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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.
| 151. |
To prevent segregation, the maximum height for placing concrete, is |
| A. | 100 cm |
| B. | 125 cm |
| C. | 150 cm |
| D. | 200 cm |
| Answer» B. 125 cm | |
| 152. |
For compacting plain concrete road surface of thickness less than 20 cm, we use |
| A. | internal vibrator |
| B. | screed vibrator |
| C. | form vibrator |
| D. | none of these |
| Answer» C. form vibrator | |
| 153. |
For a simply supported beam of span 15 m, the minimum effective depth to satisfy the vertical deflection limits should be |
| A. | 600 mm |
| B. | 750 mm |
| C. | 900 mm |
| D. | more than 1 m |
| Answer» C. 900 mm | |
| 154. |
is the span) |
| A. | l/3 |
| B. | l/5 |
| C. | l/7 |
| D. | l/10 |
| Answer» D. l/10 | |
| 155. |
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 |
| Answer» D. 16 kg | |
| 156. |
Water cement ratio is |
| A. | volume of water to that of cement |
| B. | weight of water to that of cement |
| C. | weight of concrete to that of water |
| D. | both (a) and (b) of the above |
| Answer» E. | |
| 157. |
According to IS: 4561978, minimum slenderness ratio for a short column is |
| A. | less than 12 |
| B. | less than 18 |
| C. | between 18 and 24 |
| D. | more than 24 |
| Answer» B. less than 18 | |
| 158. |
Sand generally contains salt if it is obtained from: |
| A. | nala beds |
| B. | river beds |
| C. | sea beds |
| D. | none of these |
| Answer» D. none of these | |
| 159. |
A construction joint is provided where |
| A. | bending moment is small |
| B. | shear force is small |
| C. | the member is supported by other member |
| D. | all the above |
| Answer» E. | |
| 160. |
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 days |
| Answer» E. | |
| 161. |
If the permissible stress in steel in tension is 140 N/mm², then the depth of neutral axis for a singly reinforced rectangular balanced section will be |
| A. | 0.35 d |
| B. | 0.40 d |
| C. | 0.45 d |
| D. | dependent on grade of concrete also |
| Answer» C. 0.45 d | |
| 162. |
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 |
| Answer» D. 25 to 50% more | |
| 163. |
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 |
| Answer» B. 40 minutes | |
| 164. |
The property of the ingredients to separate from each other while placing the concrete is called |
| A. | segregation |
| B. | compaction |
| C. | shrinkage |
| D. | bulking |
| Answer» B. compaction | |
| 165. |
Log Angles machine is used to test the aggregate for |
| A. | crushing strength |
| B. | impact value |
| C. | abrasion resistance |
| D. | water absorption |
| Answer» D. water absorption | |
| 166. |
I.S. Sieve Nos. 10 mm and 4.75 mm are generally used for grading of |
| A. | coarse aggregates |
| B. | fine aggregates |
| C. | neither (a) nor (b) |
| D. | both (a) and (b) |
| Answer» E. | |
| 167. |
In a spherical dome the hoop stress due to a concentrated load at crown is |
| A. | compressive everywhere |
| B. | tensile everywhere |
| C. | partly compressive and partly tensile |
| D. | zero |
| Answer» C. partly compressive and partly tensile | |
| 168. |
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. | cement should be mixed by hand in order to maintain uniformity |
| C. | concrete mix should be stored in air-tight containers |
| D. | concrete ingredients should be kept at a temperature of 37° ± 2°c |
| Answer» E. | |
| 169. |
The internal dimensions of a ware house are 15 m × 5.6 m, and the maximum height of piles is 2.70 m, the maximum number of bags to be stored in two piles, are |
| A. | 1500 bags |
| B. | 2000 bags |
| C. | 2500 bags |
| D. | 3000 bags |
| Answer» E. | |
| 170. |
While designing the pile as a column, the end conditions are nearly |
| A. | both ends hinged |
| B. | both ends fixed |
| C. | one end fixed and other end hinged |
| D. | one end fixed and other end free |
| Answer» D. one end fixed and other end free | |
| 171. |
The concrete mix which causes difficulty in obtaining a smooth finish, possess |
| A. | segregation |
| B. | internal friction |
| C. | hardness |
| D. | bleeding |
| Answer» D. bleeding | |
| 172. |
If the size of panel in a flat slab is 6 m × 6 m, then as per Indian Standard Code, the widths of column strip and middle strip are |
| A. | 3.0 m and 1.5 m |
| B. | 1.5 m and 3.0 m |
| C. | 3.0 m and 3.0 m |
| D. | 1.5 m and 1.5 m |
| Answer» D. 1.5 m and 1.5 m | |
| 173. |
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 |
| Answer» D. calcium bicarbonates | |
| 174. |
According to the recommendations of IS : 456-1978, the expansion joints |
| A. | are provided where plane changes abruptly |
| B. | are provided to ensure minimum resistance |
| C. | do not carry reinforcement across them |
| D. | all the above |
| Answer» E. | |
| 175. |
According to IS: 4561978, the maximum reinforcement in a column is |
| A. | 2 % |
| B. | 4 % |
| C. | 6 % |
| D. | 8 % |
| Answer» D. 8 % | |
| 176. |
Setting time of cement increases by adding |
| A. | gypsum |
| B. | hydrogen peroxide |
| C. | calcium chloride |
| D. | sodium oxide |
| Answer» B. hydrogen peroxide | |
| 177. |
The preliminary test is repeated if the difference of compressive strength of three test specimens, exceeds |
| A. | 5 kg/cm2 |
| B. | 8 kg/cm2 |
| C. | 10 kg/cm2 |
| D. | 15 kg/cm2 |
| Answer» E. | |
| 178. |
The factor of safety for |
| A. | steel and concrete are same |
| B. | steel is lower than that for concrete |
| C. | steel is higher than that for concrete |
| D. | none of the above |
| Answer» C. steel is higher than that for concrete | |
| 179. |
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 |
| Answer» E. | |
| 180. |
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 |
| Answer» E. | |
| 181. |
In the method of voids for determination of the quantity of cement paste, it is assumed that |
| A. | voids in coarse aggregates are filled by fine aggregates |
| B. | voids in fine aggregates are filled by the cement paste |
| C. | volume of fine aggregates is equal to total voids in coarse aggregates plus 10% extra |
| D. | all the above |
| Answer» E. | |
| 182. |
Pre-stress loss due to friction occurs |
| A. | only in post-tensioned beams |
| B. | only in pre-tensioned beams |
| C. | in both post-tensioned and pre-tensioned beams |
| D. | none of the above |
| Answer» B. only in pre-tensioned beams | |
| 183. |
As compared to ordinary Portland cement, use of pozzolana cement |
| A. | reduces workability |
| B. | increases bleeding |
| C. | increases shrinkage |
| D. | increases strength |
| Answer» D. increases strength | |
| 184. |
The type of aggregates of same nominal size, which contain less voids when compacted, are |
| A. | rounded spherical |
| B. | irregular |
| C. | flaky |
| D. | none of these |
| Answer» B. irregular | |
| 185. |
Which of the following losses of pre-stress occurs only in pre-tensioning and not in posttensioning? |
| A. | elastic shortening of concrete |
| B. | shrinkage of concrete |
| C. | creep of concrete |
| D. | loss due to friction |
| Answer» B. shrinkage of concrete | |
| 186. |
To obtain a very high strength concrete, use very fine grained |
| A. | granite |
| B. | magnetite |
| C. | barite |
| D. | volcanic scoria |
| Answer» B. magnetite | |
| 187. |
Vicat apparatus is used for |
| A. | fineness test |
| B. | consistency test |
| C. | test for setting time |
| D. | test for tensile strength |
| Answer» C. test for setting time | |
| 188. |
A concrete having a slump of 6.5 cm, is said to be |
| A. | dry |
| B. | earth moist |
| C. | semi-plastic |
| D. | plastic |
| Answer» E. | |
| 189. |
Saw dust can be rendered chemically inert by boiling it in water containing |
| A. | ferrous sulphate |
| B. | potassium chloride |
| C. | ammonia |
| D. | nitric acid |
| Answer» B. potassium chloride | |
| 190. |
If the depth of moist sand in a cylinder is 15 cm and the depth of the sand when fully inundated with water is 12 cm, the bulking of the moist sand, is |
| A. | 10 % |
| B. | 12 % |
| C. | 15 % |
| D. | 25 % |
| Answer» E. | |
| 191. |
For the design of retaining walls, the minimum factor of safety against overturning is taken as |
| A. | 1.5 |
| B. | 2.0 |
| C. | 2.5 |
| D. | 3.0 |
| Answer» C. 2.5 | |
| 192. |
If aggregates completely pass through a sieve of size 75 mm and are retained on a sieve of size 60 mm, the particular aggregate will be flaky if its minimum dimension is less than |
| A. | 20.5 mm |
| B. | 30.5 mm |
| C. | 40.5 mm |
| D. | 50.5 mm |
| Answer» D. 50.5 mm | |
| 193. |
If the foundations of all the columns of a structure are designed on the total live and dead load basis, then |
| A. | there will be no settlement of columns |
| B. | there will be no differential settlement |
| C. | the settlement of exterior columns will be more than interior columns |
| D. | the settlement of interior columns will be more than exterior columns |
| Answer» D. the settlement of interior columns will be more than exterior columns | |
| 194. |
Construction joints are generally provided in concrete |
| A. | roads |
| B. | retaining walls |
| C. | lining of canals |
| D. | all the above |
| Answer» E. | |
| 195. |
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 |
| Answer» B. workability | |
| 196. |
If a grading curve is horizontal between the portions of 20 mm I.S. Sieve and 4.75 mm I.S. Sieve, the graded aggregates do not contain |
| A. | 20 mm particles |
| B. | 10 mm particles |
| C. | 4.75 mm particles |
| D. | all the above |
| Answer» E. | |
| 197. |
Most common method of pre-stressing used for factory production is |
| A. | long line method |
| B. | freyssinet system |
| C. | magnel-blaton system |
| D. | lee-macall system |
| Answer» B. freyssinet system | |
| 198. |
Le-Chatelier's apparatus is used for testing |
| A. | soundness of cement |
| B. | hardness of cement |
| C. | strength of cement |
| D. | durability of cement |
| Answer» B. hardness of cement | |
| 199. |
The risk of segregation is more for |
| A. | wetter mix |
| B. | larger proportion of maximum size aggregate |
| C. | coarser grading |
| D. | all the above |
| Answer» E. | |
| 200. |
The limits of percentage p of the longitudinal reinforcement in a column is given by |
| A. | 0.15% to 2% |
| B. | 0.8% to 4% |
| C. | 0.8% to 6% |
| D. | 0.8% to 8% |
| Answer» D. 0.8% to 8% | |