MCQOPTIONS
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MCQOPTIONS
This section includes 104 Mcqs, each offering curated multiple-choice questions to sharpen your Highway Engineering knowledge and support exam preparation. Choose a topic below to get started.
| 51. |
Efflorescence is due to the presence of |
| A. | excessive soluble salts in the mortar |
| B. | rust in the reinforcing steel |
| C. | cracks in the masonry |
| D. | stagnating water |
| Answer» B. rust in the reinforcing steel | |
| 52. |
In fineness test of Rapid Hardening Portland Cement (RHPC) the residue on IS sieve No. 9 should not be more than |
| A. | 1.0% |
| B. | 5% |
| C. | 10% |
| D. | 15% |
| Answer» C. 10% | |
| 53. |
If P is the percentage of water required for normal consistency, water to be added for determination of initial setting time is _________. |
| A. | 0.70 P |
| B. | 0.75 P |
| C. | 0.80 P |
| D. | 0.85 P |
| Answer» E. | |
| 54. |
Le Chatelier’s device is used for determining the |
| A. | Setting time of cement |
| B. | Soundness of cement |
| C. | Tensile strength of cement |
| D. | Compressive strength of cement |
| Answer» C. Tensile strength of cement | |
| 55. |
If a sack of cement requires 30 liters of water, what will be the water-cement ratio? |
| A. | 0.5 |
| B. | 0.4 |
| C. | 0.6 |
| D. | 0.3 |
| Answer» D. 0.3 | |
| 56. |
Initial setting time is maximum for |
| A. | Portland-Pozzolana cement |
| B. | Portland-slag cement |
| C. | Low heat Portland-pozzolana cement |
| D. | High strength Portland cement |
| Answer» D. High strength Portland cement | |
| 57. |
Addition of pozzolana to ordinary Portland cement causes |
| A. | decrease in early strength |
| B. | reduction in chemical action with sulphates |
| C. | increase in shrinkage |
| D. | All option are correct |
| Answer» E. | |
| 58. |
Flash set of ordinary Portland cement paste is ______. |
| A. | Premature hardening |
| B. | Surface hardening only |
| C. | Hardening without development of heat of hydration |
| D. | All the options are correct |
| Answer» B. Surface hardening only | |
| 59. |
Considering 100g of cement for hydration and taking specific gravity of cement as 3.15 the absolute volume of unhydrated cement is : |
| A. | 315ml |
| B. | 31.8ml |
| C. | 100ml |
| D. | 103.15ml |
| Answer» C. 100ml | |
| 60. |
Gypsum is typically added in cement to |
| A. | increase workability |
| B. | enhance hardening |
| C. | increase heat of hydration |
| D. | prevent quick setting |
| Answer» E. | |
| 61. |
Consider the following statements regarding the 'strength of cement':1. Strength test on cement is made on cubes of the cement-sand mix.2. Water to be used for the paste is 0.2P, where P is the water needed for normal consistency.3. The normal consistency is determined on Le Chatelier's apparatus.4. Cubes are cast in three layers in leak-proof moulds further compacted in each layer by vibration on a machine.Which of the above statements are correct? |
| A. | 1 and 2 |
| B. | 2 and 3 |
| C. | 1 and 4 |
| D. | 3 and 4 |
| Answer» D. 3 and 4 | |
| 62. |
In Ordinary Portland cement the percentage of lime constitutes: |
| A. | 60 to 67 |
| B. | 50 to 57 |
| C. | 74 to 78 |
| D. | 51 to 56 |
| Answer» B. 50 to 57 | |
| 63. |
Pick an incorrect option:Tricalcium aluminate (C3A) |
| A. | reacts fast with water |
| B. | generates less heat of hydration |
| C. | causes initial setting and early strength of cement |
| D. | does not contribute to develop ultimate strength |
| Answer» C. causes initial setting and early strength of cement | |
| 64. |
For quality control of Portland cement, the test essentially is done is |
| A. | setting time |
| B. | soundness |
| C. | tensile strength |
| D. | All options are correct |
| Answer» E. | |
| 65. |
How much water is added in cement mortar to determine compressive strength of cement? |
| A. | Equal to \(\left(\frac P 4 + 3\right)\) percent of total mass of cement and sand, where P is water required for standard consistency |
| B. | Equal to 0.85 P percent of total mass of cement and sand, where P is water required for standard consistency |
| C. | 0.28 times the mass of cement mortar |
| D. | 0.4 times the mass of cement |
| Answer» B. Equal to 0.85 P percent of total mass of cement and sand, where P is water required for standard consistency | |
| 66. |
A cement bag stored for two years is likely to result in |
| A. | Change in the colour of cement |
| B. | Increase in the strength of cement |
| C. | Loss of strength of cement |
| D. | Increase in fineness of cement |
| Answer» D. Increase in fineness of cement | |
| 67. |
Before testing setting time of cement, what should one test for? |
| A. | Consistency |
| B. | Fineness |
| C. | Strength |
| D. | Soundness |
| Answer» B. Fineness | |
| 68. |
Early attainment of strength in rapid hardening cement is mainly due to: |
| A. | Tricalcium silicate |
| B. | Tri-calcium aluminate |
| C. | Finer grinding |
| D. | Gypsum |
| Answer» D. Gypsum | |
| 69. |
In Bouge compounds, the main characteristics role of C2S is: |
| A. | high heat of hydration |
| B. | low heat of hydration |
| C. | initial setting of cement |
| D. | final setting of cement |
| E. | early strength development |
| Answer» C. initial setting of cement | |
| 70. |
Match the apparatus for conduct of test in List 1 with the property of cement in List 2.List 1List 2A. Vicat’s apparatus test1. Soundness testB. Le-Chatelier’s apparatus2. FinenessC. Briquette test method3. Setting timeD. Air permeability method4. Tensile strength |
| A. | A – 3, B – 1, C – 4, D - 2 |
| B. | A – 3, B – 4, C – 2, D - 1 |
| C. | A – 4, B – 3, C – 1, D - 2 |
| D. | A – 4, B – 1, C – 3, D - 2 |
| Answer» B. A – 3, B – 4, C – 2, D - 1 | |
| 71. |
Excess silica in cement |
| A. | increases the setting time |
| B. | decreases the setting time |
| C. | weakens the strength of the cement |
| D. | does not affect the setting time |
| Answer» B. decreases the setting time | |
| 72. |
If the effective plan area of a warehouse is 54 sq. m, and maximum height of piles permitted is 270 cm, then what is the number of cement bags that can be stored? |
| A. | 200 |
| B. | 2000 |
| C. | 24000 |
| D. | 2700 |
| Answer» E. | |
| 73. |
A very small amount of ______ is useful in making sound cement. If it is in excess, it causes the cement to become unsound. |
| A. | iron oxide |
| B. | silica |
| C. | sulphur |
| D. | alkali |
| Answer» D. alkali | |
| 74. |
Gypsum is added to Portland cement during its manufacturing so that it may |
| A. | Accelerate the setting time |
| B. | Retard the setting time |
| C. | Decrease the burning temperature |
| D. | Facilitate grinding |
| Answer» C. Decrease the burning temperature | |
| 75. |
Consider the following statements regarding 'setting of cement':1. Low-heat cement sets faster than OPC.2. Final setting time decides the strength of cement.3. Initial setting time of Portland PozzoIlona is 30 minutes.4. Air-induced setting is observed when stored under damp conditions.5. Addition of gypsum retards the setting time.Which of the above statements are correct? |
| A. | 1, 2 and 3 |
| B. | 2, 3 and 4 |
| C. | 3, 4 and 5 |
| D. | 2, 3 and 5 |
| Answer» D. 2, 3 and 5 | |
| 76. |
Efflorescence in cement is caused due to the excess of |
| A. | Silica |
| B. | Lime |
| C. | Iron oxide |
| D. | Alkalies |
| Answer» E. | |
| 77. |
Consider the following forms of water in a hydrated cement paste:1. Capillary water2. Chemically combined water3. Interlayer water4. Adsorbed waterWhich of the above forms of water will on its/their removal, cause shrinkage of the paste? |
| A. | 1, 2 and 3 |
| B. | 1, 2 and 4 |
| C. | 2, 3 and 4 |
| D. | 1, 3 and 4 |
| Answer» E. | |
| 78. |
Addition of pozzolana to ordinary portland cement increase |
| A. | Bleeding |
| B. | Shrinkage |
| C. | Permeability |
| D. | Heat of hydration |
| Answer» C. Permeability | |
| 79. |
For a 43 grade cement conforming to IS 8112 (2013), the maximum allowed compressive strength at 28-days is |
| A. | 58 MPa |
| B. | 43 MPa |
| C. | 53 MPa |
| D. | 33 MPa |
| E. | 63 MPa |
| Answer» B. 43 MPa | |
| 80. |
Identify the correct statements.i. Expanding cement is used for filling the cracksii. White cement is mostly used for decorative worksiii. Portland pozzolana cement produces less heat of hydrationiv. High strength Portland cement is produced from the special materials |
| A. | i, ii and iii only |
| B. | i, ii and iv only |
| C. | ii, iii and iv only |
| D. | i, ii, iii and iv |
| Answer» E. | |
| 81. |
An ordinary Portland cement when tested for its fineness, should not leave any residue on I.S. Sieve No.9, more than _____. |
| A. | 5% |
| B. | 10% |
| C. | 15% |
| D. | 20% |
| Answer» C. 15% | |
| 82. |
Hydration of which compound is responsible for increase in strength of cement in later stage? |
| A. | Tri-calcium aluminate (C3A) |
| B. | Tetra-calcium Aluminoferrite (C4AF) |
| C. | Tri-calcium Silicate (C3S) |
| D. | Di-calcium silicate (C2S) |
| Answer» E. | |
| 83. |
Consider the following statements:1. Rise in temperature does not cause any change in the colour of cement concrete.2. Curing minimizes the shrinkage of cement concrete when it setsWhich of these statement is / are correct? |
| A. | 1 only |
| B. | 2 only |
| C. | Both 1 and 2 |
| D. | Neither 1 nor 2 |
| Answer» D. Neither 1 nor 2 | |
| 84. |
Identify the correct statements. |
| A. | White cement is unsuitable for ordinary work. |
| B. | Pozzolana cement is grey in colour |
| C. | C3S is tricalcium silicate |
| D. | Strength of cement should not be disturbed until it is to be used |
| Answer» D. Strength of cement should not be disturbed until it is to be used | |
| 85. |
Consider the following data for concrete with mild exposure:Water-cement ratio = 0.50Water = 191.6 litreThe required cement content will be |
| A. | 561 kg/m3 |
| B. | 472 kg/m3 |
| C. | 383 kg/m3 |
| D. | 294 kg/m3 |
| Answer» D. 294 kg/m3 | |
| 86. |
For under-water construction ______ cement is used. |
| A. | Portland pozzolona |
| B. | Ordinary portland |
| C. | Expansive |
| D. | Quick setting |
| Answer» E. | |
| 87. |
According to Power's formula the theoretical compressive strength of sample of concrete with gel space ratio 0.59 is |
| A. | 97.24 MPa |
| B. | 49.29 MPa |
| C. | 57.2 MPa |
| D. | 78.84 MPa |
| Answer» C. 57.2 MPa | |
| 88. |
For getting Green colored cement, which pigment has to be added during the grinding of the cement clinkers? |
| A. | Barium manganite |
| B. | Chromium oxide |
| C. | Oxides of Iron |
| D. | Oxides of Cobalt |
| Answer» C. Oxides of Iron | |
| 89. |
Air permeability method is used to determine |
| A. | Soundness of cement |
| B. | Setting time |
| C. | Fineness of cement |
| D. | Resistance of cement |
| Answer» D. Resistance of cement | |
| 90. |
THE_INITIAL_SETTING_TIME_OF_CEMENT_IS_NOT_LESS_THAN?$ |
| A. | 30 seconds |
| B. | 300 seconds |
| C. | 30 minutes |
| D. | 300 minutes |
| Answer» D. 300 minutes | |
| 91. |
The volume of water in setting time test is$ |
| A. | 0.78p |
| B. | 0.75p |
| C. | 0.85p |
| D. | 0.95p |
| Answer» D. 0.95p | |
| 92. |
The_first_test_to_be_done_for_determining_any_property_of_cement_is$ |
| A. | Consistency |
| B. | Setting time |
| C. | Soundness |
| D. | Fineness |
| Answer» B. Setting time | |
| 93. |
The total grades of cement specified by IRC is |
| A. | 3 |
| B. | 6 |
| C. | 9 |
| D. | 12 |
| Answer» D. 12 | |
| 94. |
The most commonly used grade of cement is |
| A. | 33 |
| B. | 43 |
| C. | 53 |
| D. | 63 |
| Answer» D. 63 | |
| 95. |
The property of cement by which it doesn’t expand is called$ |
| A. | Fineness |
| B. | Soundness |
| C. | Setting time |
| D. | Consistency |
| Answer» C. Setting time | |
| 96. |
The volume of water in soundness test is |
| A. | 0.6p |
| B. | 0.7p |
| C. | 0.78p |
| D. | 0.8p |
| Answer» D. 0.8p | |
| 97. |
The density of cement in Kg/m3 i? |
| A. | 1440 |
| B. | 1240 |
| C. | 1340 |
| D. | 1540 |
| Answer» B. 1240 | |
| 98. |
One meter cube of cement consists of how many bags of cement? |
| A. | 30 |
| B. | 50 |
| C. | 15 |
| D. | 10 |
| Answer» B. 50 | |
| 99. |
The specific gravity of cement is |
| A. | 2.5 |
| B. | 1.44 |
| C. | 3.15 |
| D. | 30 |
| Answer» E. | |
| 100. |
Cement specific gravity is measured by |
| A. | Water |
| B. | Kerosene |
| C. | Oil |
| D. | Petrol |
| Answer» C. Oil | |