these properties are important for steel bars used in concrete reinforcement as they need to withstand the tensile forces and yield without breaking or deforming. Therefore, the correct answer is "both a and c".

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  • 7. 

    The sample of 12.5mm diameter steel bar to be submitted for test should be at least

    • 20cm

    • 40cm

    • 100cm

    • None of the above

    Correct Answer
    A. 100cm
    Explanation
    The sample of 12.5mm diameter steel bar should be at least 100cm in length. This is because a longer sample allows for more accurate and representative testing. With a longer sample, there is a greater chance of capturing any variations or defects that may be present in the steel bar. Additionally, a longer sample provides more material for testing, which can help ensure reliable and consistent results. Therefore, a 100cm length is the most appropriate choice for submitting the sample for testing.

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  • 8. 

    Unless otherwise specified in the special provision, the type of portland cement used in paving concrete shall be

    • Type I

    • Type II

    • Type III

    • Type IV

    Correct Answer
    A. Type I
    Explanation
    The correct answer is type I because unless otherwise specified, type I portland cement is typically used in paving concrete.

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  • 9. 

    The degree of compaction of an embankment in our present Specifications is based on

    • CBR method

    • Unconfined compression test

    • AASHTO designation T-180

    • Bulk specific gravity

    Correct Answer
    A. AASHTO designation T-180
    Explanation
    The AASHTO designation T-180 is used as the basis for determining the degree of compaction of an embankment in our present Specifications. This designation refers to a test method developed by the American Association of State Highway and Transportation Officials (AASHTO) to measure the moisture-density relationship of soils. By using this method, engineers can determine the optimum moisture content and maximum dry density of the soil, which are crucial factors in achieving the desired level of compaction for the embankment.

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  • 10. 

    The desired property of fresh concrete is

    • Strength

    • Durability

    • Workability

    • Water tightness

    Correct Answer
    A. Workability
    Explanation
    Workability refers to the ease with which fresh concrete can be mixed, transported, placed, and compacted without segregation or excessive bleeding. It is an important property as it determines the ease of construction and the ability to achieve the desired shape and finish of the concrete. A concrete with good workability is easier to handle and manipulate, allowing for better compaction and reducing the risk of defects or voids in the final structure. Therefore, workability is a desired property of fresh concrete.

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  • 11. 

    Steel bars for concrete reinforcements is tested for its __ properties.

    • Tensile

    • Compression

    • Bending

    • Both a and c

    Correct Answer
    A. Both a and c
    Explanation
    Steel bars for concrete reinforcements are tested for their tensile properties because they need to have sufficient strength to withstand pulling forces without breaking. They are also tested for their bending properties because they need to be able to be bent and shaped without cracking or breaking. Therefore, the correct answer is "both a and c" as the steel bars need to possess both tensile and bending properties to be suitable for concrete reinforcements.

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  • 12. 

    __ is the localized upward displacement if a pavement due to swelling of the subgrade or some portion of the pavement structure.

    • Upheavel

    • Edge cracking

    • Raveling

    • Depression

    Correct Answer
    A. Upheavel
    Explanation
    Upheaval is the localized upward displacement of a pavement due to swelling of the subgrade or some portion of the pavement structure. This means that the pavement is being pushed upwards, causing a noticeable bump or rise in the surface. This can occur when the subgrade soil expands due to moisture or other factors, causing the pavement to lift and potentially crack or become uneven. Upheaval is a common issue in areas with expansive soils or fluctuating moisture levels, and it can lead to pavement damage and safety hazards if not addressed.

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  • 13. 

    For bituminous concrete mixes, the asphalt material may either be asphalt cement or asphalt emulsion

    • True

    • False

    Correct Answer
    A. True
    Explanation
    Bituminous concrete mixes can be made using either asphalt cement or asphalt emulsion as the asphalt material. Asphalt cement is a semi-solid form of petroleum that is commonly used in road construction. Asphalt emulsion, on the other hand, is a mixture of asphalt cement, water, and an emulsifying agent. It is a more environmentally friendly option as it requires less energy to produce and can be applied at lower temperatures. Therefore, the statement that the asphalt material for bituminous concrete mixes can be either asphalt cement or asphalt emulsion is true.

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  • 14. 

    Is the method used in determining the strength of concrete pipes.

    • Third point loading

    • Mid-span loading

    • Three-edge bearing

    • Fourth-point loading

    Correct Answer
    A. Three-edge bearing
    Explanation
    Three-edge bearing is the method used in determining the strength of concrete pipes. This method involves applying a load to the top of the pipe at three equally spaced points along the circumference, while the bottom of the pipe is supported on two parallel plates. The load is increased until the pipe fails or reaches its maximum load capacity. This method is commonly used in the design and testing of concrete pipes to ensure they can withstand the required load and pressure without failure.

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  • 15. 

    __ test is measure by the distance to which will elongate before breaking when two ends of a briquet with specimen are pulled apart as a specified speed and temperature.

    • Penetration

    • Solubility

    • Ductility

    • Viscosity

    Correct Answer
    A. Ductility
    Explanation
    Ductility is the correct answer because it refers to the ability of a material to deform under tensile stress, such as being pulled apart, without breaking. In this context, the test measures the distance to which the specimen will elongate before breaking when the two ends of a briquet are pulled apart at a specified speed and temperature. Ductility is an important property for materials that need to withstand stretching or bending forces without fracturing.

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  • 16. 

    A job-mix formula provides for close control of

    • Aggregate gradation

    • Asphalt content

    • Both of them

    • Neither of them

    Correct Answer
    A. Both of them
    Explanation
    A job-mix formula is a predetermined blend of aggregates and asphalt binder that is used in the production of asphalt mixtures. It is designed to provide the desired properties and performance of the asphalt pavement. By specifying the aggregate gradation and asphalt content in the job-mix formula, close control can be achieved over both of these factors during the asphalt production process. This ensures that the resulting asphalt mixture meets the required specifications and performs optimally in terms of durability, strength, and resistance to cracking and rutting.

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  • 17. 

    The efficient compaction, the embankment material should at the time of rolling be

    • Dry

    • Wet

    • At optimum moisture content

    • Neither a or b

    Correct Answer
    A. At optimum moisture content
    Explanation
    The embankment material should be at optimum moisture content during rolling for efficient compaction. This is because at optimum moisture content, the material has the ideal amount of moisture to achieve maximum compaction and density. If the material is too dry, it may not compact properly, leading to voids and reduced stability. On the other hand, if the material is too wet, it becomes difficult to compact and may result in excessive settlement and poor strength. Therefore, the correct answer is at optimum moisture content.

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  • 18. 

    The distance traveled by a standard penetration needle on a prepared sample of as[halt under conditions for normal penetration is 8.6mm. The material is ____ penetration grade.

    • 40-50

    • 85-100

    • 120-150

    • 200-300

    Correct Answer
    A. 85-100
    Explanation
    The distance traveled by a standard penetration needle on a prepared sample of asphalt under conditions for normal penetration is 8.6mm. Based on industry standards, this distance corresponds to a penetration grade of 85-100.

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  • 19. 

    Atleast one set of 3 concrete cylinder samples shall be taken from __ cu.m each class of concrete or fraction thereof, placed each day

    • 50

    • 75

    • 100

    • 150

    Correct Answer
    A. 75
    Explanation
    At least one set of 3 concrete cylinder samples shall be taken from 75 cu.m each class of concrete or fraction thereof, placed each day. This means that for every class of concrete, a set of 3 cylinder samples should be taken from a volume of 75 cubic meters or less, and this process should be repeated daily.

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  • 20. 

    ____ is the process whereby soil particles are contained more closely together through a reduction in the air voids, generally by mechanical means.

    • Soil compaction

    • Mechanical analysis

    • In-place unit weigh

    • CBR

    Correct Answer
    A. Soil compaction
    Explanation
    Soil compaction is the process of reducing the air voids between soil particles through mechanical means. This can be achieved by applying pressure or using equipment to compress the soil, resulting in increased density. Compacted soil has improved stability, load-bearing capacity, and reduced permeability. It is commonly used in construction projects to ensure a solid foundation for buildings, roads, and other structures.

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  • 21. 

    ___ is the best type of asphalt to be used for hot mixes.

    • Asphalt cement

    • Emulsified asphalt

    • Rapid curing

    • Medium curing cut-back

    Correct Answer
    A. Asphalt cement
    Explanation
    Asphalt cement is the best type of asphalt to be used for hot mixes because it is a pure form of asphalt that is highly viscous and provides excellent binding properties. It is commonly used in hot mix asphalt (HMA) production as it ensures durability, stability, and resistance to weathering. Asphalt cement is also known for its high temperature susceptibility, making it the ideal choice for hot mix applications where high temperatures are involved. Emulsified asphalt, rapid curing, and medium curing cut-back are not as suitable for hot mixes as asphalt cement.

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  • 22. 

    A bituminous coating applied in an existing road prior to laying of a bituminous surface overlay is 

    • Prime coat

    • Tack coat

    • Surface coat

    • Seal coat

    Correct Answer
    A. Tack coat
    Explanation
    A tack coat is a bituminous coating applied to an existing road before laying a bituminous surface overlay. It is used to create a bond between the existing pavement and the overlay, ensuring that the new layer adheres properly to the old surface. The tack coat helps prevent slippage and separation between the layers, improving the overall durability and longevity of the road.

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  • 23. 

    Concrete mix should be in place __ minutes after the cement is added into the aggregate and water.

    • 100

    • 120

    • 15

    • 90

    Correct Answer
    A. 90
    Explanation
    Concrete mix should be in place 90 minutes after the cement is added into the aggregate and water. This means that once the cement is added, the concrete mix should be used within 90 minutes to ensure proper setting and curing. Waiting longer than 90 minutes can result in the concrete losing its workability and becoming difficult to place and finish.

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  • 24. 

    _____ is the method used in determining the strenght of concrete pipe.

    • Third point loading

    • Three-edge bearing test

    • Mid span loading

    • None of the above

    Correct Answer
    A. Three-edge bearing test
    Explanation
    The three-edge bearing test is used to determine the strength of a concrete pipe. This test involves applying a load to the top of the pipe while it is supported on three edges. The test measures the ability of the pipe to withstand external pressure and determines its load-carrying capacity. This method is commonly used in the construction industry to ensure the durability and reliability of concrete pipes.

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  • 25. 

    The sample of RSB to be submitted for test should be atleast 

    • 20cm

    • 40cm

    • 50cm

    • 100cm

    Correct Answer
    A. 100cm
    Explanation
    The sample of RSB to be submitted for test should be at least 100cm because it is the largest measurement among the given options. This suggests that a larger sample size is required for the test, possibly to ensure accurate and representative results.

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  • 26. 

    _____ of 12.5mm diameter steel bar for concrete reinforcement is the maximum quantity that a sample can represent

    • 15,000 kg

    • 10,000 kg

    • 5,000 kg

    • 12,500 kg

    Correct Answer
    A. 10,000 kg
    Explanation
    The given question is asking for the maximum quantity that a sample of a 12.5mm diameter steel bar for concrete reinforcement can represent. The correct answer is 10,000 kg. This means that a sample of 10,000 kg of the steel bar can accurately represent the properties and characteristics of the entire batch or population of steel bars with the same diameter.

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  • 27. 

    The field density of a bituminous pavement shall not be less than __ of the specific gravity of the laboratory compacted specimen.

    • 92%

    • 95%

    • 98%

    • 99%

    Correct Answer
    A. 95%
    Explanation
    The field density of a bituminous pavement should be at least 95% of the specific gravity of the laboratory compacted specimen. This means that the density of the pavement in the field should be at least 95% of the density achieved in the laboratory. This ensures that the pavement is properly compacted and has the necessary strength and durability. A higher field density indicates better compaction and overall quality of the pavement.

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  • 28. 

    Requirement of PCCP construction

    • Opening to traffic after 14 days the concrete was placed

    • Opening to traffic after 28 days the concrete was placed

    • A compressive strength of 25.08 Mpa or more

    • None of the above

    Correct Answer
    A. Opening to traffic after 14 days the concrete was placed
    Explanation
    The requirement of PCCP (Portland Cement Concrete Pavement) construction is to open the pavement to traffic after 14 days the concrete was placed. This means that after the concrete has been poured and allowed to cure for 14 days, it should be strong enough to withstand the weight and pressure of traffic. This requirement ensures that the concrete has achieved sufficient strength and durability to support vehicular loads without causing any damage or premature deterioration. It is important to follow this guideline to ensure the long-term performance and durability of the pavement.

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  • 29. 

    If an asphalt pavement will be constructed over an old existing concrete pavement ___ should be applied to the concrete pavement.

    • Prime coat

    • Tack coat

    • Seal coat

    • Mortar coat

    Correct Answer
    A. Tack coat
    Explanation
    When constructing an asphalt pavement over an old existing concrete pavement, a tack coat should be applied to the concrete pavement. A tack coat is a thin layer of asphalt emulsion that is sprayed onto the existing pavement surface. It helps to create a bond between the old and new pavement layers, ensuring better adhesion and preventing the new asphalt layer from separating or delaminating from the concrete pavement. This improves the overall durability and performance of the asphalt pavement.

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  • 30. 

    Quality determination of concrete coarse aggregate sample requires

    • Abrasion test

    • Sieve analysis

    • Stability

    • Both a and b

    Correct Answer
    A. Both a and b
    Explanation
    To determine the quality of concrete coarse aggregate, both the abrasion test and sieve analysis are required. The abrasion test measures the resistance of the aggregate to wear and tear, which is important for ensuring durability and longevity of the concrete. On the other hand, sieve analysis is used to determine the particle size distribution of the aggregate, which is crucial for achieving the desired strength and workability of the concrete mixture. Therefore, both tests are necessary to assess the quality of the coarse aggregate sample accurately.

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  • 31. 

    Prestressed concrete structures uses concrete of class

    • A

    • B

    • C

    • P

    Correct Answer
    A. P
    Explanation
    Prestressed concrete structures use concrete of class P, which refers to high-strength concrete. This type of concrete is specifically designed to withstand the high tension forces that occur in prestressed structures. The use of high-strength concrete allows for the creation of thinner and lighter structural elements, while still maintaining the required strength and durability. By pre-stressing the concrete, using techniques such as tensioning steel cables, the structure becomes more resistant to cracking and deformation under load. Therefore, class P concrete is the appropriate choice for prestressed concrete structures.

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  • 32. 

    Aggregate base course with a volume of 112,000 cu.m will have a minimum number of __ quality tests.

    • 74

    • 75

    • 56

    • 62

    Correct Answer
    A. 75
    Explanation
    Aggregate base course is a crucial component in construction projects, providing stability and support to the overall structure. To ensure the quality of the base course, it is necessary to conduct quality tests. The given question states that there is a volume of 112,000 cu.m of aggregate base course. As per industry standards, a minimum number of quality tests are required to be conducted to ensure the consistency and reliability of the material. Therefore, the correct answer is 75, indicating that 75 quality tests should be performed on the aggregate base course.

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  • 33. 

    Concrete Hollow Blocks are tested for its 

    • Compression

    • Absorption and dimension

    • Tensile

    • Both a and b

    Correct Answer
    A. Both a and b
    Explanation
    Concrete Hollow Blocks are tested for both compression and absorption. Compression testing is done to determine the strength of the blocks and their ability to withstand loads. Absorption testing, on the other hand, checks the ability of the blocks to absorb water, as excessive water absorption can lead to structural damage. Additionally, the dimension of the blocks is also tested to ensure that they meet the required specifications. Therefore, both compression and absorption, as well as dimension, are important factors to consider when testing Concrete Hollow Blocks.

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  • 34. 

    Indicated the safe working temperature of the asphalt.

    • Distillation

    • Viscosity

    • Flash point

    • Softening point

    Correct Answer
    A. Flash point
    Explanation
    The flash point is the temperature at which a substance, in this case asphalt, emits enough vapor to ignite when exposed to an open flame or spark. It indicates the minimum temperature at which the asphalt can be safely used without the risk of combustion. Therefore, knowing the flash point is crucial for determining the safe working temperature of the asphalt.

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  • 35. 

    Disturbed samples may be used for

    • Sieve test

    • Liquid limit

    • Compaction test

    • Any of the preceding

    Correct Answer
    A. Any of the preceding
    Explanation
    Disturbed samples may be used for any of the preceding tests mentioned, which include sieve test, liquid limit, and compaction test. This means that disturbed samples can be utilized for conducting any of these tests, depending on the specific requirements of the study or analysis being carried out.

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  • 36. 

    ____ is an asphalt formed by natural process of evaporation.

    • Rock asphalt

    • Asphalt emulsion

    • Asphalt cement

    • Cutback asphalt

    Correct Answer
    A. Rock asphalt
    Explanation
    Rock asphalt is formed through a natural process of evaporation. This occurs when petroleum or bitumen seeps out of the ground and is exposed to the air, causing the lighter components to evaporate and leaving behind a solid, asphalt-like material. Rock asphalt is commonly found in areas where petroleum deposits are present, such as oil sands or oil shale formations. It is often used as a paving material due to its natural occurrence and durability.

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  • 37. 

    Normally, concrete mix with __ water-cement ratio will develop the lowest strength

    • 0.75

    • 0.35

    • 0.50

    • 0.45

    Correct Answer
    A. 0.75
    Explanation
    A concrete mix with a higher water-cement ratio will have a lower strength. This is because excess water in the mix leads to more voids and weakens the overall structure. A water-cement ratio of 0.75 indicates a higher proportion of water compared to cement, resulting in a weaker concrete mix.

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  • 38. 

    Concrete specimen molded in a 6"x6"x21" beam should be rodded

    • 60

    • 61

    • 62

    • 63

    Correct Answer
    A. 63
    Explanation
    When molding a concrete specimen in a 6"x6"x21" beam, it is necessary to rod the concrete. Rodding refers to the process of using a rod or vibrator to remove air bubbles and ensure proper compaction of the concrete. This is important because trapped air can weaken the concrete and lead to structural issues. Therefore, the correct answer is 63, indicating that rodding is required for this type of concrete specimen.

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  • 39. 

    The coarser the fine aggregate, the higher the fineness modulus

    • Yes

    • No

    • Depends on grading test

    • Maybe

    Correct Answer
    A. Yes
    Explanation
    The fineness modulus is a measure of the fineness or coarseness of the aggregate particles. It is calculated by summing up the cumulative percentages of the aggregate retained on each sieve and dividing it by 100. A higher fineness modulus indicates a coarser aggregate, while a lower fineness modulus indicates a finer aggregate. Therefore, if the fine aggregate is coarser, it will have a higher fineness modulus.

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  • 40. 

    Roadway embankment in earth material shall be placed and compacted in horizontal layers not exceeding__ loose requirement, before the next layer is placed.

    • 150mm

    • 200mm

    • 100mm

    • 250mm

    Correct Answer
    A. 200mm
    Explanation
    Roadway embankment in earth material should be placed and compacted in horizontal layers of 200mm thickness before the next layer is placed. This thickness ensures proper compaction and stability of the embankment. If the layers were thinner, it could lead to insufficient compaction and potential settlement issues. On the other hand, if the layers were thicker, it would be more difficult to achieve the required compaction, resulting in a less stable embankment. Therefore, 200mm is the appropriate thickness for the placement and compaction of roadway embankment layers.

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  • 41. 

    The aggregate base course of 23750 cu.m will require__ quality test

    • 50

    • 20

    • 16

    • 12

    Correct Answer
    A. 16
    Explanation
    The aggregate base course of 23750 cu.m will require 16 quality tests. The number of quality tests required is determined by the volume of the aggregate base course. In this case, the volume is 23750 cu.m, and based on industry standards, a quality test is typically conducted for every 1500 cu.m of material. Therefore, 23750 cu.m divided by 1500 cu.m equals 15.83, which rounds up to 16 quality tests.

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  • 42. 

    Extraction test is the procedure used for separating

    • The asphalt from water in emulsified asphalt

    • Asphalt from mineral aggregates

    • Asphalt from kerosene solvent

    • Asphalt from gasoline solvent

    Correct Answer
    A. Asphalt from mineral aggregates
    Explanation
    The extraction test is a procedure used to separate asphalt from mineral aggregates. This process involves dissolving the asphalt in a solvent and then filtering it to separate the asphalt from the aggregates. This test is commonly used in the construction industry to determine the asphalt content in asphalt mixtures and ensure the quality and performance of the asphalt materials used in road construction.

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  • 43. 

    An embankment to be constructed to a height of 600mm will have a minimum number of __ layers.

    • 4

    • 5

    • 3

    • 6

    Correct Answer
    A. 3
    Explanation
    To construct an embankment to a height of 600mm, there needs to be a minimum of 3 layers. Each layer will contribute a certain height to the embankment, and by having 3 layers, the total height will reach 600mm. If there were only 2 layers, the height would be less than 600mm, and if there were 4 layers, the height would exceed 600mm. Therefore, the correct answer is 3.

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  • 44. 

    In cutback asphalt, medium curing type is a combination of the following

    • Asphalt cement and road oils

    • Asphalt cement and kerosene

    • Asphalt cement and gasoline

    • Asphalt cement and emulsifier

    Correct Answer
    A. Asphalt cement and kerosene
    Explanation
    Cutback asphalt is a type of asphalt that is mixed with a solvent to make it easier to work with and apply. The medium curing type of cutback asphalt is a combination of asphalt cement and kerosene. The kerosene acts as the solvent, helping to reduce the viscosity of the asphalt cement and making it more fluid. This allows for easier mixing and application of the asphalt.

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  • 45. 

    Which plasticity index is most suitable for aggregate base course?

    • 5

    • 10

    • 15

    • 50

    Correct Answer
    A. 5
    Explanation
    A plasticity index of 5 is most suitable for aggregate base course. This is because a lower plasticity index indicates that the material has less clay content, which is desirable for the aggregate base course. Clay can cause the material to become too cohesive and susceptible to swelling and shrinkage, leading to potential damage and instability. Therefore, a plasticity index of 5 ensures that the material has a minimal clay content, making it suitable for the aggregate base course.

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  • 46. 

    Paving concrete will need less ____ than that of structure concrete.

    • Sand

    • Water

    • Coarse aggregate

    • Both a and b

    Correct Answer
    A. Both a and b
    Explanation
    Paving concrete will need less sand and water compared to structural concrete. This is because paving concrete is typically designed to have a lower water-to-cement ratio and a lower sand content, allowing it to be more workable and easier to place. Additionally, paving concrete is often subjected to less stress and load compared to structural concrete, so it requires less coarse aggregate for strength. Therefore, both sand and water are needed in lesser quantities for paving concrete.

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  • 47. 

    For 250 gallons of Red Lead Paint __ samples should be submitted for quality test.

    • 1

    • 2

    • 3

    • 4

    Correct Answer
    A. 3
    Explanation
    For 250 gallons of Red Lead Paint, 3 samples should be submitted for quality test. This is because taking multiple samples ensures a more accurate representation of the overall quality of the paint batch. With 3 samples, any potential variations or inconsistencies in the paint can be identified and addressed before it is used on a larger scale.

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  • 48. 

    The specified flexural strength for paving concrete is

    • 350

    • 400

    • 525

    • 300

    Correct Answer
    A. 525
    Explanation
    The specified flexural strength for paving concrete is 525. This means that the concrete used for paving needs to have a minimum flexural strength of 525 pounds per square inch (psi) in order to withstand the stresses and loads that it will be subjected to. Flexural strength is a measure of a material's ability to resist deformation under bending, and in the case of paving concrete, it is crucial to ensure that it is strong enough to withstand the weight of vehicles and other external forces. Therefore, a flexural strength of 525 psi is the correct specification for paving concrete.

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  • 49. 

    Soils containing more than 35% passing 0.075mm (#200) sieve are classified under

    • Silty-clay materials

    • Granular materials

    • Both a and b

    • It depends on the plasticity index

    Correct Answer
    A. Silty-clay materials
    Explanation
    Soils containing more than 35% passing 0.075mm (#200) sieve are classified as silty-clay materials. This classification is based on the particle size distribution of the soil. Silty-clay materials have a high percentage of fine particles, which are smaller than 0.075mm in size. This classification is important in understanding the properties and behavior of the soil, as silty-clay materials have specific characteristics and can have different engineering implications compared to other types of soils.

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Quiz Review Timeline (Updated): Sep 2, 2023 +

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  • Current Version
  • Sep 02, 2023
    Quiz Edited by
    ProProfs Editorial Team
  • Aug 15, 2016
    Quiz Created by
    Matthewsdizon
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