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MCQOPTIONS
This section includes 185 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. |
Cement used for normal concrete construction, is obtained by burning a mixture of |
| A. | silicious and argillaceous materials |
| B. | argilaceous and calcareous materials |
| C. | silicious and catcareous materials |
| D. | silicious, argillaceous and calcareous materials |
| Answer» E. | |
| 152. |
The standard sand now a days used in India, is obtained from |
| A. | Jaipur (Rajasthan) |
| B. | Jullundur (Punjab) |
| C. | Hyderabad (Andhra Pradesh) |
| D. | Ennore (Madras) |
| Answer» E. | |
| 153. |
Sands of zone I are |
| A. | coarse |
| B. | medium |
| C. | medium to fine |
| D. | fine. |
| Answer» B. medium | |
| 154. |
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» B. a vertical line | |
| 155. |
According to I.S. : 456, the number of grades of concrete mixes, is |
| A. | 3 |
| B. | 4 |
| C. | 5 |
| D. | 6 |
| Answer» E. | |
| 156. |
The aggregate containing moisture in pores and having its suface dry, is known as |
| A. | moist aggregates |
| B. | very dry aggregates |
| C. | dry aggregates |
| D. | saturated surface dry aggregate |
| Answer» E. | |
| 157. |
Percentage of pozzolanic material containing clay upto 80% used for the manufacture of pozzolana cement, is |
| A. | 0.3 |
| B. | 0.4 |
| C. | 0.5 |
| D. | 0.6 |
| Answer» B. 0.4 | |
| 158. |
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. | |
| 159. |
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. | |
| 160. |
Slump test of concrete is a meausre ofits |
| A. | consistency |
| B. | compressive strength |
| C. | tensile strength |
| D. | impact value. |
| Answer» B. compressive strength | |
| 161. |
The compaction of concrete, improves |
| A. | density |
| B. | strength |
| C. | durability |
| D. | all the above. |
| Answer» E. | |
| 162. |
The commonly used material in the manufacture of cement is |
| A. | sand stone |
| B. | slate |
| C. | lime stone |
| D. | graphite. |
| Answer» D. graphite. | |
| 163. |
If fineness modulus of sand is 2.5, it is graded as |
| A. | very fine sand |
| B. | fine sand |
| C. | medium sand |
| D. | coarse sand |
| Answer» C. medium sand | |
| 164. |
To obtain cement dry powder, lime stones and shales or their slurry, is burnt in a rotary kiln at a temperature between |
| A. | 1100° and 1200°C |
| B. | 1200° and 1300°C |
| C. | 1300° and 1400°C |
| D. | 1400° and 1500°C |
| Answer» E. | |
| 165. |
Concrete containing |
| A. | silicious 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. | |
| 166. |
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. | are supported on separate columns |
| D. | do not carry reinforcement across them |
| Answer» E. | |
| 167. |
Curing a concrete for long period ensures better |
| A. | volume stability |
| B. | strength |
| C. | water resistance |
| D. | water tightness and durability |
| Answer» E. | |
| 168. |
For a good concrete |
| A. | aggregates should be hard and durable |
| B. | cement should be sufficient to produce the required strength |
| C. | water should be free from organic materials |
| D. | mixing of ingredients should be done thoroughly so as to produce homogeneity |
| Answer» E. | |
| 169. |
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. | |
| 170. |
Transport of concrete by pumps, is done for a distance of |
| A. | 100 m |
| B. | 200 m |
| C. | 300 m |
| D. | 400 m |
| Answer» E. | |
| 171. |
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. | |
| 172. |
After casting, an ordinary cement concrete on drying |
| A. | expands |
| B. | mix |
| C. | shrinks |
| D. | none of these. |
| Answer» D. none of these. | |
| 173. |
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» E. | |
| 174. |
If 1500 g of water is required to have a cement paste 1875 g of normal consistency, the percentage of water is, |
| A. | 0.2 |
| B. | 0.25 |
| C. | 0.3 |
| D. | 0.35 |
| Answer» C. 0.3 | |
| 175. |
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» C. 200 kg/cm2 | |
| 176. |
For given water content, workability decreases if the concrete aggregates contain an excess of |
| A. | thin particles |
| B. | flat particles |
| C. | elongated particles |
| D. | flaky paticles |
| Answer» E. | |
| 177. |
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» B. 1 : 1 : 2 mix | |
| 178. |
Concrete is unsuitable for compaction by a vibrator if it is |
| A. | dry |
| B. | earth moist |
| C. | semi-plastic |
| D. | plastic |
| Answer» E. | |
| 179. |
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. | conical heaps of aggregates should be avoided to prevent moisture variation |
| Answer» E. | |
| 180. |
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. | 2 days for vertical sides of columns |
| Answer» E. | |
| 181. |
Wp and Wf are the weights of a cylinder containing partially compacted and fully compacted concrete. If the compaction factor is 0.95, the workability of concrete is |
| A. | extremely low |
| B. | very low |
| C. | low |
| D. | high |
| Answer» E. | |
| 182. |
Construction joints are provided |
| A. | where B.M. and S.F. are small |
| B. | where the member is supported by other member |
| C. | at 18 m apart in huge structures |
| D. | in concrete wall at sill level of windows |
| Answer» E. | |
| 183. |
Separation of coarse aggregates from mortar during transportation, is known |
| A. | bleeding |
| B. | creeping |
| C. | segregation |
| D. | shrinkage |
| Answer» D. shrinkage | |
| 184. |
Concrete mainly consists of |
| A. | cement |
| B. | aggregates |
| C. | admixture |
| D. | water |
| Answer» E. | |
| 185. |
For quality control of Portland cement, the test essentially done is |
| A. | setting time |
| B. | soundness |
| C. | tensile strength |
| D. | consistency |
| Answer» E. | |