MCQOPTIONS
Saved Bookmarks
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.
| 251. |
The surface where two successive placements of concrete meet, is known as |
| A. | contraction joint |
| B. | expansion joint |
| C. | construction joint |
| D. | both (a) and (b) |
| Answer» D. both (a) and (b) | |
| 252. |
A concrete using an air entrained cement |
| A. | has strength less than 10% to 15% |
| B. | has more resistance to weathering |
| C. | is more plastic and workable |
| D. | is free from segregation and bleeding |
| Answer» D. is free from segregation and bleeding | |
| 253. |
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 |
| Answer» E. | |
| 254. |
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 |
| Answer» D. all of the above | |
| 255. |
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 aggregates |
| C. | 105 litres of sand and 140 litres of aggregates |
| D. | 105 litres of sand and 210 litres of aggregates |
| Answer» E. | |
| 256. |
Concrete mainly consists of |
| A. | cement |
| B. | aggregates |
| C. | water |
| D. | all the above |
| Answer» E. | |
| 257. |
Water cement ratio is generally expressed in volume of water required per |
| A. | 10 kg |
| B. | 20 kg |
| C. | 30 kg |
| D. | 50 kg |
| Answer» E. | |
| 258. |
The average permissible stress in bond for plain bars in tension is |
| A. | increased by 10% for bars in compression |
| B. | increased by 25% for bars in compression |
| C. | decreased by 10% for bars in compression |
| D. | decreased by 25% for bars in compression |
| Answer» C. decreased by 10% for bars in compression | |
| 259. |
To ensure constant moisture content in aggregates |
| A. | area of each aggregate pile should be large |
| B. | height of each aggregate pile should not exceed 1.50 m |
| C. | aggregate pile should be left for 24 hours before aggregates are used |
| D. | all the above |
| Answer» E. | |
| 260. |
Under normal conditions using an ordinary cement, the period of removal of the form work, is: |
| A. | 7 days for beam soffits |
| B. | 14 days for bottom slabs of spans 4.6 m and more |
| C. | 21 days for bottom beams over 6 m spans |
| D. | all the above |
| Answer» E. | |
| 261. |
In a counterfort retaining wall, the main reinforcement in the stem at mid span is provided on |
| A. | front face only |
| B. | inner face only |
| C. | both front face and inner face |
| D. | none of the above |
| Answer» B. inner face only | |
| 262. |
To hydrate 500kg of cement full water needed, is |
| A. | 100 kg |
| B. | 110 kg |
| C. | 120 kg |
| D. | 130 kg |
| Answer» E. | |
| 263. |
For the construction of cement concrete dams, the maximum permissible size of the aggregates, is |
| A. | 40 mm |
| B. | 50 mm |
| C. | 60 mm |
| D. | 70 mm |
| Answer» B. 50 mm | |
| 264. |
The slab is designed as one way if the ratio of long span to short span is |
| A. | less than 1 |
| B. | between 1 and 1.5 |
| C. | between 1.5 and 2 |
| D. | greater than 2 |
| Answer» E. | |
| 265. |
The individual variation between test strength of sample should not be more than |
| A. | ±5 % of average |
| B. | ± 10 % of average |
| C. | ± 15 % of average |
| D. | ±20 % of average |
| Answer» D. ±20 % of average | |
| 266. |
In slump test, each layer of concrete is compacted by a steel rod 60 cm long and of 16 mm diameter for |
| A. | 20 times |
| B. | 25 times |
| C. | 30 times |
| D. | 50 times |
| Answer» C. 30 times | |
| 267. |
Allowable shear strength of concrete, depends upon |
| A. | shear strength |
| B. | tensile strength |
| C. | compressive strength |
| D. | none of these |
| Answer» B. tensile strength | |
| 268. |
For a reinforced concrete section, the shape of shear stress diagram is |
| A. | wholly parabolic |
| B. | wholly rectangular |
| C. | parabolic above neutral axis and rectangular below neutral axis |
| D. | rectangular above neutral axis and parabolic below neutral axis |
| Answer» D. rectangular above neutral axis and parabolic below neutral axis | |
| 269. |
Admixtures which cause early setting and hardening of concrete are called |
| A. | workability admixtures |
| B. | accelerators |
| C. | retarders |
| D. | air entraining agents |
| Answer» C. retarders | |
| 270. |
If the various concrete ingredients i.e. cement, sand and aggregates are in the ratio of 1:3:6, the grade of concrete, is |
| A. | m 100 |
| B. | m 150 |
| C. | m 200 |
| D. | m 250 |
| Answer» B. m 150 | |
| 271. |
Tricalcium aluminate (C3A) |
| A. | reacts fast with water |
| B. | generates less heat of hydration |
| C. | causes initial setting and early strength of cement |
| D. | does not contribute to develop ultimate strength |
| Answer» C. causes initial setting and early strength of cement | |
| 272. |
To determine the modulus of rupture, the size of test specimen used is |
| A. | 150 × 150 × 500 mm |
| B. | 100 × 100 × 700 mm |
| C. | 150 × 150 × 700 mm |
| D. | 100 × 100 × 500 mm |
| Answer» D. 100 × 100 × 500 mm | |
| 273. |
Concrete gains strength due to |
| A. | chemical reaction of cement with sand and coarse aggregates |
| B. | evaporation of water from concrete |
| C. | hydration of cement |
| D. | all the above |
| Answer» D. all the above | |
| 274. |
Which of the following has high tensile strength? |
| A. | plain hot rolled wires |
| B. | cold drawn wires |
| C. | heat treated rolled wires |
| D. | all have same tensile strength |
| Answer» C. heat treated rolled wires | |
| 275. |
The main object of compaction of concrete, is: |
| A. | to eliminate air holes |
| B. | to achieve maximum density |
| C. | to provide intimate contact between the concrete and embedded materials |
| D. | all the above |
| Answer» E. | |
| 276. |
The bulk density of aggregates, depends upon |
| A. | shape |
| B. | grading |
| C. | compaction |
| D. | all the above |
| Answer» E. | |
| 277. |
In symmetrically reinforced sections, shrinkage stresses in concrete and steel are respectively |
| A. | compressive and tensile |
| B. | tensile and compressive |
| C. | both compressive |
| D. | both tensile |
| Answer» C. both compressive | |
| 278. |
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 |
| Answer» B. quick setting cement | |
| 279. |
Pick up the correct statement from the following: |
| A. | the maximum size of a coarse aggregate, is 75 mm and minimum 4.75 mm |
| B. | the maximum size of the fine aggregate, is 4.75 mm and minimum 0.075 mm |
| C. | the material having particles of size varying from 0.06 mm to 0.002 mm, is known as silt |
| D. | all the above |
| Answer» E. | |
| 280. |
Curing of pavements, floors, roofs and slabs, is done by |
| A. | membrane method |
| B. | ponding method |
| C. | covering surface with bags |
| D. | sprinkling water method |
| Answer» C. covering surface with bags | |
| 281. |
Addition of pozzolana to ordinary port land cement, causes |
| A. | decrease in early strength |
| B. | reduction in chemical action with sulphates |
| C. | increase in shrinkage |
| D. | all the above |
| Answer» E. | |
| 282. |
Pick up the incorrect statement from the following: |
| A. | space between the exterior walls of a warehouse and bag piles should be 30 cm |
| B. | cement bags should preferably be piled on wooden planks |
| C. | width and height of the pile should not exceed 3 m and 2.70 m respectively |
| D. | none of these |
| Answer» E. | |
| 283. |
Workability of concrete is directly proportional to |
| A. | aggregate cement ratio |
| B. | time of transit |
| C. | grading of the aggregate |
| D. | all of above |
| Answer» D. all of above | |
| 284. |
For a slab supported on its four edges with corners held down and loaded uniformly, the Marcus correction factor to the moments obtained by Grashoff Rankine's theory |
| A. | is always less than 1 |
| B. | is always greater than 1 |
| C. | can be more than 1 |
| D. | can be less than 1 |
| Answer» B. is always greater than 1 | |
| 285. |
For road pavements, the cement generally used, is |
| A. | ordinary portland cement |
| B. | rapid hardening cement |
| C. | low heat cement |
| D. | blast furnace slag cement |
| Answer» C. low heat cement | |
| 286. |
Critical section for shear in case of flat slabs is at a distance of |
| A. | effective depth of slab from periphery of column/drop panel |
| B. | d/2 from periphery of column/capital/ drop panel |
| C. | at the drop panel of slab |
| D. | at the periphery of column |
| Answer» C. at the drop panel of slab | |
| 287. |
For concreting of heavily reinforced sections without vibration, the workability of concrete expressed as compacting factor should be |
| A. | 0.75 - 0.80 |
| B. | 0.80 - 0.85 |
| C. | 0.85 - 0.92 |
| D. | above 0.92 |
| Answer» E. | |
| 288. |
Due to circumferential action of the spiral in a spirally reinforced column |
| A. | capacity of column is decreased |
| B. | ductility of column reduces |
| C. | capacity of column is decreased but ductility of column increases |
| D. | both the capacity of column and ductility of column increase |
| Answer» E. | |
| 289. |
Select the correct statement |
| A. | elastic modulus of high tensile steel is nearly the same as that of mild steel |
| B. | elastic modulus of high tensile steel is more than that of mild steel |
| C. | carbon percentage in high carbon steel is less than that in mild steel |
| D. | high tensile steel is cheaper than mild steel |
| Answer» B. elastic modulus of high tensile steel is more than that of mild steel | |
| 290. |
The purpose of reinforcement in pre-stressed concrete is |
| A. | to provide adequate bond stress |
| B. | to resist tensile stresses |
| C. | to impart initial compressive stress in concrete |
| D. | all of the above |
| Answer» D. all of the above | |
| 291. |
Due to shrinkage stresses, a simply supported beam having reinforcement only at bottom tends to |
| A. | deflect downward |
| B. | deflect upward |
| C. | deflect downward or upward |
| D. | none of the above |
| Answer» B. deflect upward | |
| 292. |
In counterfort retaining walls, the main reinforcement in the stem at support is |
| A. | not provided |
| B. | provided only on inner face |
| C. | provided only on front face |
| D. | provided both on inner and front faces |
| Answer» C. provided only on front face | |
| 293. |
According to IS: 4561978, the column or the strut is the member whose effective length is greater than |
| A. | the least lateral dimension |
| B. | 2 times the least lateral dimension |
| C. | 3 times the least lateral dimension |
| D. | 4 times the least lateral dimension |
| Answer» D. 4 times the least lateral dimension | |
| 294. |
When shear stress exceeds the permissible limit in a slab, then it is reduced by |
| A. | increasing the depth |
| B. | providing shear reinforcement |
| C. | using high strength steel |
| D. | using thinner bars but more in number |
| Answer» B. providing shear reinforcement | |
| 295. |
Diagonal tension in a beam |
| A. | is maximum at neutral axis |
| B. | decreases below the neutral axis and increases above the neutral axis |
| C. | increases below the neutral axis and decreases above the neutral axis |
| D. | remains same |
| Answer» D. remains same | |
| 296. |
Bulking of sand is maximum if moisture content is about |
| A. | 2 % |
| B. | 4 % |
| C. | 6 % |
| D. | 10 % |
| Answer» C. 6 % | |
| 297. |
The diameter of ties in a column should be |
| A. | more than or equal to one fourth of diameter of main bar |
| B. | more than or equal to 5 mm |
| C. | more than 5 mm but less than one-fourth of diameter of main bar |
| D. | more than 5 mm and also more than one-fourth of diameter of main bar |
| Answer» E. | |
| 298. |
The temperature reinforcement in the vertical slab of a T-shaped R.C. retaining wall is |
| A. | not needed |
| B. | provided equally on inner and front faces |
| C. | provided more on inner face than on front face |
| D. | provided more on front face than on inner face |
| Answer» E. | |