Description : Minimum number of 50 kg cement bags per cubic metre of concrete for a mix corresponding to crushing strength 280 kg/cm2 at 28 days, are (A) 5.0 (B) 6.5 (C) 7.0 (D) 7.5
Last Answer : Answer: Option B
Description : Which type of following cement is used for mass concrete work a) High Alumina cement b) Quick setting cement c) Rapid hardening cement d) Low heat cement*
Last Answer : d) Low heat cement*
Description : The concrete under water minimum grade of cement recommended by IS code a) M 10 b) M 15 c) M 20* d) M 25
Last Answer : c) M 20*
Description : CC Crib stands for a) Cement concrete b) Criss crossing c) Christ church* d) None of the above
Last Answer : c) Christ church*
Description : Cement pressure grouting is suitable for a) Very fine crack b) weathered concrete c) Active crack where cause of crack is known and remedial action has been taken* d) Crushed masonry
Last Answer : c) Active crack where cause of crack is known and remedial action has been taken
Description : Repairing by cement pressure grouting can be adopted in case of a) Honey comb concrete b) Hollow masonry, Dormant cracks c) Deep leached mortar joints d) all the above*
Last Answer : d) all the above*
Description : UCC is abbreviated for (a) Uncontrolled cement concrete (b) Unified Control Command (c) Unified Command Centre* (d) none of them
Last Answer : (c) Unified Command Centre*
Description : Le Chatelier apparatus is used to determine which of the following properties for cement A) Soundness* b) Initial setting time c) Compressive strength d) Tensile strength
Last Answer : A) Soundness*
Description : fter storage, strength of cement a) Decreases* b) Increases c) Remains same d) Depends upon the type of cement
Last Answer : a) Decreases*
Description : The compressive strength of cement should not be less than about 110Kg/cm2 after three days & not less than 170Kg/cm2 after seven days. The fineness of an ordinary cement as determined by turbidimetric method should be about __________ cm2 /gm. (A) 800 (B) 1600 (C) 4000 (D) 8500
Last Answer : (B) 1600
Description : Ultrasonic Pulse Velocity test is meant for a) Identifying the integrity of concrete* b) Finding the strength of concrete c) To know the crack in steel structure d) To know the flaw in rail
Last Answer : a) Identifying the integrity of concrete*
Description : Rebound hammer is used for a) To find the strength of concrete* b) To form rivet heads c) To break the concrete structures d) None of the above
Last Answer : a) To find the strength of concrete*
Description : Newly constructed pavement with ordinary Portland cement attains its working strength after (A) 7 days (B) 14 days (C) 21 days (D) 28 days
Last Answer : Answer: Option D
Description : In guniting/ shotcreting , water cement ratio is kept as a) 0.4 to 0.5 b) 0.3 to 0.4 c) 0.25 to 0.35 d) 0.35 to 0.5*
Last Answer : d) 0.35 to 0.5*
Description : In cement pressure grouting, water cement ratio is kept as a) 0.4 to 0.5* b) 0.3 to 0.4 c) 0.25 to 0.35 d) 0.35 to 0.5
Last Answer : a) 0.4 to 0.5*
Description : In favourable circumstances a 15 cm concrete cube after 28 days, attains a maximum crushing strength (A) 100 kg/cm2 (B) 200 kg/cm2 (C) 300 kg/cm2 (D) 400 kg/cm
Description : How long will it take for the concrete to achieve 100% of its strength? (A) 7 days (B) 14 days (C) 21 days (D) 28 day
Description : Specified compressive strength of concrete is obtained from cube tests at the end of (A) 3 days (B) 7 days (C) 21 days (D) 28 day
Description : The strength of concrete after one year as compared to 28 days strength is about (A) 10 to 15% more (B) 15 to 20% more (C) 20 to 25% more (D) 25 to 50% more
Last Answer : Answer: Option C
Description : The 28 days cube strength of mass concrete using aggregates of maximum size 5 cm for gravity dams should be (A) Between 150 to 300 kg/cm2 (B) Between 350 to 600 kg/cm2 (C) Between 150 to 500 kg/cm2 (D) Below 200 kg/cm2
Description : At 28 days of curing concrete attains a strength of [ A ] 20 to 25% [ B ] 60 to 70% [ C ] 65 to 80% [ D ] 90 to 95%
Last Answer : [ D ] 90 to 95%
Description : How does the ratio sand to cement effect the strength of concrete?
Last Answer : Need answer
Description : Pick up the incorrect statement from the following. If water cement ratio is (A) Increased, strength of concrete increases (B) Decreased, strength of concrete increases (C) Increased, strength of concrete is not affected (D) None of these
Description : Strength of concrete increases with (A) Increase in water-cement ratio (B) Increase in fineness of cement (C) Decrease in curing time (D) Decrease in size of aggregate
Last Answer : (B) Increase in fineness of cement
Description : The condition not applicable to water cement ratio law, is (A) Internal moisture conditions on hydration continue till complete strength is gained (B) Concrete specimens may be tested at any temperature (C) Concrete specimens need be of same age (D) Concrete specimens need be of same size
Description : According to Water-Cement Ratio Law, the strength of workable plastic concrete (A) Depends upon the amount of water used in the mix (B) Does not depend upon the quality of cement mixed with aggregates (C) Does not depend upon the quantity of cement mixed with aggregates (D) All the above
Description : C.R.R.I. charts are used to obtain a relationship between strength of concrete and (A) Water cement ratio (B) Workability (C) Grading of aggregate (D) Fineness modulus
Last Answer : Answer: Option A
Description : Workability of concrete mix with low water cement ratio is determined by (A) Tensile strength test (B) Slump test (C) Compaction factor test (D) Flexural strength test
Description : The strength of cement concrete increases with (a) The increase of water cement ratio. (b) The decrease of water cement ratio. (c) The increase of cement ratio (d) None of these
Last Answer : (a) The increase of water cement ratio.
Description : According to the rule of water cement ratio, the strength of concrete wholly depends upon. (a) The quality of cement. (b) The quality of cement mixed with aggregate. (c) The amount of water used in preparation of concrete mix. (d) All of the above
Last Answer : (c) The amount of water used in preparation of concrete mix.
Description : High strength of concrete requires a water cement ratio of [ A ] 0.10 to 0.15 [ B ] 0.25 to 0.30 [ C ] 0.45 to 0.60 [ D ] 0.75 to 0.90
Last Answer : [ B ] 0.25 to 0.30
Description : Workability of concrete mix with low water cement ratio is determined by [ A ] Tensile strength test [ B ] Slump cone test [ C ] Compaction factor test [ D ] Flexural strength test
Last Answer : [ C ] Compaction factor test
Description : No of Ingredient of Portion are? (i) Five. (ii) Six (iii) Seven* (iv) Eight
Last Answer : (iii) Seven*
Description : Maximum quantity of water needed per 50 kg of cement for M 15 grade of concrete is (A) 28 liters (B) 30 liters (C) 32 liters (D) 34 liters
Description : A slow setting cement will have higher percentage of a) tricalcium aluminate b) tricalcium silicate c) Gypsum d) Dicalcium silicate*
Last Answer : C2s
Description : The constituent of cement which act as Binders are a) Sand and silica b) Silica and carbon c) tricalcium silicate dicalcium silicate and carbon d) tricalcium aluminate,dicalcium silicate and tricalcium silicate *
Last Answer : d) tricalcium aluminate,dicalcium silicate and tricalcium silicate *
Description : The setting and hardening of cement after addition of water is due to a) Binding action of water b) Evaporation of water c) Hydration and hydrolysis of some constituent compounds of cement* d) Additional hardening compounds added to cement
Last Answer : c) Hydration and hydrolysis of some constituent compounds of cement*
Description : The volume of a bag of cement in cubic meters is about a) 0.035* b) 0.35 c) 0.53 d) .053
Last Answer : a) 0.035*
Description : Soundness test of cement is done to determine its a) Durability in seawater b) Free lime content* c) Iron oxide content d) Alumina content
Last Answer : b) Free lime content*
Description : The main ingredients of Portland cement are a) Lime and silica* b) Lime and Alumina c) Alumina magnesia d) Silica and Alumina
Last Answer : a) Lime and silica*
Description : An artificial stone made from pieces of white marble, white cement and other coloring agents, generally used for floor and facing walls is known as a) Topaz b) Marble c) Terrazzo* d) Gneiss
Last Answer : c) Terrazzo*
Description : Standard bag of cement in ……… kg a) 52 kg b) 30.5kg c) 10.7kg d) 50 kg*
Last Answer : d) 50 kg*
Description : Which cement should not be used for bridge slabs ro RCC frames a) OPC b) Portland Pozzolana cement * c) Portland furnace slag cement d) Rapid hardening cement
Last Answer : b) Portland Pozzolana cement *
Description : In cement pressure grouting G.I pipes of diameter …… and ……length, should be fixed in drilled holes a) 12 to 20 mm, 200 mm* b) 12 to 20 mm, 300 mm c) 12 to 25 mm, 500 mm d) 20 to 25 mm, 300 mm
Last Answer : a) 12 to 20 mm, 200 mm*
Description : In cement pressure grouting holes should be drilled at spacing in both direction at a) 150 – 500 mm b) 450 mm c) 500 – 750 mm* d) 1000 mm
Last Answer : c) 500 – 750 mm*
Description : In cement pressure grouting, pressure is kept as a) 2 to 4 kg./sqcm.* b) 3 to 6 kg./sqcm. c) 3 to 10 kg./sqcm. d) 3.5 to 7 kg./sqcm.
Last Answer : a) 2 to 4 kg./sqcm.*
Description : Number of Elastic clips used for one K to BG single line section having 13 length & concrete sleepers of M+7 sleeper density are (a) 5280 (b) 6160* (c) 6250 (d) 6500
Last Answer : (b) 6160*
Description : The Most common admixture used to accelerate the initial setting of concrete is a) Gypsum b) Calcium chloride* c) Calcium carbonate d) Calcium bicarbonate
Last Answer : b) Calcium chloride*
Description : 1. Which of the statements with regard to formation is correct (1) One of the Functions of the formation is to facilitate drainage (2) Width of bank for double railway line is 12.155 meters (3) Width of cutting for double railway track is 11. ... a) 2, 3, 5 b) 3, 4, 5* c) 2, 3, 4 d) 2, 4, 5
Last Answer : b) 3, 4, 5*
Description : Temporary staging for casting PSC Box Girder for a ROB over the Railway span shall be removed a) after hardening of concrete b) before hardening of concrete c) during concreting d) after stressing the cables
Last Answer : d) after stressing the cables