McqMate
These multiple-choice questions (MCQs) are designed to enhance your knowledge and understanding in the following areas: Civil Engineering .
| 151. |
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» A. 30 minutes | |
| 152. |
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» C. 20 to 25% more | |
| 153. |
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» D. 28 days | |
| 154. |
Pick up the incorrect statement from the following: |
| A. | tricalcium silicate (c3s) hydrates rapidly |
| B. | tricalcium silicate (c3s) generates more heat of hydration |
| C. | tricalcium silicate (c3s) develops early strength |
| D. | tricalcium silicate (c3s) has more resistance to sulphate attack |
| Answer» D. tricalcium silicate (c3s) has more resistance to sulphate attack | |
| 155. |
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» B. 0.40 d | |
| 156. |
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» D. all the above | |
| 157. |
Sand generally contains salt if it is obtained from: |
| A. | nala beds |
| B. | river beds |
| C. | sea beds |
| D. | none of these |
| Answer» C. sea beds | |
| 158. |
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» A. less than 12 | |
| 159. |
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» D. both (a) and (b) of the above | |
| 160. |
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» C. 14 kg | |
| 161. |
is the span) |
| A. | l/3 |
| B. | l/5 |
| C. | l/7 |
| D. | l/10 |
| Answer» C. l/7 | |
| 162. |
Pick up the incorrect statement from the following: |
| A. | in properly graded aggregates, bulk density is more |
| B. | in single size aggregates, bulk density is least |
| C. | in single size aggregates, bulk density is maximum |
| D. | none of these |
| Answer» C. in single size aggregates, bulk density is maximum | |
| 163. |
To prevent segregation, the maximum height for placing concrete, is |
| A. | 100 cm |
| B. | 125 cm |
| C. | 150 cm |
| D. | 200 cm |
| Answer» A. 100 cm | |
| 164. |
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» B. 750 mm | |
| 165. |
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» B. screed vibrator | |
| 166. |
Expansion joints are provided if the length of concrete structures exceeds |
| A. | 10 m |
| B. | 15 m |
| C. | 15 m |
| D. | 45 m |
| Answer» D. 45 m | |
| 167. |
The permissible diagonal tensile stress in reinforced brick work is |
| A. | about 0.1 n/mm² |
| B. | zero |
| C. | 0.3 n/mm² to 0.7 n/mm² |
| D. | about 1.0 n/mm² |
| Answer» A. about 0.1 n/mm² | |
| 168. |
Pick up the correct statement from the following: |
| A. | the concrete gains strength due to hydration of cement |
| B. | the concrete does not set at freezing point |
| C. | the strength of concrete increases with its age |
| D. | all the above |
| Answer» D. all the above | |
| 169. |
Separation of water or water sand cement from a freshly concrete, is known |
| A. | bleeding |
| B. | creeping |
| C. | segregation |
| D. | flooding |
| Answer» A. bleeding | |
| 170. |
The critical section for finding maximum bending moment for footing under masonry wall is located |
| A. | at the middle of the wall |
| B. | at the edge of the wall |
| C. | halfway between the middle and edge of the wall |
| D. | at a distance equal to effective depth of footing from the edge of the wall |
| Answer» C. halfway between the middle and edge of the wall | |
| 171. |
On a grading curve, the gap grading is represented by |
| A. | a horizontal line |
| B. | a vertical line |
| C. | n.w. inclined line |
| D. | n.e. inclined line |
| Answer» A. a horizontal line | |
| 172. |
High temperature |
| A. | increases the strength of concrete |
| B. | decreases the strength of concrete |
| C. | has no effect on the strength of concrete |
| D. | none of these |
| Answer» B. decreases the strength of concrete | |
| 173. |
Horizontal construction joints in concrete walls are generally provided at |
| A. | soffit level |
| B. | window sill level |
| C. | floor level |
| D. | all the above |
| Answer» D. all the above | |
| 174. |
Stress strain curve of high tensile steel |
| A. | has a definite yield point |
| B. | does not show definite yield point but yield point is defined by 0.1% proof stress |
| C. | does not show definite yield point but yield point is defined by 0.2% proof stress |
| D. | does not show definite yield point but yield point is defined by 2% proof stress, |
| Answer» C. does not show definite yield point but yield point is defined by 0.2% proof stress | |
| 175. |
Addition of pozzolana to cement causes |
| A. | reduction in permeability |
| B. | loss of heat of hydration |
| C. | reduction in bleeding |
| D. | all the above |
| Answer» D. all the above | |
| 176. |
Permissible compressive strength of M 200 concrete grade is |
| A. | 100 kg/cm2 |
| B. | 150 kg/cm2 |
| C. | 200 kg/cm2 |
| D. | 250 kg/cm2 |
| Answer» C. 200 kg/cm2 | |
| 177. |
The minimum diameter of longitudinal bars in a column is |
| A. | 6 mm |
| B. | 8 mm |
| C. | 12 mm |
| D. | 16 mm |
| Answer» C. 12 mm | |
| 178. |
The high strength of rapid hardening cement at early stage, is due to its |
| A. | finer grinding |
| B. | burning at high temperature |
| C. | increased lime cement |
| D. | higher content of tricalcium |
| Answer» C. increased lime cement | |
| 179. |
Sand requiring a high water cement ratio, belongs to |
| A. | zone i |
| B. | zone ii |
| C. | zone iii |
| D. | zone iv |
| Answer» A. zone i | |
| 180. |
Minimum grade of concrete to be used in reinforced concrete as per IS: 4561978 is |
| A. | m 15 |
| B. | m 20 |
| C. | m 10 |
| D. | m 25 |
| Answer» A. m 15 | |
| 181. |
While compacting the concrete by a mechanical vibrator, the slump should not exceed |
| A. | 2.5 cm |
| B. | 5.0 cm |
| C. | 7.5 cm |
| D. | 10 cm |
| Answer» B. 5.0 cm | |
| 182. |
Non-uniform compaction may cause the concrete |
| A. | porous |
| B. | non-homogeneous |
| C. | reduced strength |
| D. | all the above |
| Answer» D. all the above | |
| 183. |
Modulus of rupture of concrete is a measure of |
| A. | flexural tensile strength |
| B. | direct tensile strength |
| C. | compressive strength |
| D. | split tensile strength |
| Answer» A. flexural tensile strength | |
| 184. |
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 |
| Answer» A. 1 : 3 : 6 mix | |
| 185. |
Higher workability of concrete is required if the structure is |
| A. | made with cement concrete |
| B. | thick and reinforced |
| C. | thin and heavily reinforced |
| D. | thick and heavily reinforced |
| Answer» D. thick and heavily reinforced | |
| 186. |
For a cantilever of effective depth of 0.5 m, the maximum span to satisfy vertical deflection limit is |
| A. | 3.5 m |
| B. | 4 m |
| C. | 4.5 m |
| D. | 5 m |
| Answer» A. 3.5 m | |
| 187. |
The bulk density of aggregates does not depend upon: |
| A. | size and shape of aggregates |
| B. | specific gravity of aggregates |
| C. | grading of aggregates |
| D. | size and shape of the container |
| Answer» D. size and shape of the container | |
| 188. |
How long will it take for the concrete to achieve 100% of its strength? |
| A. | 7 days |
| B. | 14 days |
| C. | 21 days |
| D. | 28 days |
| Answer» D. 28 days | |
| 189. |
A higher modular ratio shows |
| A. | higher compressive strength of concrete |
| B. | lower compressive strength of concrete |
| C. | higher tensile strength of steel |
| D. | lower tensile strength of steel |
| Answer» B. lower compressive strength of concrete | |
| 190. |
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 |
| Answer» D. 10 mm | |
| 191. |
The specifications of a cement bag for storage, are |
| A. | weight 50 kg |
| B. | height 18 cm |
| C. | plan area 3000 sq. cm |
| D. | all the above |
| Answer» D. all the above | |
| 192. |
The main reinforcement in the heel of a T-shaped R.C. retaining wall is provided on |
| A. | top face perpendicular to wall |
| B. | bottom face perpendicular to wall |
| C. | both top and bottom faces perpendicular to wall |
| D. | none of the above |
| Answer» A. top face perpendicular to wall | |
| 193. |
Separation of coarse aggregates from mortar during transportation, is known |
| A. | bleeding |
| B. | creeping |
| C. | segregation |
| D. | shrinkage |
| Answer» C. segregation | |
| 194. |
A flaky aggregate is said to be elongated if its length is |
| A. | equal to the mean size |
| B. | twice the mean size |
| C. | thrice the mean size |
| D. | four times the mean size |
| Answer» B. twice the mean size | |
| 195. |
You are asked to construct a massive dam, the type of cement you will use, is |
| A. | ordinary portland cement |
| B. | rapid hardening cement |
| C. | low heat cement |
| D. | blast furnace slag cement |
| Answer» C. low heat cement | |
| 196. |
An ideal ware house, is provided |
| A. | water proof masonry walls |
| B. | water proof roof |
| C. | few windows which remain generally closed |
| D. | all the above |
| Answer» D. all the above | |
| 197. |
Normally pre-stressing wires are arranged in the |
| A. | upper part of the beam |
| B. | lower part of the beam |
| C. | center |
| D. | anywhere |
| Answer» B. lower part of the beam | |
| 198. |
Pick up the correct statement from the following: |
| A. | bulking of sand is caused due to formation of a thin film of surface moisture |
| B. | fine sand bulks more than coarse sand |
| C. | the volume of fully saturated sand, is equal to the volume of dry and loose sand |
| D. | all the above |
| Answer» D. all the above | |
| 199. |
The minimum percentage of chemical ingredient of cement is that of |
| A. | magnesium oxide |
| B. | iron oxide |
| C. | alumina |
| D. | lime |
| Answer» A. magnesium oxide | |
| 200. |
Poisson's ratio for concrete |
| A. | remains constant |
| B. | increases with richer mixes |
| C. | decreases with richer mixes |
| D. | none of the above |
| Answer» B. increases with richer mixes | |
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