McqMate
These multiple-choice questions (MCQs) are designed to enhance your knowledge and understanding in the following areas: Civil Engineering .
| 101. |
What are plasticizers? |
| A. | Which adds water for workability |
| B. | Which reduces water for workability |
| C. | Which decreases workability at the same water content |
| D. | Which oxidizes water for workability |
| Answer» B. Which reduces water for workability | |
| 102. |
What is the amount used of plasticizers in cement by weight? |
| A. | 0 |
| B. | 1-.4% |
| C. | 1% |
| D. | 1-2% |
| Answer» B. 1-.4% | |
| 103. |
What is the allowed reduction of water with super plasticizers without reducing workability? |
| A. | 10% |
| B. | 20% |
| C. | 30% |
| D. | 40% |
| Answer» C. 30% | |
| 104. |
What is accelerator? |
| A. | Which speed up the initial set of concrete |
| B. | Which delays the initial set of concrete |
| C. | Which speed up the final set of concrete |
| D. | Which delays the final set of concrete |
| Answer» A. Which speed up the initial set of concrete | |
| 105. |
What is retender? |
| A. | Which speed up the initial set of concrete |
| B. | Which delays the initial set of concrete |
| C. | Which speed up the final set of concrete |
| D. | Which delays the final set of concrete |
| Answer» B. Which delays the initial set of concrete | |
| 106. |
NaOH is the example of retenders. |
| A. | True |
| B. | False |
| C. | none |
| D. | all |
| Answer» B. False | |
| 107. |
Pick up the correct statement from the following. |
| A. | Calcium fluosilicates act as a retarders |
| B. | CaCl2 acts as a retarders |
| C. | Gypsum acts as a retarders |
| D. | Gypsum acts as an accelerators |
| Answer» C. Gypsum acts as a retarders | |
| 108. |
Retarders used at grouting oil wells, where temperature is about _____________ oC. |
| A. | 100 |
| B. | 150 |
| C. | 200 |
| D. | 250 |
| Answer» C. 200 | |
| 109. |
Silica fume is ______________ |
| A. | Less reactive |
| B. | Neutral |
| C. | More reactive |
| D. | Absent in concrete |
| Answer» C. More reactive | |
| 110. |
What is the content of SiO2 in fly ash? |
| A. | 30-60% |
| B. | 15-30% |
| C. | Up to 30% |
| D. | 1-7% |
| Answer» A. 30-60% | |
| 111. |
Air entrainment in concrete increases ___________ |
| A. | Strength |
| B. | Workability |
| C. | The effect of temp variations |
| D. | The unit weight |
| Answer» B. Workability | |
| 112. |
What is curing? |
| A. | Dehydration |
| B. | Hydration |
| C. | Drying |
| D. | Dipping |
| Answer» B. Hydration | |
| 113. |
What is the gel/space ratio? |
| A. | Volume of water to the volume of cement |
| B. | Volume of the hydrated cement paste to the sum of volumes of the hydrated cement |
| C. | Volume of the hydrated cement paste to the sum of volumes of the hydrated cement and of the capillary pores |
| D. | Volume of gel to the volume of space present in the concrete |
| Answer» C. Volume of the hydrated cement paste to the sum of volumes of the hydrated cement and of the capillary pores | |
| 114. |
Gel/Space ratio = x = Volume of gel / Space available = 0.657 C / 0.319 C+ Wo. Here Wo stands for? |
| A. | Weight of cement in kg |
| B. | Weight of cement in g |
| C. | Volume of gel |
| D. | Volume of mixing water in ml |
| Answer» D. Volume of mixing water in ml | |
| 115. |
This strain increases over time due to _________ |
| A. | Creep |
| B. | Elastic modulus |
| C. | Short term modulus of elasticity |
| D. | Long term modulus of elasticity |
| Answer» A. Creep | |
| 116. |
If the stress is removed, the specimen shows an instantaneous recovery strain ___ the elastic strain on loading. |
| A. | Higher than |
| B. | Lower than |
| C. | Equal to |
| D. | Much greater than |
| Answer» B. Lower than | |
| 117. |
Creep ___ as the age of application of load _____ |
| A. | Increase, increase |
| B. | Increase, decrease |
| C. | Decrease, decrease |
| D. | Decrease, increase |
| Answer» D. Decrease, increase | |
| 118. |
Shrinkage is the reduction in the volume of a fresh hardened concrete exposed to ambient temp and humidity. |
| A. | True |
| B. | False |
| C. | none |
| D. | all |
| Answer» A. True | |
| 119. |
Durability of concrete is proportional to _________ |
| A. | Sand content |
| B. | Water cement ratio |
| C. | Aggregate ratio |
| D. | Cement aggregate ratio |
| Answer» D. Cement aggregate ratio | |
| 120. |
For concrete exposed to a very aggressive environment the w/c should be lower than __________ |
| A. | 1 |
| B. | .5 |
| C. | 4 |
| D. | .8 |
| Answer» C. 4 | |
| 121. |
The quality of concrete, specifically a ____________ w/c ratio, is the best protection against sulphate attack. |
| A. | High |
| B. | Medium |
| C. | Low |
| D. | Very low |
| Answer» C. Low | |
| 122. |
The continuous strain, which the concrete undergoes due to application of external loads, is called __________ |
| A. | Workability |
| B. | Segregation |
| C. | Bleeding |
| D. | Creep |
| Answer» D. Creep | |
| 123. |
Harshness in concrete is due to the excess of _____________ |
| A. | Water |
| B. | Finer particles |
| C. | Middle sized particle |
| D. | Coarser particle |
| Answer» C. Middle sized particle | |
| 124. |
__________ has designated the concrete mixes into a number of grades as M10, M15. |
| A. | IS 456-2000 |
| B. | IS 456-2010 |
| C. | IS 513-1999 |
| D. | IS 465-2000 |
| Answer» A. IS 456-2000 | |
| 125. |
What is the approx. mix proportion for M10? |
| A. | 1:3:6 |
| B. | 1:2:4 |
| C. | 1:1.5:3 |
| D. | 1:1:2 |
| Answer» A. 1:3:6 | |
| 126. |
Quality control helps to ___________ the risks of overdesign that ___________ the overall cost. |
| A. | Maximize, Increase |
| B. | Minimize, Increase |
| C. | Maximize, Decrease |
| D. | Minimize, Decrease |
| Answer» D. Minimize, Decrease | |
| 127. |
The cement concrete, from which entrained air and excess water are removed after placing it in position, is called ________ |
| A. | Vacuum concrete |
| B. | LWC |
| C. | Prestressed concrete |
| D. | Sawdust concrete |
| Answer» A. Vacuum concrete | |
| 128. |
The light-weight concrete is prepared by ____________ |
| A. | Mixing Portland cement with sawdust in specified proportion in the concrete |
| B. | Using coke-breeze, slag as aggregate in the concrete |
| C. | Mixing Al in the concrete |
| D. | Mixing Fe in the concrete |
| Answer» B. Using coke-breeze, slag as aggregate in the concrete | |
| 129. |
Aerated Concrete is ______________ |
| A. | Very heavy weight |
| B. | Heavy weight |
| C. | Medium weight |
| D. | Light weight |
| Answer» D. Light weight | |
| 130. |
No fines concrete is manufactured by _____________ |
| A. | By adding no fines materials from normal concrete |
| B. | By eliminating no fines materials from normal concrete |
| C. | By reducing its strength |
| D. | By increasing its strength |
| Answer» B. By eliminating no fines materials from normal concrete | |
| 131. |
Density of no fines concrete with light weight aggregate vary from ________ kg/m3. |
| A. | 1600-1900 |
| B. | <300 |
| C. | >2500 |
| D. | >300 |
| Answer» B. <300 | |
| 132. |
Diameter of Round Steel Fiber lies in the range of ________ mm. |
| A. | .3-.5 |
| B. | .25-.75 |
| C. | .155-.41 |
| D. | .25-.90 |
| Answer» B. .25-.75 | |
| 133. |
Air contents should be _________ % by volume. |
| A. | 1-2 |
| B. | 2-3 |
| C. | 3-4 |
| D. | 4-5 |
| Answer» C. 3-4 | |
| 134. |
Which one is not used as air entraining agents? |
| A. | Alumina |
| B. | Natural resins |
| C. | Fats |
| D. | Oil |
| Answer» A. Alumina | |
| 135. |
What is wet process? |
| A. | Grinding and mixing of the raw materials in their dry state |
| B. | Grinding and mixing of the raw materials in their medium state |
| C. | Grinding and mixing of the raw materials in their wet state |
| D. | Grinding and mixing of the raw materials in their overheated state |
| Answer» C. Grinding and mixing of the raw materials in their wet state | |
| 136. |
Excess in lime causes _______ |
| A. | The cement to shrink and integrate |
| B. | The cement to shrink and disintegrate |
| C. | The cement to expand and integrate |
| D. | The cement to expand and disintegrate |
| Answer» D. The cement to expand and disintegrate | |
| 137. |
Silica in excess causes ________ |
| A. | The cement to set slowly |
| B. | The cement to set quickly |
| C. | The cement to expand |
| D. | The cement to disintegrate |
| Answer» A. The cement to set slowly | |
| 138. |
Alumina in excess causes _________ |
| A. | Reduces the strength of the cement |
| B. | Increases the strength of the cement |
| C. | none |
| D. | all |
| Answer» A. Reduces the strength of the cement | |
| 139. |
Which compound gives the colour to the cement? |
| A. | Lime |
| B. | Silica |
| C. | Iron Oxide |
| D. | Alumina |
| Answer» C. Iron Oxide | |
| 140. |
Which cement contains high percentage of C3S and less percentage of C2S? |
| A. | Rapid Hardening Cement |
| B. | Ordinary Portland Cement |
| C. | Quick Setting Cement |
| D. | Low Heat Cement |
| Answer» A. Rapid Hardening Cement | |
| 141. |
When concrete is to be laid under water ___________ is to used. |
| A. | Rapid Hardening Cement |
| B. | Ordinary Portland Cement |
| C. | Quick Setting Cement |
| D. | Low Heat Cement |
| Answer» C. Quick Setting Cement | |
| 142. |
Which of the following is correct for Low Heat Cement? |
| A. | Suitable for use in cold weather areas |
| B. | Heat of hydration is reduced by tri calcium aluminate content |
| C. | This cement requires longer period of curing |
| D. | This cement contains high aluminate %age usually between 35-55%. |
| Answer» B. Heat of hydration is reduced by tri calcium aluminate content | |
| 143. |
Which cement is used in sewage and water treatment plants? |
| A. | Rapid Hardening Cement |
| B. | Low Heat Cement |
| C. | Sulphate Resisting Cement |
| D. | Quick Setting Cement |
| Answer» C. Sulphate Resisting Cement | |
| 144. |
Which cement is used for mainly building construction where strength required with age? |
| A. | Rapid Hardening Cement |
| B. | Low Heat Cement |
| C. | Portland Pozzolana Cement |
| D. | Quick Setting Cement |
| Answer» C. Portland Pozzolana Cement | |
| 145. |
Which cement is used for artificial marble? |
| A. | Rapid Hardening Cement |
| B. | Sulphate Resisting Cement |
| C. | Coloured Cement |
| D. | Quick Setting Cement |
| Answer» C. Coloured Cement | |
| 146. |
Which cement is used to create bond with old concrete surface? |
| A. | Rapid Hardening Cement |
| B. | Expansive Cement |
| C. | Sulphate Resisting Cement |
| D. | Low Heat Cement |
| Answer» B. Expansive Cement | |
| 147. |
Which cement is used to store for longer duration in wet climatic conditions? |
| A. | Expansive Cement |
| B. | Ordinary Portland cement |
| C. | Hydrophobic Cement |
| D. | Quick Setting Cement |
| Answer» C. Hydrophobic Cement | |
| 148. |
Which cement is used for the construction of water-retaining structure like tanks, reservoirs, retaining walls, swimming pools, dams, bridges, piers etc? |
| A. | Waterproof Portland cement |
| B. | Colored Cement |
| C. | High Alumina Cement |
| D. | Low Heat Cement |
| Answer» A. Waterproof Portland cement | |
| 149. |
____ Cement is used for formwork that can be removed earlier and reused in other areas which save the cost of formwork. |
| A. | Rapid Hardening Cement |
| B. | Colored Cement |
| C. | High Alumina Cement |
| D. | Low Heat Cement |
| Answer» A. Rapid Hardening Cement | |
| 150. |
Which cement is mainly used for interior and exterior decorative works? |
| A. | Rapid Hardening Cement |
| B. | Colored Cement |
| C. | High Alumina Cement |
| D. | Low Heat Cement |
| Answer» B. Colored Cement | |
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