Answer. It increases the maximum compacted unit weight of the soil. Study of chemical properties of drugs like hydrolysis, oxidation, reduction, racemization, polymerization etc., and their influence on formulation and stability of products. MCQ Questions for Class 7 Science with Answers were prepared based on the latest exam pattern. Study of pro-drugs in solving problems related to stability, bioavailability and elegancy of formulations. The water content of soil is defined as the ratio of. Answer: Option D. 3. 32) If the unit weight of soil is 20 kn/m3 cohesion is 15 kn/m2, factor of safety is 1.5 and the stability number is 0.05, the safe maximum height of the slope is. It is useful for stabilization of … Soil Stabilization - MCQ 1. Chemical stabilization includes the use of chemicals and emulsions as compaction aids to soils, as binders and water repellents, and as a means of modifying the behavior of clay. It also makes it easier to compact the soil because the particles have been crushed into smaller size. Stabilisation of soils are most commonly used in _____ engineering works. It also includes deep mixing and grouting. ⇰ Soil-lime is widely used either as a modifier for clayey soil or as a binder. a) Fellenius method b) Swedish slip circle method c) Bishop’s simplified method d) Spencer’s method Answer: b Q.9> Process of chemical weathering is represented by-[CDS 1991] A: expansion and contraction due to heat. The aim of soil stabilization is to increase the a) Seepage.b) Bearing capacity.c) Shear strength.d) Both (b) and (c). Q2. Choose the correct answer: Question 1. rocks—must be stabilized through chemical and mechanical processes. Chemical Stabilization of Soil: Calcium chloride being hygroscopic and deliquescent is used as a water retentive additive in mechanically stabilized soil bases and surfacing. Stabilization deals with physical, physico-chemical and chemical methods to make the stabilized soil serve its purpose as engineering material. We have Provided Physical and Chemical Changes Class 7 Science MCQs Questions with Answers to help students understand the concept very well. In essence, chemical stabilization is performed to favourably change the soil-water interactions. … When the chemical stabilization or modification of subgrade soils is considered as the most economical or feasible alternate, the following criteria should be considered for chemical selection based on index properties of the soils. Check the below NCERT MCQ Questions for Class 7 Science Chapter 6 Physical and Chemical Changes with Answers Pdf free download. 6. The angle of internal friction is maximum for. Lime and Fly ash in combination can often be used successfully in stabilizing granular materials. We have Provided Soil Class 7 Science MCQs Questions with Answers to help students understand the concept very well. Acidification of soil by acid rain. Grouting method is one of the soil improvement methods that uses to increase strength and reduces the liquefaction potential of soil. The cementing action is believed to be the result of chemical reactions of cement with siliceous soil during hydration reaction. (A) Face to face or parallel orientation. Stabilization of low quality aggregate or soil can be done by mechanical, chemical, electrical or thermal means. Permeation grouting or chemical grouting, as it is more commonly referred to, is the injection of low viscosity solution or fluid grouts to permeate the pore spaces in granular soils. Q3. With a very few exceptions, however, the chemical soil stabilization methods still cannot be fully evaluated from the aspects of soil physics, technology, and economic efficiency, and there are only a few such methods that have been generally accepted. Chemical Stabilization Cont. Hydration and Hydrolysis. Acts as a dispersing agent. A chemical stabilization method is the fundamental of this review and, therefore, throughout the rest of this report, the term soil stabilization will mean which … The first is to evaluate the properties of soil and understand what is needed, then deciding method to carry out stabilization, design the mix and consider compaction method. Chemical soil stabilization is intended to modify the interactions between water and soil by surface reactions in such a manner as to make the behaviour of the soil with respect to water effects most favourable for the given purpose. (A) Dominant spectrum. View The most common chemical grout material is sodium silicate based solution which typically use an organic reactant to attain predictable gel times. The water content of the The vapour pressure gets lowered, surface tension increases and rate of evaporation decreases. _________ are soils in which more than half of the parent mineral matter is volcanic ash and appear very dark in colour. Soil Class 7 MCQs Questions with Answers. Stabilization therefore helps in boosting the strength of the soil. This method of soil stabilization methods includes compaction and densification of soil matter by application of mechanical energy using various sorts of rollers, rammers, vibration techniques, and sometimes blasting. To prepare a) a true solution of common salt, sugar and alum b) a suspension of soil, chalk powder and fine sand in water c) a colloidal of starch in water and egg albumin in water and distinguish between these on Dispersed type of soil structure is an arrangement comprising particles having. Read: Geography MCQ Set] Solar System – Objective GK Questions. QUESTION: 5. technique. (B) Lightness or brightness. Lime Stabilization. Hue denotes. (a) Earthquakes or volcanic eruptions (b) Weathering of rocks (c) Addition of humus (d) All are involved in the formation of soil The contamination or degradation of soil due to the presence of impurities like chemicals, xenobiotics, toxic wastes, plastic, etc that alters the natural composition of the soil is termed as soil pollution. The method is relatively inexpensive but long-term stability is doubtful. Soil-lime Stabilization. We are fully insured and licensed to ensure customer satisfaction in completing the job. 28. LF stabilization is often appropriate for base and sub-base course materials. The specific yield of soil depends upon. There are two principal ways to apply the ion exchange solution. (A) The object of classifying soils is to arrange them into groups according to their properties and behaviour (B) A soil classification system is meant to provide an accepted and systematic method of describing the various types of soils eliminating personal factors (C) The first category of soil classification is based on grain size of the soil C: growth of crystal and frost action. 1. This set of Geotechnical Engineering Multiple Choice Questions & Answers (MCQs) focuses on “Mechanical Stabilisation”. It can either be: Which of the following method is also called as the Slices method? B: Mass exfoliation. Advantages of Chemical Stabilization 1) In this stabilization method, setting time and curing time can be controlled. The limitations of chemical soil stabilization include disparity between simulated laboratory and field conditions could render insitu application impossible, the risk of groundwater contamination is very high as a result of release of toxic compounds from some of the traditional agents as the leachate of toxic chemicals can affect the environment and human life in general, the balance … Soil Mechanics And Foundation MCQ question is the important chapter for a Civil Engineering and GATE students. ultimate bearing capacity. (C) Purity. Correct Answer. The maximum pressure which a soil can carry without shear failure, is called. There are various methods for stabilizing soils with liquefaction. a) 5.0 m. b) 8.0 m. c) 10.0 m. d) 12.0 m. View Answer. Lime: If PI > … In this page you can learn various important soil mechanics multiple choice questions and answers, sloved soil mechanics lab viva questions with answers, important soil mechanics interview question papers,foundation engineering questions and answers etc. (B) Edge to edge orientation. Our applicator process is used to stabilize the soil pre-construction at a maximum depth of 15' on projects such as: - chemical stabilization Under this category, soil stabilization depends mainly on chemical reactions between stabilizer (cementitious material) and soilminerals (pozzolanic materials) to achieve the desired effect. In the chemical soil stabilization process, an ion exchange solution is applied to the soil to reduce the negative charge of clay particles. 1. The improvement may be accomplished by drainage, compaction, preloading, reinforcement, and grouting, electrical, chemical or thermal methods. A. Solution: Taylor’s stability No. Stabilization of course-grained soils having little or no fines can often be accomplished by the use of LF combination. Lime stabilization is do by adding lime to a soil. ∴. The mechanical Soil Stabilization Method is the method of improving soil properties by changing its gradation. Jun 07,2021 - Test: Soil Exploration | 10 Questions MCQ Test has questions of Civil Engineering (CE) preparation. ∴. The method of stabilizing soils is a commonly undertaken procedure in the construction of airfields, parking lots, landfills, embankments, roads and foundations, waterway management, agriculture and mining sites.
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