Building Technology 3 Division 3 Concrete

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  • 1/83 Questions

    The objective is to continuously attract the termite workers to forage on aslow-acting insect-growth regulator (IGR) called hexaflumuron to eliminate the entireworkers population and the entire colony. The system employs baits and monitoringdevices installed where evidence of infestation is found

    • Bait System:
    • Vertical barriers
    • Horizontal Barriers
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Building Technology 3 Division 3 Concrete - Quiz
About This Quiz

The type of concrete you use varies with the purpose of the building and if not used correctly can lead to collapse of the building. Have you just covered division 3 on concrete under the building technology 3 class? Take up the test below and see how much of it you understand so far.

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  • 2. 

    \Concrete strengthened by having steel embedded in its called _________concrete. 

    • Reinforced

    • Light weight

    • Mass concrete

    • Aerated

    Correct Answer
    A. Reinforced
    Explanation
    Concrete strengthened by having steel embedded in it is called reinforced concrete. This type of concrete is commonly used in construction due to its increased strength and durability. The steel reinforcement helps to provide additional tensile strength to the concrete, allowing it to withstand greater loads and resist cracking. Reinforced concrete is widely used in the construction of buildings, bridges, and other structures where strength and stability are crucial.

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  • 3. 

    Used to speed up setting time and to develop earlier strength to reducelength of time for protection. Principal ingredients of accelerators are calcium chloride.Maximum amount added is 2 lbs. per bag of cement. Accelerators have disadvantages inthat they increase the expansion and contraction of concrete; reduce resistance to sulfateattack, and increases efflorescence and corrosion of high tension steels.

    • Accelerators

    • Retarders

    • Air-entraining agents

    • Colored pigments

    Correct Answer
    A. Accelerators
    Explanation
    Accelerators are used to speed up the setting time and develop earlier strength in concrete, which helps to reduce the length of time needed for protection. The principal ingredient of accelerators is calcium chloride, and the maximum amount that can be added is 2 lbs. per bag of cement. However, accelerators have some disadvantages, such as increasing the expansion and contraction of concrete, reducing resistance to sulfate attack, and increasing efflorescence and corrosion of high tension steels.

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  • 4. 

    When one or more courses or layers of asphalt an asphaltleveling course made of an asphalt and aggregate mixture of variable thickness tocorrect the contour of existing surface, are placed on existing pavement.

    • ASPHALT OVERLAY

    • HOT MIX ASPHALT or ASPHALTIC CONCRETE

    • COLD MIX ASPHALT OR ASPHALTIC CONCRETE

    Correct Answer
    A. ASPHALT OVERLAY
    Explanation
    An asphalt overlay is a process where one or more courses or layers of asphalt, known as an asphalt leveling course, are placed on top of an existing pavement to correct the contour of the surface. This overlay is made of an asphalt and aggregate mixture with a variable thickness. It is a commonly used method to improve the condition and smoothness of existing roads or pavements. The other options, hot mix asphalt or asphaltic concrete, and cold mix asphalt or asphaltic concrete, are types of asphalt materials used in the overlay process.

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  • 5. 

    Good quality concrete is obtained through:

    • Careful selection of materials

    • Correct proportioning

    • Thorough mixing and careful transporting and placing

    • Proper curing or protection of the concrete after it is placed

    • All of the above mentioned

    Correct Answer
    A. All of the above mentioned
    Explanation
    Good quality concrete is obtained through a combination of factors. Careful selection of materials ensures that the components used in the concrete are of high quality and suitable for the desired strength and durability. Correct proportioning involves accurately measuring and combining the materials in the right ratios to achieve the desired concrete mix. Thorough mixing ensures that all the components are evenly distributed, resulting in a uniform and homogenous mixture. Careful transporting and placing of the concrete ensures that it is not compromised during transportation and is properly positioned in the desired location. Finally, proper curing or protection of the concrete after it is placed allows it to gain strength and durability over time. Therefore, all of the above mentioned factors contribute to obtaining good quality concrete.

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  • 6. 

    Steel mesh product that is fine enough to keep even tiny termites from passing through it.Termite Mesh is used in slab construction, also used to wrap pipes and other accessareas.

    • Vertical barriers

    • Termite Resistant Sand

    • Termite Mesh

    Correct Answer
    A. Termite Mesh
    Explanation
    Termite Mesh is the correct answer because it is a steel mesh product that is fine enough to prevent even tiny termites from passing through it. It is commonly used in slab construction to create a barrier against termites and is also used to wrap pipes and other access areas to prevent termite infestation.

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  • 7. 

    Formed by grading and compacting layers of crushedstone or gravel, then binding the top layer with asphalt to stabilize the stone, provide a smoother surface, and seal against water penetration.

    • COLD MIX ASPHALT OR ASPHALTIC CONCRETE

    • ASPHALTIC MACADAM

    • HOT MIX ASPHALT or ASPHALTIC CONCRETE

    Correct Answer
    A. ASPHALTIC MACADAM
    Explanation
    Asphaltic macadam is the correct answer because it is a type of road surface that is formed by grading and compacting layers of crushed stone or gravel, and then binding the top layer with asphalt. This process helps to stabilize the stone, provide a smoother surface, and seal against water penetration. Cold mix asphalt or asphaltic concrete and hot mix asphalt or asphaltic concrete are also types of road surfaces, but they do not specifically mention the use of crushed stone or gravel in their formation.

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  • 8. 

     (an aggregate smaller than ¼” in size) consists of sand, stonescreenings or other inert materials of similar characteristics.

    • Fine aggregates

    • Course Aggregates

    • Silica made Aggregates

    • Alumina Aggregates

    Correct Answer
    A. Fine aggregates
    Explanation
    Fine aggregates are smaller than ¼” in size and consist of sand, stonescreenings, or other inert materials with similar characteristics. These aggregates are commonly used in construction projects to create a smooth and cohesive mixture. They help to fill the voids between larger coarse aggregates, providing stability and strength to the overall structure. Fine aggregates also improve the workability of concrete and mortar, making them easier to shape and mold. Additionally, they contribute to the durability and long-term performance of the construction materials.

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  • 9. 

    Before placing concrete, this consideration must take placed.

    • The forms shall be cleaned and inspected

    • Surfaces wetted or oiled

    • Reinforcement properly secured

    • All of the above

    Correct Answer
    A. All of the above
    Explanation
    Before placing concrete, several considerations must take place. The forms need to be cleaned and inspected to ensure they are in good condition and free from any debris or damage. Additionally, the surfaces need to be wetted or oiled to prevent the concrete from sticking to them. Lastly, the reinforcement needs to be properly secured to provide structural strength to the concrete. Therefore, all of the above options are correct and necessary steps to be taken before placing concrete.

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  • 10. 

    In mixing concrete Water should be free from what?

    • Oil

    • Acid

    • Alkali

    • Vegetable matter

    • All of the above

    Correct Answer
    A. All of the above
    Explanation
    In mixing concrete, it is important for the water to be free from oil, acid, alkali, and vegetable matter. Oil can interfere with the bonding of the concrete, while acid and alkali can affect the chemical reactions and weaken the structure. Vegetable matter can introduce organic compounds that may decompose and lead to deterioration over time. Therefore, to ensure the quality and strength of the concrete, it is necessary to avoid using water contaminated with any of these substances.

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  • 11. 

    Used during very hot weather to slow down the hydration of the cement.Principal ingredients of retarders include zinc oxide, calcium lignosulfonate, andderivatives of adipic acid. The use of retarders may cause some loss of early strength andwill therefore require careful control and more frequent slump tests. Retarders alsoreduce the expansion and contraction of concrete.

    • Retarders,

    • Colored pigments

    • Accelerators

    • Air-entraining agents

    Correct Answer
    A. Retarders,
    Explanation
    Retarders are used during very hot weather to slow down the hydration of the cement. They contain principal ingredients such as zinc oxide, calcium lignosulfonate, and derivatives of adipic acid. While retarders can help in preventing the concrete from setting too quickly in hot temperatures, they may cause some loss of early strength. Therefore, careful control and more frequent slump tests are required. Additionally, retarders also reduce the expansion and contraction of concrete.

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  • 12. 

    Almost always applied during construction to the soil and foundation; or the use of termiteresistant building products, from drywall to floor joists treated with borates before use inhome construction.

    • Pre-construction chemical barriers

    • Vertical barriers

    • Horizontal barriers

    Correct Answer
    A. Pre-construction chemical barriers
    Explanation
    Pre-construction chemical barriers refer to the application of chemicals to the soil and foundation before construction begins. This is done to prevent termite infestations and protect the building from termite damage. These barriers act as a deterrent for termites, preventing them from accessing the structure. By treating the soil and foundation with termiticides, the risk of termite infestation is greatly reduced, ensuring the longevity and safety of the building.

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  • 13. 

    Are mainly used to give color to concrete floors. There are two types:  Dry-cast, broadcast or dust-on, for surface coloring. They are dusted on, usually intwo coats; after all surface water has disappeared. The surface is then finished with asteel trowel.

    • Hydrated lime

    • Colored pigments

    • Waterproofing compounds

    • Accelerators

    Correct Answer
    A. Colored pigments
    Explanation
    Colored pigments are mainly used to give color to concrete floors. They are dusted on in two coats after all surface water has disappeared. The surface is then finished with a steel trowel. This suggests that colored pigments are the type of material used for surface coloring in concrete floors, as mentioned in the given information.

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  • 14. 

    The objective is to establish a continuous termiticide barrier betweensoil access routes and the structure, either killing or repeling subterranean termites thatattempt to reach the structure. A termiticide is a type of chemical used to control termites.

    • Chemical Barriers:

    • Physical Barriers

    • Bait System:

    Correct Answer
    A. Chemical Barriers:
    Explanation
    Chemical barriers are used to establish a continuous termiticide barrier between soil access routes and the structure. This barrier is meant to either kill or repel subterranean termites that try to reach the structure. Termiticides are a type of chemical specifically designed to control termites. Therefore, chemical barriers are an effective method for preventing termite infestations and protecting structures from termite damage.

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  • 15. 

    Trenches are dug around the foundation, termiticide applied and the trench filled back in. Chemicals may also be injected into the soil in the crawl space/basement and around the foundation.

    • Basements and Crawl Spaces

    • Vertical barriers

    • Slab treatment

    Correct Answer
    A. Basements and Crawl Spaces
    Explanation
    The correct answer is Basements and Crawl Spaces. This answer is supported by the information given in the question, which mentions that chemicals may be injected into the soil in the crawl space/basement and around the foundation. This indicates that basements and crawl spaces are areas where termiticide treatment is commonly applied. Additionally, the mention of trenches being dug around the foundation suggests that termiticide may also be applied in this area, further supporting the answer choice.

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  • 16. 

    In storing cement bags in Piles, it should be limited to how many sacks in height

    • 13

    • 12

    • 14

    • 15

    Correct Answer
    A. 12
    Explanation
    The correct answer is 12. When storing cement bags in piles, it is important to limit the height to avoid any potential safety hazards or instability. By limiting the height to 12 sacks, the weight and pressure on the lower sacks can be evenly distributed, reducing the risk of collapse or damage to the bags. This ensures a stable and secure storage arrangement for the cement bags.

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  • 17. 

    Three-dimensional prefabricated polymeric systems ranging from 100mm to200mm high. The geocell systems are collapsed for delivery to the site, spread open andfilled to form a three-dimensional reinforced mattress upon arrival at a site. Originallydeveloped to rapidly stabilize soft subgrades for mobilization of large equipment, they are nowfrequently used for protection and stabilization of steep slope surfaces and protective liningsfor channels.

    • Geocells

    • Geonets

    • Geomembranes

    Correct Answer
    A. Geocells
    Explanation
    Geocells are three-dimensional prefabricated polymeric systems that can range from 100mm to 200mm high. These systems are collapsed for delivery to the site and then spread open and filled to form a three-dimensional reinforced mattress. They were originally developed to quickly stabilize soft subgrades for the mobilization of large equipment. However, they are now commonly used for the protection and stabilization of steep slope surfaces and as protective linings for channels. Therefore, geocells are the correct answer in this context.

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  • 18. 

    _______ are substances added to cements, mortars, concrete for the purpose of improving or imparting particular properties

    • Plasticizer

    • Addmixture

    • Retarder

    Correct Answer
    A. Addmixture
    Explanation
    Addmixture refers to substances that are added to cements, mortars, and concrete to enhance or impart specific properties. These substances are used to improve the workability, durability, strength, or other characteristics of the material. Plasticizer is a type of addmixture that increases the plasticity or flowability of the concrete. Retarder is another type of addmixture that slows down the setting time of the concrete.

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  • 19. 

    Construction materials consisting of synthetic components made for use with or within earth materials generally

    • GEOSYNTHETICS

    • GEOPLASTICIZED

    • GEOMORPHOLOGY

    Correct Answer
    A. GEOSYNTHETICS
    Explanation
    Geosynthetics are construction materials made of synthetic components that are used with or within earth materials. They are designed to enhance the performance and durability of earth structures such as roads, slopes, and retaining walls. Geosynthetics can include materials like geotextiles, geogrids, and geomembranes, which are used to provide reinforcement, filtration, drainage, and erosion control. They are widely used in civil engineering and geotechnical applications to improve the strength and stability of soil and rock masses.

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  • 20. 

    Asphaltic concrete prepared with a relatively light and slow-curing asphalt, placed over a prepared surface withoutheat; hardens to a state that is less firm and durable than hot-mix asphaltic concrete

    • COLD MIX ASPHALT OR ASPHALTIC CONCRETE

    • ASPHALTIC MACADAM

    • HOT MIX ASPHALT or ASPHALTIC CONCRETE

    Correct Answer
    A. COLD MIX ASPHALT OR ASPHALTIC CONCRETE
    Explanation
    Cold mix asphalt or asphaltic concrete is the correct answer because it is prepared with a relatively light and slow-curing asphalt, placed over a prepared surface without heat. It hardens to a state that is less firm and durable than hot-mix asphaltic concrete. This type of asphalt is commonly used for temporary repairs, patching potholes, and low-volume roadways. It does not require heating during the mixing and laying process, making it more convenient and cost-effective for certain applications.

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  • 21. 

    When cement is mixed with water and a fine aggregate or less than 6mm (¼“), it is known as

    • Putik

    • Mortar, stucco or cement plaster

    • Clay

    • Grouts

    Correct Answer
    A. Mortar, stucco or cement plaster
    Explanation
    When cement is mixed with water and a fine aggregate or less than 6mm (¼“), it is known as mortar, stucco or cement plaster. Mortar is a mixture used in construction for binding bricks, stones, or other materials together. Stucco is a plastering material used for coating walls and ceilings. Cement plaster is a type of plaster made from cement, sand, and water, commonly used for finishing interior and exterior walls. All three terms refer to mixtures involving cement, water, and a fine aggregate, making them the correct answer choices.

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  • 22. 

    Is defined as the Liquid Limit minus the Plastic Limit: LL – PL = PI, that is the range of water content over which sediment behaves.

    • Liquid Limit (LL)

    • Plastic Limit (PL)

    • Plasticity Index (PI)

    Correct Answer
    A. Plasticity Index (PI)
    Explanation
    The Plasticity Index (PI) is the correct answer because it is defined as the difference between the Liquid Limit (LL) and the Plastic Limit (PL). The PI represents the range of water content over which sediment behaves. It is an important measure in geotechnical engineering as it indicates the plasticity and compressibility of soil. A higher PI value indicates a higher clay content and greater potential for settlement and deformation. Conversely, a lower PI value indicates a higher sand or silt content and less potential for deformation.

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  • 23. 

    Division 3 of Materials Specification

    • Concrete

    • Masonry

    • General notes

    • Site works

    Correct Answer
    A. Concrete
    Explanation
    The given answer "Concrete" is the correct answer because the question is asking for the division of materials specification, and out of the options provided (Concrete, Masonry, General notes, Site works), "Concrete" is the only option that falls under the category of materials specification. The other options are either specific types of construction materials (Masonry) or general categories that may or may not include materials (General notes, Site works).

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  • 24. 

    (an aggregate larger than ¼” in size”) consists of crushed stones,gravel or other inert materials of similar characteristics.

    • Sands

    • Fine rocks

    • Fine agrtegates

    • Course aggregates

    Correct Answer
    A. Course aggregates
    Explanation
    Course aggregates are larger than ¼" in size and are made up of crushed stones, gravel, or other inert materials with similar characteristics. This means that they are used for applications that require a stronger and more durable material, such as in the construction of roads, highways, and concrete structures. They provide stability and strength to the overall structure and are not easily affected by weathering or erosion. Therefore, course aggregates are the correct answer in this context.

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  • 25. 

    In arbitrary proportion, the proportion of concrete For slabs, beams, columns, arches, stairs, walls of 100mm (4”) thickness

    • Class “AA” 1 : 1.5 : 3

    • Class “A” 1 : 2 : 4

    • Class “B” 1 : 2.5 : 5

    • Class “C” 1 : 3 : 6

    Correct Answer
    A. Class “A” 1 : 2 : 4
    Explanation
    The given answer of Class "A" 1 : 2 : 4 suggests that for slabs, beams, columns, arches, stairs, and walls of 100mm (4") thickness, the proportion of concrete should be 1 part cement, 2 parts sand, and 4 parts aggregate. This means that for every unit of cement, there should be 2 units of sand and 4 units of aggregate in the concrete mixture. This proportion is suitable for achieving the desired strength and durability of the concrete structure.

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  • 26. 

    Are manufactured from such ingredients as rosin, beef tallow,stereates, foaming agents (soap). They introduce minute air bubbles throughout theconcrete which greatly increases the resistance of concrete to freezing and thawing,increases plasticity and reduces bleeding. Addition of air-entraining admixtures is usuallyin the protection of 3 to 6% of the volume of concrete. These require careful control andmore frequent slump tests. They may also cause some loss of strength.

    • Retarders,

    • Colored pigments

    • Accelerators

    • Air-entraining agents

    Correct Answer
    A. Air-entraining agents
    Explanation
    Air-entraining agents are added to concrete to introduce minute air bubbles throughout the mixture. This helps to increase the resistance of the concrete to freezing and thawing, improve plasticity, and reduce bleeding. The addition of these agents is typically done in a proportion of 3 to 6% of the volume of concrete. However, their use requires careful control and more frequent slump tests. It is important to note that while air-entraining agents offer these benefits, they may also cause some loss of strength in the concrete.

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  • 27. 

    Involves drilling through the slab floor and injecting termiticides into the soil atregular intervals.

    • Slab treatment

    • Basements and Crawl Spaces

    • Vertical barriers

    Correct Answer
    A. Slab treatment
    Explanation
    Slab treatment involves drilling through the slab floor and injecting termiticides into the soil at regular intervals. This method is commonly used in basements and crawl spaces to create vertical barriers against termites. By injecting termiticides into the soil, the treatment effectively creates a barrier that prevents termites from entering the structure through the slab. This method is considered effective in preventing termite infestations and protecting the structure from potential damage caused by termites.

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  • 28. 

    In materials specification, what is devision 2

    • Site works

    • General notes

    • Masonry

    • Concrete

    Correct Answer
    A. Site works
    Explanation
    Division 2 in materials specification refers to Site works. This division includes all the activities and materials required for the preparation and development of the construction site. It involves tasks such as site clearing, excavation, grading, drainage, and landscaping. This division ensures that the site is properly prepared and ready for the construction process to begin.

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  • 29. 

    Utilizes bauxite, the ore from which aluminum is made, as the major raw material. It is called aquick-setting cement and its advantage is that after setting for 24 hours, alumina cementattains a compressive strength equal to the strength developed in ordinary cement only at anage of 28 days. The quick hardening produces considerable heat advantageous in coldweather construction.

    • Masonry cements

    • Alumina cement

    • Natural cements

    • Pozzolanic cement

    Correct Answer
    A. Alumina cement
    Explanation
    Alumina cement is the correct answer because the passage states that it utilizes bauxite, the ore from which aluminum is made, as the major raw material. Additionally, it is referred to as a quick-setting cement and has the advantage of attaining a compressive strength equal to ordinary cement after only 24 hours, compared to the 28 days needed for ordinary cement. The quick hardening of alumina cement also produces heat, which is beneficial for construction in cold weather.

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  • 30. 

    In reinforced-concrete work or in structures exposed to the elements, ______ cement is invariably employed because of its uniform quality and the high strength which it rapidly acquires.

    • Portland

    • Slag

    • Pozzolanic

    • Alumina

    Correct Answer
    A. Portland
    Explanation
    In reinforced-concrete work or in structures exposed to the elements, Portland cement is invariably employed because of its uniform quality and the high strength which it rapidly acquires. Portland cement is a type of hydraulic cement that is widely used in construction due to its ability to harden under water and form a strong bond with other materials. It is known for its consistent quality and quick setting time, making it suitable for various applications where durability and strength are required.

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  • 31. 

    EApplying one gallon of termiticide per 10 square feet, usually by coarse spray at lowpressure. All termite treatments to slab construction should include horizontal barriers,which are relatively easy to apply.

    • Pre-construction chemical barriers

    • Vertical barriers

    • Horizontal barriers

    Correct Answer
    A. Horizontal barriers
    Explanation
    Horizontal barriers are recommended for termite treatments in slab construction because they are relatively easy to apply. These barriers involve applying one gallon of termiticide per 10 square feet, usually by coarse spray at low pressure. By creating a barrier at ground level, horizontal barriers help prevent termites from entering the structure through the slab. This method is effective in deterring termites and can be easily implemented during the construction process.

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  • 32. 

    Which of the following is a addmixture that will impart water-repellant or water-proofing qualities

    • Calcium chloride

    • Kaoline

    • Metali chrome

    Correct Answer
    A. Kaoline
    Explanation
    Kaoline is a type of clay that is often used as an additive in various industries, including construction. It has water-repellent properties, which means it can help to make materials or surfaces more resistant to water penetration. This makes it a suitable choice for imparting water-repellent or waterproofing qualities to products such as paints, coatings, and sealants. Calcium chloride and Metali chrome, on the other hand, do not possess these water-repellent properties, making them incorrect choices for this question.

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  • 33. 

    Conncrete without reinforcement is called 

    • Reinforced

    • Light weight

    • Mass concrete

    • Aerated

    Correct Answer
    A. Mass concrete
    Explanation
    Mass concrete refers to concrete that is used in large structural elements where the heat generated during curing can cause thermal cracking. It is typically used in dams, bridges, and other massive structures. Unlike reinforced concrete, which contains steel reinforcement to provide tensile strength, mass concrete relies solely on its own compressive strength to withstand loads. Therefore, the correct answer is mass concrete.

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  • 34. 

    Used for measuring the consistency of a concrete mix, defined as the “state offluidity of the mix”, and it includes the entire range of fluidity from the wettest to the dries possible mixtures.

    • Tension test

    • Compression test

    • Slump test

    • Water cement ratio test

    Correct Answer
    A. Slump test
    Explanation
    The correct answer is "slump test". The slump test is used to measure the consistency of a concrete mix by determining its fluidity. It assesses the "state of fluidity" of the mixture, ranging from the wettest to the driest possible mixtures. The slump test involves filling a slump cone with the concrete mix, compacting it, and then removing the cone to observe the slump or settlement of the concrete. This test helps ensure that the concrete mix has the desired workability and can be properly placed and compacted.

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  • 35. 

    A layer of sand with uniform sizeparticles, area must be large enough toprevent the termite from moving throughit or prevents its use in "tunnel" construction.

    • Termite Resistant Sand

    • Termite Mesh

    • Vertical barriers

    Correct Answer
    A. Termite Resistant Sand
    Explanation
    Termite Resistant Sand is the correct answer because it forms a layer of sand with uniform-sized particles that acts as a barrier against termites. The sand particles are large enough to prevent termites from moving through it or using it for tunnel construction. This sand acts as a deterrent and helps protect against termite infestation.

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  • 36. 

    The delivery from the mixer to the forms should be fairly continuous and uninterrupted,not exceeding_____ minutes.

    • 15

    • 30

    • 20

    • 10

    Correct Answer
    A. 30
    Explanation
    The delivery from the mixer to the forms should be fairly continuous and uninterrupted. This means that there should not be any significant breaks or pauses in the delivery process. The maximum time allowed for the delivery should not exceed 30 minutes. This ensures that the concrete remains in a workable state and does not start to set before it is poured into the forms. Any delays beyond this time limit may result in poor quality concrete and compromised structural integrity.

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  • 37. 

    The most common geosynthetics, consist of woven or nonwoven fabric made from polymeric materials such as polyester or polypropylene

    • Geocomposites

    • Geomembranes

    • Geotextiles

    Correct Answer
    A. Geotextiles
    Explanation
    Geotextiles are the most common type of geosynthetics, which are materials used in civil engineering projects to improve soil stability and prevent erosion. Geotextiles are typically made from polyester or polypropylene and can be either woven or nonwoven fabric. They are used for various applications such as filtration, drainage, separation, and reinforcement. Geocomposites and geomembranes are also types of geosynthetics, but they are not as commonly used as geotextiles.

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  • 38. 

    The moisture content at which a soil changes from the liquid state to theplastic state, measured when soil in a shallow dish flows to close a 12.5 mm groove after25 drops from 1 cm.

    • Liquid Limit (LL)

    • Plastic Limit (PL)

    • Plasticity Index (PI)

    Correct Answer
    A. Liquid Limit (LL)
    Explanation
    The liquid limit (LL) is the moisture content at which a soil transitions from a liquid state to a plastic state. This transition is measured by determining the point at which soil in a shallow dish flows to close a 12.5 mm groove after 25 drops from 1 cm. The liquid limit is an important property of soil that helps determine its behavior and engineering characteristics.

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  • 39. 

    Are tests performed on soils passing the No.40 sieve

    • Plasticity Index (PI)

    • ATTERBERG LIMITS

    • Plastic Limit (PL)

    • Liquid Limit (LL)

    Correct Answer
    A. ATTERBERG LIMITS
    Explanation
    The Atterberg limits are a set of tests used to determine the consistency and plasticity of soils. These tests include the Plastic Limit (PL) and Liquid Limit (LL), which are used to calculate the Plasticity Index (PI). The Plastic Limit (PL) is the moisture content at which a soil transitions from a plastic to a semi-solid state, while the Liquid Limit (LL) is the moisture content at which a soil transitions from a liquid to a plastic state. These tests are important in assessing the behavior and suitability of soils for various engineering applications.

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  • 40. 

    A dark brown to black cementitious material, solid or semisolid,composed of bitumens which occur in nature but are obtainedartificially in refining petroleum, and which when mixed with graded aggregates is used as paving material by placing, shaping, and compactingwhile hot over a prepared base.

    • COLD MIX ASPHALT OR ASPHALTIC CONCRETE

    • ASPHALTIC MACADAM

    • HOT MIX ASPHALT or ASPHALTIC CONCRETE

    Correct Answer
    A. HOT MIX ASPHALT or ASPHALTIC CONCRETE
    Explanation
    The correct answer is "HOT MIX ASPHALT or ASPHALTIC CONCRETE" because it accurately describes the dark brown to black cementitious material made from bitumens obtained in petroleum refining. This material is mixed with graded aggregates and used for paving by placing, shaping, and compacting while hot over a prepared base.

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  • 41. 

    The proportioned mixture of cement, aggregate and water, which when properly proportioned, is at first a plastic mass which can be cast or molded into predetermined size or shape

    • Cement

    • Aggregates

    • Concrete

    • Water

    Correct Answer
    A. Concrete
    Explanation
    Concrete is a mixture of cement, aggregates, and water that, when properly proportioned, forms a plastic mass. This plastic mass can be cast or molded into a predetermined size or shape. Cement is the binding agent that holds the mixture together, while aggregates provide strength and stability. Water is added to the mixture to initiate the chemical reaction that causes the cement to harden and form a solid structure. Therefore, the correct answer is concrete.

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  • 42. 

    When a large aggregate of more than 6mm (¼”) in size is added to cement,water and fine aggregate, the product is 

    • Concrete

    • Mortar, stucco or cement plaster

    • Clay

    • Grouts

    Correct Answer
    A. Concrete
    Explanation
    When a large aggregate of more than 6mm (¼”) in size is added to cement, water, and fine aggregate, the resulting product is concrete. Concrete is a composite material made up of cement, water, and aggregates such as sand, gravel, or crushed stone. The addition of large aggregates gives concrete its strength and durability, making it suitable for various construction applications. Mortar, stucco, and cement plaster are also made with cement and water but do not contain large aggregates like concrete. Clay and grouts are different materials altogether and do not fit the given description.

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  • 43. 

    Tcontinuous polymeric sheets that are impermeable; the most frequently used for ground applications and pond lining are thermoplastic products manufactured from high-density polyethylene (HDPE) and polyvinyl chloride (PVC)

    • Geomembranes

    • Geotextiles

    • Geocomposites

    Correct Answer
    A. Geomembranes
    Explanation
    Geomembranes are continuous polymeric sheets that are impermeable, making them suitable for applications such as ground lining and pond lining. They are commonly made from thermoplastic materials like HDPE and PVC. Geomembranes are different from geotextiles and geocomposites, which serve different purposes in geotechnical engineering.

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  • 44. 

    Inert mineral fillers used with cement water in making concrete, should be particles that aredurable strong, clean, hard and uncoated, and which are free from injurious amount of dusts,lumps, soft and flaky particles, shale, alkali, organic matter loam or other deleterioussubstances

    • Minerals

    • Aggregates

    • Clays

    • Sands

    Correct Answer
    A. Aggregates
    Explanation
    Aggregates are the correct answer because they fulfill all the requirements mentioned in the question. They are durable, strong, clean, hard, and uncoated. They are also free from dust, lumps, soft and flaky particles, shale, alkali, organic matter, loam, or any other harmful substances. Aggregates are commonly used in concrete to provide strength and stability to the mixture.

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  • 45. 

    The use of beach sand or lahar shall be _______ in making concrete

    • Productively used

    • Can be used

    • Prohibited

    Correct Answer
    A. Prohibited
    Explanation
    Beach sand or lahar should be prohibited from being used in making concrete. This is likely because beach sand may contain salt, which can cause corrosion and weaken the concrete structure over time. Similarly, lahar, which is volcanic mudflow, may contain excessive amounts of silt and clay particles, affecting the strength and durability of the concrete. Therefore, it is recommended to avoid using these materials in concrete production to ensure the quality and longevity of the concrete.

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  • 46. 

    Consist of a continuous extrusion of polymeric ribs, forming void space throughwhich provide in-plane flow capacity; available with or without bonded geotextile filters.Geonets with bonded geotextile filters are sometimes called composite drainage nets (CDNs).

    • Geotextiles

    • Geonets

    • Geomembranes

    Correct Answer
    A. Geonets
    Explanation
    Geonets are a type of drainage material that consist of a continuous extrusion of polymeric ribs. These ribs create void spaces that allow for in-plane flow capacity. Geonets can be used with or without bonded geotextile filters. When geonets are combined with geotextile filters, they are referred to as composite drainage nets (CDNs). Geonets are commonly used in various applications such as drainage systems, landfill liners, and erosion control.

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  • 47. 

    Type of cement made of lime mortar and pozzolanic material. Various natural materialscontain active silica, among them pozzolan (volcanic ash), granulated slag and pumice. Slagcement is a ___________ cement.

    • Masonry cements

    • Alumina cements

    • Natural cements

    • Pozzolanic cement

    Correct Answer
    A. Pozzolanic cement
    Explanation
    Pozzolanic cement is a type of cement that is made by combining lime mortar with a pozzolanic material, such as volcanic ash, granulated slag, or pumice. These materials contain active silica, which reacts with lime to form cementitious compounds. Pozzolanic cement is commonly used in masonry applications due to its ability to improve workability and durability of mortar. It is different from other types of cement like masonry cements, alumina cements, and natural cements, which have different compositions and properties.

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  • 48. 

    A combination of geosynthetic components, usually sheet or edge drainsconsisting of a prefabricated core to which a geotextile filter is bonded. The core provides void space to which water can flow in-plane while the geotextile filter keeps soil from filling the voids created by the core.

    • Geomembranes

    • Geocomposites

    • Geotextiles

    Correct Answer
    A. Geocomposites
    Explanation
    Geocomposites are a combination of geosynthetic components that consist of a prefabricated core bonded with a geotextile filter. The core allows water to flow through it, while the geotextile filter prevents soil from filling the voids created by the core. This combination of components makes geocomposites effective in drainage applications, as they allow water to pass through while keeping the soil in place. Geomembranes and geotextiles, on the other hand, do not have the same combination of components and characteristics as geocomposites.

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  • 49. 

     (also called stainless cement because it is free of iron impurities which stain porous marbles, some granites and limestone and other light-colored stones)

    • Brown cement

    • White cement

    • Grey cement

    • Aluminum cement

    Correct Answer
    A. White cement
    Explanation
    White cement is the correct answer because it is free of iron impurities that can stain porous marbles, granites, limestone, and other light-colored stones. This type of cement is commonly used in applications where aesthetics and color consistency are important, such as in architectural designs or decorative elements. Unlike brown, grey, or aluminum cement, white cement provides a clean and uniform appearance, making it suitable for projects that require a lighter color palette.

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