MCQOPTIONS
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MCQOPTIONS
This section includes 298 Mcqs, each offering curated multiple-choice questions to sharpen your Civil Engineering knowledge and support exam preparation. Choose a topic below to get started.
| 201. |
Di-calcium silicate (C2S) |
| A. | hydrates rapidly |
| B. | generates less heat of hydration |
| C. | hardens rapidly |
| D. | provides less ultimate strength to cement |
| Answer» C. hardens rapidly | |
| 202. |
Slump test is done for |
| A. | clay |
| B. | sand |
| C. | lime |
| D. | concrete |
| Answer» E. | |
| 203. |
According to IS: 4561978, the flexural strength of concrete is |
| A. | directly proportional to compressive strength |
| B. | inversely proportional to compressive strength |
| C. | directly proportional to square root of compressive strength |
| D. | inversely proportional to square root of compressive strength |
| Answer» D. inversely proportional to square root of compressive strength | |
| 204. |
The entrained air in concrete |
| A. | increases workability |
| B. | decreases workability |
| C. | decreases resistance to weathering |
| D. | increases strength |
| Answer» B. decreases workability | |
| 205. |
The main reason for providing number of reinforcing bars at a support in a simply supported beam is to resist in that zone |
| A. | compressive stress |
| B. | shear stress |
| C. | bond stress |
| D. | tensile stress |
| Answer» D. tensile stress | |
| 206. |
The size of fine aggregates does not exceed |
| A. | 2.75 mm |
| B. | 3.00 mm |
| C. | 3.75 mm |
| D. | 4.75 mm |
| Answer» E. | |
| 207. |
Workability of concrete is measured by |
| A. | vicat apparatus test |
| B. | slump test |
| C. | minimum void method |
| D. | talbot richard test |
| Answer» C. minimum void method | |
| 208. |
For a longitudinal reinforcing bar in a column, the minimum cover shall neither be less than the diameter of bar nor less than |
| A. | 15 mm |
| B. | 25 mm |
| C. | 30 mm |
| D. | 40 mm |
| Answer» E. | |
| 209. |
Bulking of sand is |
| A. | mixing of different sizes of sand particles |
| B. | mixing of lime with sand |
| C. | maximum water with sand |
| D. | swelling of sand when wetted |
| Answer» E. | |
| 210. |
The maximum amount of dust which may be permitted in aggregates is |
| A. | 5% of the total aggregates for low workability with a coarse grading |
| B. | 10% of the total aggregates for low workability with a fine grading |
| C. | 20% of the total aggregates for a mix having high workability with fine grading |
| D. | all the above |
| Answer» E. | |
| 211. |
As compared to ordinary Portland cement, high alumina cement has |
| A. | higher initial setting time but lower final setting time |
| B. | lower initial setting time but higher final setting time |
| C. | higher initial and final setting times |
| D. | lower initial and final setting times |
| Answer» B. lower initial setting time but higher final setting time | |
| 212. |
Cement used for normal concrete construction, is obtained by burning a mixture of |
| A. | siliceous and argillaceous materials |
| B. | argillaceous and calcareous materials |
| C. | siliceous and calcareous materials |
| D. | siliceous, argillaceous and calcareous materials |
| Answer» E. | |
| 213. |
Permissible compressive strength of M 150 concrete grade is |
| A. | 100 kg/cm2 |
| B. | 150 kg/cm2 |
| C. | 200 kg/cm2 |
| D. | 250 kg/cm2 |
| Answer» D. 250 kg/cm2 | |
| 214. |
Select the incorrect statement |
| A. | lean mixes bleed more as compared to rich ones. |
| B. | bleeding can be minimized by adding pozzolana finer aggregate |
| C. | bleeding can be increased by addition \of calcium chloride |
| D. | none of the above |
| Answer» E. | |
| 215. |
An excess of flaky particles in concrete aggregates |
| A. | decreases the workability |
| B. | increases the quantity of water and sand |
| C. | more than 15% are not desirable |
| D. | all the above |
| Answer» E. | |
| 216. |
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 |
| Answer» E. | |
| 217. |
Increase in the moisture content in concrete |
| A. | reduces the strength |
| B. | increases the strength |
| C. | does not change the strength |
| D. | all of the above |
| Answer» B. increases the strength | |
| 218. |
The commercial name of white and coloured cement in India, is |
| A. | colorcrete |
| B. | silvicrete |
| C. | snowcem |
| D. | all the above |
| Answer» E. | |
| 219. |
The maximum percentage of chemical ingredient of cement is that of |
| A. | magnesium oxide |
| B. | iron oxide |
| C. | silica |
| D. | lime |
| Answer» E. | |
| 220. |
The type of aggregates not suitable for high strength concrete and for pavements subjected to tension, is |
| A. | rounded aggregate |
| B. | irregular aggregate |
| C. | angular aggregate |
| D. | flaky aggregate |
| Answer» B. irregular aggregate | |
| 221. |
The effect of creep on modular ratio is |
| A. | to decrease it |
| B. | to increase it |
| C. | either to decrease or to increase it |
| D. | to keep it unchanged |
| Answer» C. either to decrease or to increase it | |
| 222. |
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 |
| Answer» D. flexural strength test | |
| 223. |
An aggregate is known as cyclopean aggregate if its size is more than |
| A. | 4.75 mm |
| B. | 30 mm |
| C. | 60 mm |
| D. | 75 mm |
| Answer» E. | |
| 224. |
Pick up the incorrect statement applicable to the field test of good cement. |
| A. | when one thrusts one\s hand into a bag of cement, one should feel warm |
| B. | the colour of the cement is bluish |
| C. | by rubbing cement in between fingers, one should feed rough |
| D. | all the above |
| Answer» E. | |
| 225. |
Minimum pitch of transverse reinforcement in a column is |
| A. | the least lateral dimension of the member |
| B. | sixteen times the smallest diameter of longitudinal reinforcement bar to be tied |
| C. | forty-eight times the diameter of transverse reinforcement |
| D. | lesser of the above three values |
| Answer» E. | |
| 226. |
For given workability the grading requiring the least amount of water is one that gives |
| A. | greatest surface area for the given cement and aggregates |
| B. | least surface area for the given cement and aggregates |
| C. | least weight for the given cement and aggregates |
| D. | greatest weight for the given cement and aggregates |
| Answer» B. least surface area for the given cement and aggregates | |
| 227. |
Efflorescence in cement is caused due to an excess of |
| A. | alumina |
| B. | iron oxide |
| C. | silica |
| D. | alkalis |
| Answer» E. | |
| 228. |
The aggregate impact value of the aggregate used in |
| A. | building concrete is less than 45 |
| B. | road pavement concrete is less than 30 |
| C. | runway concrete is less than 30 |
| D. | all the above |
| Answer» E. | |
| 229. |
For walls, columns and vertical faces of all structural members, the form work is generally removed after |
| A. | 24 to 48 hours |
| B. | 3 days |
| C. | 7 days |
| D. | 14 days |
| Answer» B. 3 days | |
| 230. |
Finer grinding of cement |
| A. | affects only the early development of strength |
| B. | affects only the ultimate strength |
| C. | both (a) and (b) |
| D. | does not affect the strength |
| Answer» B. affects only the ultimate strength | |
| 231. |
The light weight aggregates are obtained from |
| A. | sedimentary rocks |
| B. | metamorphic rocks |
| C. | igneous rocks |
| D. | volcanic source |
| Answer» E. | |
| 232. |
For preparing ordinary concrete, the quantity of water used, is |
| A. | 5% by weight of aggregates plus 20% of weight of cement |
| B. | 10% by weight of aggregates plus 10% of weight of cement |
| C. | 5% by weight of aggregates plus 30% of weight of cement |
| D. | 30% by weight of aggregates plus 10% of weight of cement |
| Answer» D. 30% by weight of aggregates plus 10% of weight of cement | |
| 233. |
Workability of concrete for a given water content is good if the aggregates, are |
| A. | rounded aggregate |
| B. | irregular aggregate |
| C. | angular aggregate |
| D. | flaky aggregates |
| Answer» B. irregular aggregate | |
| 234. |
The property of fresh concrete, in which the water in the mix tends to rise to the surface while placing and compacting, is called |
| A. | segregation |
| B. | bleeding |
| C. | bulking |
| D. | creep |
| Answer» C. bulking | |
| 235. |
If the effective plan area of a warehouse is 54 sq. m, and maximum height of piles permitted is 270 cm, the number of cement bags to be stored, is |
| A. | 2000 bags |
| B. | 2200 bags |
| C. | 2400 bags |
| D. | 2700 bags |
| Answer» E. | |
| 236. |
Internal friction between the ingredients of concrete, is decreased by using |
| A. | less water |
| B. | fine aggregates |
| C. | rich mix |
| D. | more water and coarse aggregates |
| Answer» E. | |
| 237. |
Pick up the correct proportions of chemical ingredients of cement |
| A. | lime : silica : alumina : iron oxide : 63 : 22 : 6 : 3 |
| B. | silica : lime : alumina : iron oxide : 63 : 22 : 6 : 3 |
| C. | alumina : silica : lime : iron oxide : 63 : 22 : 6 : 3 |
| D. | iron oxide : alumina : silica : lime : 63 : 22 : 6 : 3 |
| Answer» B. silica : lime : alumina : iron oxide : 63 : 22 : 6 : 3 | |
| 238. |
According to ISI recommendations, the maximum depth of stress block for balanced section of a beam of effective depth d is |
| A. | 0.43 d |
| B. | 0.55 d |
| C. | 0.68 d |
| D. | 0.85 d |
| Answer» B. 0.55 d | |
| 239. |
The aggregate containing moisture in pores and having its surface dry, is known as |
| A. | moist aggregates |
| B. | very dry aggregates |
| C. | dry aggregates |
| D. | saturated surface dry aggregate |
| Answer» E. | |
| 240. |
In T-shaped R C. retaining walls, the main reinforcement in the stem is provided on |
| A. | the front face in one direction |
| B. | the front face in both directions |
| C. | the inner face in one direction |
| D. | the inner face in both directions |
| Answer» D. the inner face in both directions | |
| 241. |
The lower water cement ratio in concrete, introduces |
| A. | smaller creep and shrinkage |
| B. | greater density and smaller permeability |
| C. | improved frost resistance |
| D. | all the above |
| Answer» E. | |
| 242. |
Concrete containing |
| A. | siliceous aggregates, has higher co-efficient of expansion |
| B. | igneous aggregates, has intermediate coefficient of expansion |
| C. | lime stones, has lowest co-efficient of expansion |
| D. | all the above |
| Answer» E. | |
| 243. |
Ratio of permissible stress in direct compression and bending compression is |
| A. | less than 1 |
| B. | between 1 and 1.5 |
| C. | between 1.5 and 2.0 |
| D. | greater than 2 |
| Answer» B. between 1 and 1.5 | |
| 244. |
The dimensions of a 35 litre forma for measuring aggregates by volume, are: |
| A. | length 30 cm, breadth 25 cm, height 30 cm |
| B. | length 39 cm, breadth 25 cm, height 32 cm |
| C. | length 27 cm, breadth 27 cm, height 48 cm |
| D. | length 220 cm, breadth 25 cm, height 40 cm |
| Answer» D. length 220 cm, breadth 25 cm, height 40 cm | |
| 245. |
The cement whose strength is a little lower than the ordinary cement during the first three months but attains afterwards the same strength, is known as |
| A. | low-heat portland cement |
| B. | rapid hardening portland cement |
| C. | portland blast slag cement |
| D. | portland pozzolana cement |
| Answer» B. rapid hardening portland cement | |
| 246. |
'Ware house pack' of cement means |
| A. | full capacity of the ware house |
| B. | pressure exertion of the bags of upper layers |
| C. | pressure compaction of the bags on lower layers |
| D. | packing the ware house |
| Answer» D. packing the ware house | |
| 247. |
Ultimate strength of cold drawn high steel wires |
| A. | increases with increase in diameter of bar |
| B. | decreases with increase in diameter of bar |
| C. | does not depend on diameter of bar |
| D. | none of the above |
| Answer» C. does not depend on diameter of bar | |
| 248. |
Particles of 0.002 mm size are that of |
| A. | clay |
| B. | sand |
| C. | gravel |
| D. | none of these |
| Answer» B. sand | |
| 249. |
High carbon content in the steel causes |
| A. | decrease in tensile strength but increase in ductility |
| B. | increase in tensile strength but decrease in ductility |
| C. | decrease in both tensile strength and ductility |
| D. | increase in both tensile strength and ductility |
| Answer» C. decrease in both tensile strength and ductility | |
| 250. |
A beam curved in plan is designed for |
| A. | bending moment and shear |
| B. | bending moment and torsion |
| C. | shear and torsion |
| D. | bending moment, shear and torsion |
| Answer» E. | |