Description : For the construction of R.C.C. slabs, columns, beams, walls, etc. the grade of concrete mix used, is (A) 1 : 3 : 6 (B) 1 : 1½ : 3 (C) 1 : 2 : 4 (D) 1 : 1 : 2
Last Answer : (C) 1 : 2 : 4
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 : Construction joints are generally provided in concrete (A) Roads (B) Retaining walls (C) Lining of canals (D) All the above
Last Answer : Answer: Option D
Description : Suggest the minimum grade of concrete for following exposure condition. i) RCC work ii) Water retaining structure iii) Sea water construction iv) Pre-stressed concrete
Last Answer : Minimum grade of concrete for following exposure condition: i) RCC work = M 20 ii) Water retaining structure = M 25 iii) Sea water construction = M 20 for PCC and M 30 for RCC iv) Pre-stressed concrete = M 30
Description : Stones used for the construction of retaining walls must be (A) Soft (B) Hard (C) Light (D) Heavy
Description : There are two hinged semicircular arches A, B and C of radii 5 m, 7.5 m and 10 m respectively and each carries a concentrated load W at their crowns. The horizontal thrust at their supports will be in the ratio of (A) 1 ... (B) 2 : 1½ : 1 (C) 1 : 1 : 2 (D) None of these
Last Answer : (C) 1 : 1 : 2
Description : The ratio of circumferential stress to the longitudinal stress in the walls of a cylindrical shell, due to flowing liquid, is (A) ½ (B) 1 (C) 1½ (D) 2
Last Answer : (D) 2
Description : Keeping the instrument height as 1½ m, length of staff 4 m, the up gradient of the ground 1 in 10, the sight on the up slope must be less than (A) 25 cm (B) 20 m (C) 45 m (D) 10 m
Last Answer : (C) 45 m
Description : If 50 kg of fine aggregates and 100 kg of coarse aggregates are mixed in a concrete whose water cement ratio is 0.6, the weight of water required for harsh mix, is (A) 8 kg (B) 10 kg (C) 12 kg (D) 14 kg
Last Answer : Answer: Option C
Description : In a construction site, a crane lifts 1000 kg of concrete mix to roof top at a height of 20 meters in 50 seconds. If the value of gravity 'g' due to earth is 10 m s-2, the power of elevator will be. -Physics
Last Answer : 4 KW (kilowatt)
Description : For the construction of cement concrete floor, the maximum permissible size of aggregate, is (A) 4 mm (B) 6 mm (C) 8 mm (D) 10 mm
Description : For the construction of thin R.C.C. structures, the type of cement to be avoided, is (A) Ordinary Portland cement (B) Rapid hardening cement (C) Low heat cement (D) Blast furnace slag cement
Description : For construction of structures under water, the type of lime used, is (A) Hydraulic lime (B) Fat lime (C) Quick lime (D) Pure lime
Last Answer : Answer: Option A
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 : M 150 grade of concrete approximates (A) 1 : 3 : 6 mix (B) 1 : 1 :2 mix (C) 1 : 2 : 4 mix (D) 1 : 1.5 : 3 mix
Last Answer : (B) 1 : 1 :2 mix
Description : M10 grade of concrete approximates (A) 1 : 3 : 6 mix (B) 1 : 1 : 2 mix (C) 1 : 2 : 4 mix (D) 1 : 1.5 : 3 mix
Description : For a concrete mix 1:3:6 and water cement ratio 0.6 both by weight, the quantity of water required per bag, is (A) 10 kg (B) 12 kg (C) 14 kg (D) 16 kg
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 : 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 : Pick up the incorrect statement from the following: (A) Concrete for which preliminary tests are conducted, is called controlled concrete (B) Bulking of sand depends upon the fineness of grains (C) Concrete mix 1 : 6 : 12, is used for mass concrete in piers (D) All the above
Description : For highly loaded columns, the concrete mix used is (a) 1:1:2 (b) 1:1.5:2 (c) 1:2:4 (d) 1:3:6
Last Answer : (a) 1:1:2
Description : For mass concrete in piers and abutments, the grade of concrete mix used, is (a) 1:1:2 (b) 1:1.5:2 (c) 1:2:4 (d) 1:3:6
Last Answer : (d) 1:3:6
Description : The ratio of differenct ingredients (cement, sand and aggregate) in concrete mix of grade M20 is. (a) 1:1:2 (b) 1:1.5:2 (c) 1:2:4 (d) 1:3:6
Last Answer : (b) 1:1.5:2
Description : Which of the following R.C. retaining walls is suitable for heights beyond 6 m? (A) L-shaped wall (B) T-shaped wall (C) Counterfort type (D) All of the above
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 : To indicate proper control of consistency of a freshly mixed concrete for pavement construction, the slump should be between (A) 3 to 5 cm (B) 4 to 6 cm (C) 5 to 7 cm (D) 7 to 10 cm
Description : Knowledge of hydrology is necessary for civil engineers for (A) Designing and construction of irrigation structures (B) Designing and construction of bridges and culverts (C) Flood control works (D) All the above
Description : Pozzolana cement is used with confidence for construction of (A) Dams (B) Massive foundations (C) R.C.C. structures (D) All the above
Last Answer : (D) All the above
Description : Construction joints are provided (A) Where B.M. and S.F. are small (B) Where the member is supported by other member (C) At 18 m apart in huge structures (D) All the above
Description : For construction of structures in sea water, the cement generally preferred to, is (A) Portland-pozzolana cement (B) Quick setting cement (C) Low heat Portland cement (D) Rapid hardening cement
Description : In designing concrete structures, normally maximum aggregate sizes are adopted with ranges from 10mm to 20mm. Does an increase of maximum aggregate size benefit the structures?
Last Answer : To answer this question, let's consider an example of a cube. The surface area to volume ratio of a cube is 6/b where b is the length of the cube. This implies that ... requirement can offset the disadvantages brought about by discontinuities as suggested by Longman Scientific and Technical (1987).
Description : Joints in concrete structures, are provided (A) To reduce the tensile stresses likely to be developed due to evaporation of water (B) To minimise the change in the dimensions of the slab (C) To minimise the necessary cracking (D) All the above
Description : Expansion joints are provided if the length of concrete structures exceeds (A) 10 m (B) 15 m (C) 15 m (D) 45 m
Description : Pick up the correct statement from the following: (A) For thin structures subjected to wetting and drying, the water cement ratio should be 0.45 (B) For mass concrete structures subjected to wetting and ... under water, the water-cement ratio by weight should be 0.55 (D) All the above
Description : Which of the following cements is suitable for use in massive concrete structures such as large dams? (A) Ordinary Portland cement (B) Low heat cement (C) Rapid hardening cement (D) Sulphate resisting cement
Description : Which of the following statements is correct? (a) Sulphate resisting cement is particularly used for canal lining. (b) Low heat cement should not be used for thin concrete structures. (c) Rapid hardening cement should not be used for massive concrete structures (d) All of the above
Last Answer : (d) All of the above
Description : The theoretical stress-strain curve of the concrete in the Limit State design of structures is correspondingly reduced by the factor [ A ] 0.35 [ B ] 0.5 [ C ] 0.67 [ D ] 0.75
Last Answer : [ C ] 0.67
Description : Select the incorrect statement [ A ] R.C.C has better fire resistance than steel [ B ] R.C.C. structure is economical than steel structure [ C ] Strength of concrete decreases as age increases [ D ] R.C.C can be used for under water and marine structures
Last Answer : [ C ] Strength of concrete decreases as age increases
Description : To have pressure wholly compressive under the base of a retaining wall of width b, the resultant of the weight of the wall and the pressure exerted by the retained, earth should have eccentricity not more than (A) b/3 (B) b/4 (C) b/5 (D) b/6
Description : Cantilever retaining walls can safely be used for a height not more than (A) 3 m (B) 4 m (C) 5 m (D) 6 m
Description : The stem of a cantilever retaining wall which retains earth level with top is 6 m. If the angle of repose and weight of the soil per cubic metre are 30° and 2000 kg respectively, the effective width of the stem at the bottom, is (A) 51.5 (B) 52.5 (C) 53.5 (D) 54.5
Description : For M 150 mix concrete, according to I.S. specifications, local bond stress, is (A) 5 kg/cm2 (B) 10 kg/cm2 (C) 15 kg/cm2 (D) 20 kg/cm
Description : Which of the following represents a carpet of sand-bitumen mix without coarse aggregates? (A) Mastic asphalt (B) Sheet asphalt (C) Bituminous carpet (D) Bituminous concrete
Description : The shrinkage of concrete (A) Is proportional to water content is the mix (B) Is proportional to cement concrete (C) Increases with age of concrete (D) All the above
Description : 1% of voids in a concrete mix would reduce its strength by about (A) 5 % (B) 10 % (C) 15 % (D) 20 %
Last Answer : (A) 5 %
Description : After casting, an ordinary cement concrete on drying (A) Expands (B) Mix (C) Shrinks (D) None of these
Last Answer : (C) Shrinks
Description : Pick up the correct statement from the following: (A) Insufficient quantity of water makes the concrete mix harsh (B) Insufficient quantity of water makes the concrete unworkable (C) Excess quantity of water makes the concrete segregated (D) All the above
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
Description : If the slump of a concrete mix is 60 mm, its workability is (A) Very low (B) Low (C) Medium (D) High