Description : The process of proper and accurate measurement of concrete ingredients for uniformity of proportion, is known as [ A ] Curing [ B ] Mixing [ C ] Grading [ D ] Batching
Last Answer : [ D ] Batching
Description : The produce impermeable concrete (A) Thorough mixing of concrete is required (B) Proper compaction of concrete is required (C) Proper curing of concrete is required (D) All the above
Last Answer : Answer: Option D
Description : For batching 1:3:6 concrete mix by volume, the ingredients required per bag of 50 kg cement, are: (A) 70 litres of sand and 120 litres of aggregates (B) 70 kg of sand and 140 litres of ... C) 105 litres of sand and 140 litres of aggregates (D) 105 litres of sand and 210 litres of aggregates
Description : Explain the significance of batching, compaction and curing of concrete.
Last Answer : Significance of Batching: 1. If the batching of materials required for concrete is not done appropriately, then random quantity of materials produce non-homogeneous concrete, which further leads to various ... . 3. Curing is necessary to make the concrete impermeable in nature its hardened state.
Description : Pick up the incorrect statement from the following. While performing preliminary test on concrete (A) Proportions of the material and water should be the same as to be used at the work site (B) ... in air-tight containers (D) Concrete ingredients should be kept at a temperature of 37° 2°C
Description : Modulus of elasticity of concrete is primarily influenced by [ A ] Elastic properties of aggregate [ B ] Curing of concrete [ C ] Age of concrete [ D ] Mix proportion and type of cement
Last Answer : [ A ] Elastic properties of aggregate
Description : Batching refers to (A) Controlling the total quantity at each batch (B) Weighing accurately, the quantity of each material for a job before mixing (C) Controlling the quantity of each material ... be added in each batch according to the moisture content of the materials being mixed in the batch
Last Answer : (C) Controlling the quantity of each material into each batch
Description : The following proportion of the ingredients of concrete mix, is not in conformation to arbitrary method of proportioning (A) 1 : 1 : 2 (B) 1 : 2 : 4 (C) 1 : 3 : 6 (D) 1 : 4 : 10
Description : Pick up the correct statement from the following: (A) Plain cement concrete is equally strong in compression as well as in tension (B) Slump test is performed to check concrete strength (C ... D) Fineness modulus is the index number expressing the relative sizes of both coarse and fine aggregates
Last Answer : Option D
Description : The process of mixing clay, water and other ingredients to make brick is known as (A) Kneading (B) Moulding (C) Pugging (D) Drying
Last Answer : Answer: Option A
Description : Proper batching ensures (A) Economy (B) Durability (C) Workability (D) All the above
Last Answer : (D) All the above
Description : The risk of segregation is more for (A) Wetter mix (B) Larger proportion of maximum size aggregate (C) Coarser grading (D) All the above
Description : The process of hardening the concrete by keeping its surface moist is known (A) Placing (B) Wetting (C) Curing (D) Compacting
Last Answer : Answer: Option C
Description : The process of keeping concrete moist for a certain period after its finishing, is known as (A) Finishing of concrete (B) Curing of concrete (C) Placing of concrete (D) Compaction of concrete
Last Answer : Answer: Option B
Description : The harmonious mixing of the clay ingredients, is known as (A) Weathering (B) Blending (C) Tempering (D) None of these
Description : The process of consolidating concrete mix after placing it in position is termed as. (a) Curing (b) Wetting (c) Compaction (d) All of these
Last Answer : (c) Compaction
Description : The process of conversion of plastic concrete to solid stage is called [ A ] Hydration [ B ] Hardening [ C ] Setting [ D ] Curing
Last Answer : [ C ] Setting
Description : The process of keeping the concrete structure moist is called [ A ] Hydration [ B ] Curing [ C ] Creep [ D ] Shrinkage
Last Answer : [ B ] Curing
Description : The process of hardening of concrete in the presence of water is called [ A ] Creep [ B ] Hydration [ C ] Shrinkage [ D ] Curing
Last Answer : [ B ] Hydration
Description : Grading of sand causes great variation in (A) Workability of concrete (B) Strength of concrete (C) Durability of concrete (D) All the above
Description : The strength and quality of concrete, depend upon: (A) Grading of aggregates (B) Surface area of aggregates (C) Shape of aggregates (D) All the above
Description : Pick up the correct statement from the following: (A) Continuous grading is not necessary for obtaining a minimum of air voids (B) The omission of a certain size of aggregate is shown by ... in concrete increases the workability but also increases the liability to segregation (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
Description : Workability of concrete is directly proportional to (A) Aggregate cement ratio (B) Time of transit (C) Grading of the aggregate (D) All of above
Description : The strength of durability of concrete depends upon. (a) Size of aggregates (b) Grading of aggregates (c) Moisture contents of aggregates (d) All of these.
Last Answer : (d) All of these.
Description : The strength and quality of concrete depends upon (i)Grading of aggregates (ii)Shape of aggregates (iii)Surface area of aggregates (iv)Surface texture of aggregates [ A ] i, ii and iv [ B ] ii, iii and iv [ C ] i, iii and iv [ D ] i, ii, iii and iv
Last Answer : [ D ] i, ii, iii and iv
Description : The process of mixing, transporting, placing and compacting concrete using Ordinary Port land Cement should not take more than (A) 30 minutes (B) 40 minutes (C) 60 minutes (D) 90 minutes
Description : The process of mixing, transporting, placing and compacting the cement, concrete should not take more than. (a) 30 minutes (b) 60minutes (c) 90 minutes (d) 120mm
Last Answer : (a) 30 minutes
Description : For the supply of materials for concrete, form work reinforcing and placing of concrete, removal of form work and curing of concrete, number of bar(s) required on bar chart, is (A) 1 (B) 2 (C) 3 (D) 4
Last Answer : (A) 1
Description : Which one of the following represents an activity? (A) Excavation for foundation (B) Curing of concrete (C) Setting of question paper (D) All the above
Description : Curing (A) Reduces the shrinkage of concrete (B) Preserves the properties of concrete (C) Prevents the loss of water by evaporation (D) All of the above
Last Answer : (D) All of the above
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 : For providing a raft foundation, the following activities are involved 1. Ramming the foundation bed 2. Excavation of the soil upto required depth 3. Laying the reinforcement over the foundation bed 4. Curing the cement concrete placed over ... 2, 1 (C) 2, 1, 3, 5, 4 (D) 3, 2, 5, 1, 4
Description : Modulus of elasticity of concrete is increased with (a) Higher W/C ratio (b) Shorter curing period (c) Lesser vibration (d) Increase in age
Last Answer : (d) Increase in age
Description : The object of curing is to (a) Prevent the loss of water by evaporation. (b) Reduce the shrinkage of concrete (c) Preserve the properties of concrete (d) All of these
Last Answer : (d) All of these
Description : Blast furnace slag cement concrete requires ___________time for shuttering and curing. (a) Less (b) More (c) Medium (d) All the above
Last Answer : (b) More
Description : For Ordinary Portland cement concrete exposed to dry and hot weather conditions, good moist curing period is [ A ] 7 days [ B ] 10 days [ C ] 14 days [ D ] None of the above
Last Answer : [ B ] 10 days
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 : The Criteria For Grading Should Be Options: A) The Material Is Covered In An Accurate Manner. B) The Writing Communicates Clearly And Effectively. C) Is There Any Originality In The Submitted Work. D) All Of These.
Last Answer : D) All Of These.
Description : Batching error means inaccuracy in the quantity of (A) Aggregates (B) Cement (C) Water (D) All the above
Description : If an ideal solution is formed by mixing two pure liquids in any proportion, then the __________ of mixing is zero (A) Enthalpy (B) Volume (C) Both 'a' & 'b' (D) Neither 'a' nor 'b'
Last Answer : (C) Both 'a' & 'b'
Description : Combustion is the ideal air/fuel ratio where a. the mixing proportion is correct, b. the fuel is completely burned c. the oxygen is entirely consumed d. All of the above
Last Answer : d. All of the above
Description : While designing an air entrained concrete (A) Water cement ratio is reduced (B) Proportion of aggregates is reduced (C) An allowance for the entrained air is made (D) All the above
Description : The proportion of coarse aggregates to fire aggregates in structural concrete is usually [ A ] 0.50 - 1.25 [ B ] 1.25 - 4.50 [ C ] 1.50 - 2.50 [ D ] 0.25 - 0.75
Last Answer : [ C ] 1.50 - 2.50
Description : In case of hand mixing of concrete, the extra cement to be added is (A) 5 % (B) 10 % (C) 15 % (D) 20 %
Last Answer : (B) 10 %
Description : The impurity of mixing water which affects the setting time and strength of concrete, is (A) Sodium sulphates (B) Sodium chlorides (C) Sodium carbonates and bicarbonates (D) Calcium bicarbonates
Description : Water used for mixing concrete should be [ A ] Slightly acidic [ B ] Free from bacteria [ C ] Distilled [ D ] Potable
Last Answer : [ D ] Potable
Description : Water used for mixing of concrete should be free from (i)Oils (ii)Salts (iii)Acids [ A ] i [ B ] iii [ C ] i and iii [ D ] i, ii and iii
Last Answer : [ D ] i, ii and iii
Description : The ratio of various ingredients (cement, sand, aggregates) in concrete of grade M 200, is (A) 1 : 2 : 4 (B) 1 : 3 : 6 (C) 1 : 1½ : 3 (D) 1 : 1 : 2
Last Answer : (C) 1 : 1½ : 3
Description : Pick up the correct statement from the following: (A) The weight of ingredients of concrete mix, is taken in kilograms (B) Water and aggregates are measured in litres (C) 20 bags of cement make one tonne (D) All the above