McqMate
These multiple-choice questions (MCQs) are designed to enhance your knowledge and understanding in the following areas: Civil Engineering .
| 151. |
Which cement is used for works economic where considerations is predominant? Reservoirs, retaining walls, swimming pools, dams, bridges, piers etc. |
| A. | Waterproof Portland Cement |
| B. | Colored Cement |
| C. | High Alumina Cement |
| D. | Blast Furnace Slag Cement |
| Answer» D. Blast Furnace Slag Cement | |
| 152. |
How many times in each layer of concrete rodded in a slump cone? |
| A. | 75 |
| B. | 25 |
| C. | 12 to 15 |
| D. | 35 to 65 |
| Answer» B. 25 | |
| 153. |
If L1=Measurement taken after 24 hours of immersion in water at a temp. of 27 ± 20oC and L2=Measurement taken after 3 hours of immersion in water at boiling temperature. Then what is soundness of cement? |
| A. | L1+L2 |
| B. | L1/L2 |
| C. | L1-L2 |
| D. | L1*L2 |
| Answer» C. L1-L2 | |
| 154. |
Which of the following option is correct? |
| A. | Standard consistency (%) = (wt of water added/ wt of cement) *100 |
| B. | Standard consistency (%) = (wt of water added- wt of cement) *100 |
| C. | Standard consistency = (wt of water added/ wt of cement) *100 |
| D. | Standard consistency (%) = (wt cement/ wt of water) *100 |
| Answer» A. Standard consistency (%) = (wt of water added/ wt of cement) *100 | |
| 155. |
According to geological origin, aggregates is/are classified into __________ types. |
| A. | 1 |
| B. | 2 |
| C. | 3 |
| D. | 4 |
| Answer» B. 2 | |
| 156. |
Crushed stone, gravel and ordinary sand are examples of ___________ |
| A. | Lightweight aggregate |
| B. | Normal-weight aggregate |
| C. | Heavy-weight aggregate |
| D. | Both Normal-weight aggregate and Heavy-weight aggregate |
| Answer» B. Normal-weight aggregate | |
| 157. |
Which type of aggregate is shown below? |
| A. | Angular aggregate |
| B. | Rounded aggregate |
| C. | Flaky aggregate |
| D. | Irregular or partially aggregate |
| Answer» C. Flaky aggregate | |
| 158. |
The rock which is not calcareous, is : |
| A. | lime stone |
| B. | Macl |
| C. | Chalk |
| D. | Laterite |
| Answer» D. Laterite | |
| 159. |
The main object of compaction of concrete, is: |
| A. | to eliminate air holes |
| B. | to achieve maximum density |
| C. | to provide initimate contact between the concrete and embedded materials |
| D. | all the above. |
| Answer» D. all the above. | |
| 160. |
Grading of aggregates should be continuous for |
| A. | lean |
| B. | rich |
| Answer» A. lean | |
| 161. |
The aggregates of |
| A. | irregular |
| B. | angular |
| C. | rounded |
| D. | flaky |
| Answer» B. angular | |
| 162. |
Which of the following ingredient of cement when added in excess quantity, causes the cement to set slowly? |
| A. | Lime |
| B. | silica |
| C. | alumina |
| D. | iron oxide |
| Answer» B. silica | |
| 163. |
An aggregate having all the pores filled with water but having dry surface is called |
| A. | very dry aggregate |
| B. | dry aggregate |
| C. | saturated surface dry aggregate |
| D. | moist aggregate |
| Answer» C. saturated surface dry aggregate | |
| 164. |
The internal friction between the ingredients of concrete is minimised by |
| A. | adopting coarse aggregates |
| B. | using more water |
| C. | reducing the surface area |
| D. | all of these |
| Answer» D. all of these | |
| 165. |
The light-weight concrete is prepared by |
| A. | mixing Portland cement with sawdust in specified proportion in the concrete |
| B. | using coke-breeze, cinder or slag as aggregate in the concrete |
| C. | mixing aluminium in the concrete |
| D. | none of tha above |
| Answer» B. using coke-breeze, cinder or slag as aggregate in the concrete | |
| 166. |
For compacting plain concrete or one-way reinforced concrete floors, the vibrator used is |
| A. | internal vibrator |
| B. | screed vibrator |
| C. | form vibrator |
| D. | all of these |
| Answer» B. screed vibrator | |
| 167. |
The surface moisture of aggregates increases the water-cement ratio in the mix and thus |
| A. | increases |
| B. | decreases |
| Answer» B. decreases | |
| 168. |
For compacting large sections of mass concrete in structures, the type of vibrator used is |
| A. | internal vibrator |
| B. | screed vibrator |
| C. | both (a) and (b) |
| D. | either (a) or (b) |
| Answer» A. internal vibrator | |
| 169. |
The presence of |
| A. | sodium carbonate and bicarbonate |
| B. | calcium chloride |
| C. | sodium chloride |
| D. | sodium sulphate |
| Answer» A. sodium carbonate and bicarbonate | |
| 170. |
The tetra calcium alumino ferrite in cement has |
| A. | good |
| B. | poor |
| Answer» B. poor | |
| 171. |
For reinforced concrete, the aggregate used is |
| A. | sand |
| B. | gravel |
| C. | crushed rock |
| D. | all of these |
| Answer» D. all of these | |
| 172. |
The lime concrete has |
| A. | less |
| B. | more |
| C. | same |
| Answer» A. less | |
| 173. |
The steel mould used for slump test is in the form of a |
| A. | cube |
| B. | cylinder |
| C. | frustrum of a cone |
| D. | none of these |
| Answer» C. frustrum of a cone | |
| 174. |
In order to avoid segregation, the concrete should not be thrown from a height. |
| A. | Agree |
| B. | Disagree |
| Answer» A. Agree | |
| 175. |
Water cement ratio may be defined as the ratio of |
| A. | volume of water to that of cement in a concrete mix |
| B. | weight of water to that of cement in a concrete mix |
| C. | volume of water to that of concrete in a concrete mix |
| D. | weight of water to that of concrete in a concrete mix |
| Answer» B. weight of water to that of cement in a concrete mix | |
| 176. |
Low heat cement contains more lime than ordinary Portland cement. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 177. |
For concreting of tunnel lining, the concrete is transported by |
| A. | pumps |
| B. | pans |
| C. | wheel barrows |
| D. | containers |
| Answer» A. pumps | |
| 178. |
For the improvement of workability of concrete, the shape of aggregate recommended is |
| A. | irregular |
| B. | angular |
| C. | round |
| D. | flaky |
| Answer» C. round | |
| 179. |
Which of the following statement is correct? |
| A. | Larger the size of coarse aggregate, lesser is the quantity of fine aggregate and of cement required. |
| B. | If very dry aggregates are used, the workability of the mix is likely to be reduced |
| C. | Bulking is caused due to the formation of thin film of surface moisture around the sand particles. |
| D. | all of the above |
| Answer» D. all of the above | |
| 180. |
For a structure subjected to the action of sea water, the cement used is |
| A. | rapid hardening cement |
| B. | low heat cement |
| C. | high alumina cement |
| D. | sulphate resisting cement |
| Answer» C. high alumina cement | |
| 181. |
For high degree of workability, the slump value should vary between |
| A. | 0 to 25 mm |
| B. | 25 to 50 mm |
| C. | 50 to 80 mm |
| D. | 80 to 100 mm |
| Answer» D. 80 to 100 mm | |
| 182. |
The term 'ware-hourse pack' means |
| A. | the total capacity of ware-house |
| B. | packing of ware-house |
| C. | pressure compaction of bags on lower layers |
| D. | pressure exertion of bags on upper layers |
| Answer» C. pressure compaction of bags on lower layers | |
| 183. |
The length of Vicat plunger in Vicat's apparatus varies from |
| A. | 20 to 30 mm |
| B. | 30 to 40 mm |
| C. | 40 to 50 mm |
| D. | 50 to 60 mm |
| Answer» C. 40 to 50 mm | |
| 184. |
The cement concrete prepared by mixing aluminium in it, is called |
| A. | air-entrained concrete |
| B. | cellular concrete |
| C. | aerated concrete |
| D. | any one of the above |
| Answer» D. any one of the above | |
| 185. |
Plain cement concrete is strong in taking |
| A. | tensile stress |
| B. | compressive stress |
| C. | shear stress |
| D. | all of these |
| Answer» B. compressive stress | |
| 186. |
As per IS : 459-1978, the concrete mixes are designated into |
| A. | 4 grades |
| B. | 5 grades |
| C. | 6 grades |
| D. | 7 grades |
| Answer» D. 7 grades | |
| 187. |
The factor which effect the quality of compaction, is |
| A. | density of concrete |
| B. | strength of concrete |
| C. | durability of concrete |
| D. | all of these |
| Answer» D. all of these | |
| 188. |
The top diameter, bottom diameter and height of the mould used for slump test are respectively |
| A. | 100 mm, 200 mm, 300 mm |
| B. | 200 mm, 100 mm, 300 mm |
| C. | 200 mm, 300 mm, 100 mm |
| D. | 100 mm, 300 mm, 200 mm |
| Answer» A. 100 mm, 200 mm, 300 mm | |
| 189. |
The aggregate which pass through 75 mm IS sieve and entirely retain on 4.75 mm IS sieve is known as |
| A. | cyclopean aggregate |
| B. | coarse aggregate |
| C. | fine aggregate |
| D. | all-in-aggregate |
| Answer» B. coarse aggregate | |
| 190. |
The rate of hydration is |
| A. | directly |
| B. | inversely |
| Answer» A. directly | |
| 191. |
Weight batching is done by |
| A. | spring dial scale |
| B. | platform weighing machine |
| C. | portable weigh batchers |
| D. | all of these |
| Answer» D. all of these | |
| 192. |
The first compound which reacts with water when mixed with cement is tricalcium aluminate. |
| A. | Correct |
| B. | Incorrect |
| Answer» A. Correct | |
| 193. |
An aggregate which may contain some moisture in the pores but having dry surface is known as |
| A. | very dry aggregate |
| B. | dry aggregate |
| C. | saturated surface dry aggregate |
| D. | moist aggregate |
| Answer» B. dry aggregate | |
| 194. |
Proper curing of cement concrete, is good for its |
| A. | volume stability |
| B. | strength |
| C. | wear resistance |
| D. | all of these |
| Answer» D. all of these | |
| 195. |
Hydration of cement is due to the chemical action of water with |
| A. | dicalcium silicate |
| B. | tricalcium silicate |
| C. | tricalcium aluminate |
| D. | all of these |
| Answer» D. all of these | |
| 196. |
The cement concrete in which high compressive stresses are artificially induced before its actual use, is called |
| A. | plain cement concrete |
| B. | reinforced cement concrete |
| C. | prestressed cement concrete |
| D. | lime concrete |
| Answer» C. prestressed cement concrete | |
| 197. |
The fineness modulus of an aggregate is roughly proportional to |
| A. | specific gravity of the aggregate |
| B. | shape of the aggregate |
| C. | average size of particles in the aggregate |
| D. | grading of the aggregate |
| Answer» C. average size of particles in the aggregate | |
| 198. |
The water used for ordinary concrete is equal to 5% by weight of aggregate plus |
| A. | 10% |
| B. | 20% |
| C. | 30% |
| D. | 40% |
| Answer» C. 30% | |
| 199. |
Which of the following statement is wrong? |
| A. | The concrete can not be pumped. |
| B. | The concrete should have maximum creep. |
| C. | The concrete structures can be put to use immediately ater their construction. |
| D. | all of the above |
| Answer» D. all of the above | |
| 200. |
The sound absorption coefficient of light weight concrete is nearly |
| A. | twice |
| B. | three times |
| C. | four times |
| D. | six times |
| Answer» A. twice | |
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