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1, , 1.2, , 1.3, , 1.4, , Match List-! with List-I] and select the correct, answer using the codes given below the lists, List-I, , Fineness of cement, , Setting time, , Soundness, , Workability, , List-II, , Le-Chatelier apparatus, , Vicat's needle, , Air permeability apparatus, , . Slump cone, , Codes:, , GOm>, , ona, , (a), (b), (c), (d), , abi OF a Sp., BN +N OD, , Cc, 3, 4, 1, , 3, , VAN AT, , [ESE : 1995], , If ‘p' is the standard consistency of cement, the, amount of water used in conducting the initial, setting time test on cement is, (a) 0.65p (b) 0.85p, (c) 0.6p (d) 0.8p, , [ESE : 1995], , Assertion (A): Pozzolana is added to cement to, increase early strength, Reason (R): It offers greater resistance to the, attack of aggressive waters, (a) both A and R are true and R is the correct, explanation of A, (b) both A and R are true but R is not a correct, explanation of A, (c) Ais true but R is false, (d) Ais false but R is true, [ESE : 1995], , For complete hydration of cement the watercement ratio needed is, , 1.5, , 1.6, , 1.7, , , , (a) less than 0.25, , (b) more than 0.25 but less than 0.35, (c) more than 0.35 but less than 0.45, (d) more than 0.45 but less than 0.60, , [ESE : 1996], , Match List-I (Type of cement) with List-1|, , (Characteristics) and select the correct answer, , using the codes given below the lists, , List-|, , Air entraining portland cement, , Low-heat portland cement, , Hydrophobic portland cement, , Rapid hardening portland cement, , List-ll, , Suitable for very large structures, , Unsuitable for very large masses of concrete, , Greater resistance to frost attack, , Safe storage under unfavourable conditions, , of humidity, , Codes:, A, , gom>, , fo Nis, , (a), (b), (c), (d), , hows, -=-.00, ya-=-0, oOnnog, , (ESE : 1996], , While concreting in cold weather where frosting, , is also likely, one uses., , (a) high quality portland cement with minimum, additives, , (b) high alumina cement with calcium chloride, additives, , (c) portland cement together with calcium, chloride additives, , (d) a mixture of high alumina cement and, portiand cement, , [ESE : 1996], , Gypsum is used as an admixture in cem ent grouts, ‘, ‘or

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1.8, , 1.9, , (a) accelerating the setting time, (b) retarding the setting time, (c) increasing the plasticity, (d) reducing the grout shrinkage, [ESE : 1996], , Which of the following pairs in respect of Ordinary, Portland Cement (OPC) are correctly matched?, 1. Initial setting time 30 minutes, , 2. Final setting time 10 hours, , 3. Normal consistency 10%, , Select the correct answer using the codes given, below, , (a) 1,2and3, (c) 1and2, , (b) 2and3, (d) 1and3, [ESE : 1997], , High alumina cement is produced by fusing, , together a mixture of, , (a) limestone and bauxite, , (b) limestone, bauxite and gypsum, , (c) limestone, gypsum and clay, , (d) limestone, gypsum, bauxite, clay and chalk, [ESE : 1997], , 1.10 Consider the following statements:, , High early strength of cement is obtained as a, result of, , 1. fine grinding, , 2. decreasing the lime content, , 3. burning at higher temperatures, , 4. increasing the quantity of gypsum, , Which of these statements are correct?, , (a) 1and2 (b) 1and3, (c) 2,3 and4 (d) 1,3and4, [ESE : 1997], 1.11 Before testing setting time of cement one should, test for, (a) soundness (b) strength, (c) fineness (d) consistency, [ESE : 1998], , 1.12 Consider the following statements:, , 1. Tests on cement paste to determine initial and, final setting times are done at normal, consistency condition., , 2. Low heat cement has a high percentage of, tricalcium aluminate., , 3. High early strength portland cement contains, a larger percentage of tricalcium silicate and a, lower percentage of dicalcium silicate., , Building Materials, , Which of these statements are correct?, (a) 1and2 (b) 1 and3, (c) 2and3 (d) 1,2and3, [ESE : 1999], , 1.13 Match List-I (Property of cement) with List-Il, , (Testing apparatus) and select the correct answer, using the codes given below the lists, List-I, , A. Specific gravity, B. Setting time, C. Soundness, D. Fineness, , List-Il, 1. Blain's apparatus, 2. Le Chatelier's flask, “3. Compressometer, 4, Autoclave, 5. Vicat's apparatus, Codes:, , A B Cc OD, (@@ 3 5 1 2, (b) 2 5 1 4, (c) 2 5 4 1, (d) 5 3 4 1, , [ESE : 1999], , 1.14 The role of superplasticizer in a cement paste is, , to, , (a) disperse the particles, , (b) disperse the particles and to remove air, bubbles, , (c) disperse the particles, remove air bubbles and, to retard setting, , (d) retard setting, , [ESE : 1999], , 1.15 Consider the following oxides:, , 1.0, 2.CaO 3. SiO,, The correct sequence in increasing order of their, percentage in an ordinary portland cement is, (a) 2,1,3 (b) 1,3, 2, (c) 3,1,2 (d) 1,2,3, [ESE : 1999], , 1.16 Increase in fineness of cement, , (a) reduces the rate of strength development and, leads to higher shrinkage, , (b) increases the rate of strength development, and reduces the rate of deterioration

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4 GIA Civil Engineering » Volume!, , (c) decreases the rate of strength development, and inereases the bleeding of cement, , (da) increases the rate of strength development, and leads to higher shrinkage, , (ESE : 1999], , 1.17 Match List-I (Cement) with List-Il (Characteristic), and select the correct answer using the codes, given below the lists, , List-I, , High alumina cement, , Blast turnace cement, , Quick setting cement, , Rapid hardening cement, , List-Il, , High early strength, , Gypsum free cement, , Selenetic cement, , Used in mass concrete work, , . Used in chemical factories and mines, , Codes:, , A, , com>,, , rons, , (a), (b), (c), (d), , bok o, opr woh w, =o nNno, Nn +0O0, , [ESE : 2000], , 1.18 The fineness of cement is tested by, (a) air-content method, (b) air-permeability method, (c) Le-Chatelier apparatus, (d) Vicat's apparatus, [ESE : 2000], , 1.19 The test on cement designed to accelerate the, slaking process of the ingredient of cement and, to determine the resulting expansion in a short, time is, (a) setting time test, (b) soundness test, (c) normal consistency test, (d) accelerated test, , [ESE : 2000], , 1.20 Consider the following statements:, 1. Addition of a small quantity of slaked lime to, Portland cement in cement mortar increases, the plasticity of the mortar., , Objective, , Solved Paper,, , ?. Light weight mortar is prepared by mixing, cement and finely crushed fire bricks witr, waler, , 3. Fire resistant mortar is prepared by mixing, aluminous cement and finely ground china Clay, wares with water., , Which of these statements are correct?, , (a) 1and2 (b) 1and3, , (c) 2and3 (d) 1,2 and3, , [ESE : 2000], , 4.21 Consider the following statements, High Alumina Cement (HAC), 1. has high early compressive strength and high, heat of hydration than OPC-43 grade, 2. is not suitable to be used in cold regions, Which of these statements is/are correct?, (a) 1 alone (b) 2 alone, (c) Both 1 and 2 (d) Neither 1 nor 2, [ESE : 2001], , 1.22 Consider the following statements:, When cement is tested for setting time; on, gauging it shows quick setting. This phenomenon, known as “Flash set” of cement is due to the, presence of high, 1. tricalcium aluminate (C,A) in cement, 2. alkalies in cement, 3. tricalcium silicate (CS) in cement, Which of these statements are correct?, (a) 1,2and3 (b) 2and3, (c) 1and2 (d) 1and3, [ESE : 2001], , 1.23 Which one of the following statements regarding, the cement fineness is NOT correct?, , (a) Fine cement is more liable to suffer from, shrinkage cracking than a coarse cement., , (b) Fine cement will show faster rate of hardening, than coarse cement., , (c) Fine cement shows faster rate of heat, evolution and total quantity of heat evolved, is much large than coarse cement, , (d) Fine cement shows the same setting time as, coarse cement., , [ESE : 2001], , 1.24 For marine works, the best suited cement is, (a) low heat portland cement, (b) rapid hardening cement

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made ERSY i Building Materials, , , , (c)_ ordinary portland cement 1,29 Match List-1 (lype of cement) with List-Hl, , (d) blast furnace slag cement (Characteristics) and select the correct answer, [ESE : 2001] using the codes given below the lists, List-I, , Ordinary portland cement, , Rapid hardening cement, , Low heat cement, , Sulphate resistant cement, , Directions: The following items consists of two, statements, one labelled as ‘Statement (1)' and the, other as ‘Statement (II)’. You are to examine these two, statements carefully and select the answers to these, items using the codes given below:, , Codes: List-Il, , (a) both A and R are true and R is the correct The percentage of C,S is maximum and is of, , goOm>, , explanation of A, , (b) both A and R are true but R is not a correct, explanation of A, , (c) Ais true but R is false, , (d) Ais false but R is true, , 4.25 Assertion (A): Flash set is the stiffening of the, , cement paste within a few minutes after mixing., Reason (R): Flash set occurs due to insufficient, gypsum to control the rapid reaction of CA with, , water., [ESE : 2002], , 4.26 Assertion (A): The amount of cement paste should, , be sufficient to cover the surface of all particles, for proper workability and bond, Reason (R): The water-cement ratio is fixed, , accordingly., [ESE : 2002], , 1.27 Assertion (A): The higher percentage of tricalcium, , silicate in cement results in rapid hardening with, an early gain in strength at a higher heat of, hydration., , Reason (R): A higher percentage of dicalcium, silicate in cement results in slow hardening and, less heat of hydration and greater resistance to, , chemical attack., [ESE : 2002], , 1.28 Assertion (A): For a given composition, a finer, , cement will develop strength and generate heat, more quickly than a coarse cement., Reason (R): The reaction between water and, cement starts on the surface of the cement, particles and in consequence the greater the, surface area of a given volume of cement, the, greater the hydration, , (ESE : 2002], , the order of 50%, , 2. The percentages of C,S and C,S are the same, and of the order of 40%, , 3. Reacts with silica during burning and causes, particles to unite together and development, of strength, , 4, Preserves the form of brick at high, temperature and prevents shrinkage, , Codes:, , A B Cc OD, @ 2 4 1 3, () 3 1 4 2, (« 2 1 4 3, @ 3 4 #1 2, , [ESE : 2002], , 1.30 Match List-! (Type of cement) with List-II, , (Property/Characteristic) and select the correct, answer using the codes given below the lists:, List-I, , High strength portland cement, , Super sulphated cement, , High alumina cement, , Rapid hardening portland cement, , List-Il, , Should not be used with any admixture, , ls extremely resistant to chemical attack, Gives a higher rate of heat development, during hydration of cement, , 4. Has ahigher content of tricalcium silicate, Codes:, , gom>, , ens, , A B Cc D, (a) 3 2 1 4, (bt) 4 1 2 3, (ce) 3 1 2 4, (d) 4 2 1 3, , [ESE : 2002]

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6 Gana Civil Engineering + Volume, , 4.31 Four main oxides present in ordinary portland, cement are CaO, Al,O,, SIO, and Fe,O,, Identify, the correct ascending order of their proportions, ina typical composition of OPC, (a) Al,O,, Fe,0,, CaO, SiO,, , (b) Al,O,, CaO, Fe,0,, SIO,, (c) Fe,O,,. Al,O,, SiO,,Cao, (a) Fe,O,, SiO,, Al;0,, Cad, [ESE : 2002], , Directions: The following items consists of two, statements: one labelled as ‘Assertion (A)’ and the, other as ‘Reason (R)'. You are to examine these two, statements carefully and select the answers to these, items using the codes given below:, Codes:, (a) both A and R are true and R is the correct, explanation of A, (6) both A and R are true but R is not a correct, explanation of A, (c) Ais true but R is false, (d) Ais false but R is true, , 1.32 Assertion (A): The greater the surface area of a, given volume of cement the greater the hydration., Reason (R): The reaction between the water and, cement starts from the surface of the cement, Particles., , [ESE : 2003], , 1.33 Assertion (A): Alow C,A cement generates less, heat and develops higher ultimate strength, Reason (R): During setting and hardening, the, amount of lime liberated appears to be about 15, to 20 per cent by weight of cement., [ESE : 2003], , 1.34 The proper size of mould for testing compressive, strength of cement is, (a) 7.05 cmcube, (c) 15cmcube, , (b) 10.05 cm cube, (d) 12.05 cm cube, [ESE : 2003], , 1.35 The specific gravity of commonly available, ordinary portland cement is, (a) 4.92 (b) 3.15, (c) 2.05 (d) 1.83, [ESE : 2003], , 1.36 A quick-setting cement has an initial setting time, of about, , C Ubjoctive, , Solved Papers, , (b) 40 minutes, (d) 5 minutes, , [ESE : 2003], , (a) 50 minutes, (c) 15 minutes., , 1.37 Consider the following statements, Low percentage of C.,S and high percentage of, C,S in cement will result in, 1. higher ultimate strength with less heat, generation, 2. rapid-hardening, 3. better resistance to chemical attack, Which of these statements are correct?, (a) 1and2 (b) 2and3, (c) 1and3 (d) 1,2and3, [ESE : 2004], , 1.38 Match List-I (Type of cement) with List-1|, (Property) and select the correct answer using the, codes given below the lists:, , List-|, , Blast furnace slag cement, , High alumina cement, , Low heat cement, , White cement, , List-II, , High percentage of tricalcium silicate, , Initial setting time is approximately three and, , a half hours, , 3. Low percentage of iron oxide, , 4. Rate of hardening is low, , Codes:, , gOm>, , ya, , A B C OD, (@) 4 3 1 2, (b) 1 3 4 2, () 1 2 4 3, qd) 4 2 «1 3, , [ESE : 2004], , 1.39 Match List-I (Type of cement) with List-ll, (Characteristics) and select the correct answer, using the codes given below the lists:, , List-l, , Rapidly hardening cement, , Low heat portland cement, , Portland pozzolana cement, , Sulphate resisting cement, , List-Il, , Lower CA content than that in OPC, , Contains pulverised fly ash, , VORS, , aes