MCQOPTIONS
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MCQOPTIONS
This section includes 99 Mcqs, each offering curated multiple-choice questions to sharpen your Graduate Aptitude Test (GATE) knowledge and support exam preparation. Choose a topic below to get started.
| 51. |
Mahatama Gandhi was known for his humility as |
| A. | he played an important role in humiliating exit of British from India. |
| B. | he worked for humanitarian causes. |
| C. | he displayed modesty in his interactions. |
| D. | he was a fine human being. |
| Answer» D. he was a fine human being. | |
| 52. |
The Headmaster ___________ to speak to you. Which of the following options is incorrect to complete the above sentence? |
| A. | is wanting |
| B. | wants |
| C. | want |
| D. | was wanting |
| Answer» D. was wanting | |
| 53. |
If 3 ≤ X ≤ 5 and 8 ≤ Y ≤ 11 then which of the following options is TRUE? |
| A. | 3/5 ≤ X/Y ≤ 8/5 |
| B. | 3/11 ≤ X/Y ≤ 5/8 |
| C. | 3/11 ≤ X/Y ≤ 8/5 |
| D. | 3/5 ≤ X/Y ≤ 8/11 |
| Answer» C. 3/11 ≤ X/Y ≤ 8/5 | |
| 54. |
The uniaxial compressive strength of a limestone sample is 80 MPa. The sample is confined at a pressure of 20 MPa in a triaxial compressive strength test. Based on Hoek-Brown failure criteria the maximum principal stress at failure in MPa is (consider rock constants as m = 7.88, s = 1.0 and a = 0.5) |
| A. | 117.9 |
| B. | 132.3 |
| C. | 137.9 |
| D. | 157.9 |
| Answer» E. | |
| 55. |
A cylindrical rock specimen of diameter 54 mm has Young’s modulus of 68.97 GPa and Poisson’s ratio of 0.35. The rock specimen fails in uniaxial compression at a lateral strain of 0.01%. The axial load at failure in kN is __________ |
| A. | 34.6 to 35.3 |
| B. | 44.8 to 45.5 |
| C. | 54.7 to 55.3 |
| D. | 12.6 to 13.3 |
| Answer» C. 54.7 to 55.3 | |
| 56. |
For a shrinkage stope the following data values are given Insitu tonnage 9000 tonne Insitu grade 5.2 g/tonne Average grade of waste 1.4 g/tonne Loss of ore in the stope 10% Dilution 20% The grade at the mill-head in g/tonne is ________ |
| A. | 4.5 to 4.518 |
| B. | 4.2 to 4.215 |
| C. | 6.3 to 6.344 |
| D. | 1.3 to 1.367 |
| Answer» B. 4.2 to 4.215 | |
| 57. |
In an experiment to study coal dust explosibility, it is found that at least 3.0 g of limestone dust should be added to a sample of 2.0 g of coal dust to ensure that propagation of flame does not take place. The explosibility factor of coal dust is |
| A. | 60.00 |
| B. | 20.00 |
| C. | 6.70 |
| D. | 1.50 |
| Answer» E. | |
| 58. |
Two meshing spur gear wheels of Module 6 have 24 and 42 teeth. The distance in mm between the centres of the gear wheels is |
| A. | 1000 |
| B. | 198 |
| C. | 126 |
| D. | 72 |
| Answer» C. 126 | |
| 59. |
In a belt conveyor system, function of the snub pulley is to |
| A. | clean the inner surface of the belt |
| B. | clean the outer surface of the belt |
| C. | increase the angle of contact of belt with drive drum |
| D. | decrease the belt tension |
| Answer» D. decrease the belt tension | |
| 60. |
Under standard temperature and pressure conditions the theoretical maximum height in m to which water can be lifted using an air-lift pump is |
| A. | 10.33 |
| B. | 9.61 |
| C. | 7.45 |
| D. | 6.05 |
| Answer» B. 9.61 | |
| 61. |
The number of ways in which the letters in the word MINING can be arranged is |
| A. | 90 |
| B. | 180 |
| C. | 360 |
| D. | 720 |
| Answer» C. 360 | |
| 62. |
An emulsion explosive of specific gravity 1.25 is used for blasting in an iron ore formation having P-wave velocity of 3000 m/s and specific gravity of 3.20. For an explosive impedance to rock impedance ratio of 0.5, the desired velocity of detonation of the explosive in m/s is |
| A. | 3840 |
| B. | 4000 |
| C. | 4200 |
| D. | 7680 |
| Answer» B. 4000 | |
| 63. |
Identify the correct statement for a ‘normal distribution’. |
| A. | Mean is greater than mode but less than median |
| B. | Mean is less than mode but greater than median |
| C. | Mean is greater than mode and median |
| D. | Mean, median and mode are equal |
| Answer» E. | |
| 64. |
Among the following options, the specific energy for rock-drilling is lowest in |
| A. | rotary diamond drilling |
| B. | rotary roller drilling |
| C. | percussive drilling |
| D. | jet piercing |
| Answer» D. jet piercing | |
| 65. |
Events A and B are independent but NOT mutually exclusive. If the probabilities P(A) and P(B) are 0.5 and 0.4 respectively, then P(A ∪ B) is |
| A. | 0.6 |
| B. | 0.7 |
| C. | 0.8 |
| D. | 0.9 |
| Answer» C. 0.8 | |
| 66. |
The pressure on a phreatic surface is |
| A. | less than atmospheric pressure |
| B. | greater than atmospheric pressure |
| C. | equal to atmospheric pressure |
| D. | independent of atmospheric pressure |
| Answer» D. independent of atmospheric pressure | |
| 67. |
Incubation period is NOT related to |
| A. | crossing point temperature of coal |
| B. | panel size |
| C. | seam thickness |
| D. | explosibility of coal dust |
| Answer» E. | |
| 68. |
Transit theodolite is a |
| A. | micro-optic theodolite |
| B. | theodolite with face left and face right reading facilities |
| C. | theodolite with stadia hairs |
| D. | theodolite with two vertical circles |
| Answer» C. theodolite with stadia hairs | |
| 69. |
Rill stoping method is a form of |
| A. | block caving |
| B. | artificially supported stoping |
| C. | underhand stoping |
| D. | overhand stoping |
| Answer» E. | |
| 70. |
Long-hole drilling with crater blasting is used for the construction of |
| A. | winze |
| B. | shaft |
| C. | raise |
| D. | decline |
| Answer» D. decline | |
| 71. |
For a 25 mm diameter spherical charge, the maximum allowable charge length in cm is |
| A. | 15.0 |
| B. | 25.0 |
| C. | 30.0 |
| D. | 150.0 |
| Answer» B. 25.0 | |
| 72. |
In the Moh’s scale of hardness, the minerals in increasing sequence of hardness are |
| A. | calcite, gypsum, topaz, diamond |
| B. | topaz, gypsum, calcite, diamond |
| C. | calcite, gypsum, diamond, topaz |
| D. | gypsum, calcite, topaz, diamond |
| Answer» E. | |
| 73. |
If the transpose of a matrix is equal to its inverse, then the matrix is |
| A. | symmetric |
| B. | orthogonal |
| C. | skew symmetric |
| D. | singular |
| Answer» C. skew symmetric | |
| 74. |
In the Coward flammability diagram, the respective percentages of methane and oxygen at the nose limit are |
| A. | 14.2, 0.0 |
| B. | 14.1, 18.2 |
| C. | 5.8, 12.1 |
| D. | 5.0, 19.2 |
| Answer» D. 5.0, 19.2 | |
| 75. |
The size of the Theodolite is defined according to the: |
| A. | Diameter of graduated horizontal circle. |
| B. | Length of the telescope. |
| C. | Height of the standard. |
| D. | All the above are correct. |
| Answer» B. Length of the telescope. | |
| 76. |
The ore reserves for which tonnage and grade are computed party from specific Measurements and partly from projection for a reasonable distance on geologic evidence is Known as: |
| A. | Proved or measured ore reserves |
| B. | Probable or indicated ore reserves. |
| C. | Possible or inferred ore reserves. |
| D. | Actual ore reserves. |
| Answer» E. | |
| 77. |
“Minimum stopping width" is the: |
| A. | Average width of the ore body |
| B. | Minimum width of the ore body. |
| C. | Minimum distance between two ore body. |
| D. | Minimum width required for mining. |
| Answer» E. | |
| 78. |
The purpose of the bulk sampling of the coal is: |
| A. | To study the wash ability |
| B. | To study the carbon content. |
| C. | To study the method of formation |
| D. | For grading purpose. |
| Answer» B. To study the carbon content. | |
| 79. |
Coning and quartering is: |
| A. | A mining method employed in unconsolidated ground. |
| B. | A mining method employed for the diamond mining. |
| C. | A method employed for obtaining a laboratory sample from the field sample. |
| D. | A cutting and filling method employed in underground mining. |
| Answer» D. A cutting and filling method employed in underground mining. | |
| 80. |
When the material collected to represent a rock type, or a formation or an ore body in the quantitative sense then it is termed as: |
| A. | Specimen. |
| B. | Sample. |
| C. | Both specimen and sample can be used. |
| D. | Quantitative specimen. |
| Answer» C. Both specimen and sample can be used. | |
| 81. |
Drift mining is generally employed: |
| A. | For the underground mining. |
| B. | For coal mining. |
| C. | ln the exploitation of placers. |
| D. | In the exploitation of copper ore. |
| Answer» D. In the exploitation of copper ore. | |
| 82. |
Horizon mining for coal winning is more suitable where: |
| A. | The coal seams are horizontal. |
| B. | The coal seams are highly disturbed. |
| C. | The coal seams are slightly dipping. |
| D. | The coal seams are found above the earth’s surface. |
| Answer» E. | |
| 83. |
The mining methods adopted in Rakha copper mine: |
| A. | Cut and fill method |
| B. | Room and pillar method |
| C. | Post and pillar method. |
| D. | All the above. |
| Answer» E. | |
| 84. |
Long wall method is: |
| A. | Generally applicable to thin coal seams. |
| B. | Applied to deep mining. |
| C. | Applicable to thick coal seams |
| D. | Applied to very deep mining and thick coal seams. |
| Answer» B. Applied to deep mining. | |
| 85. |
The width of the ore body which can be economically mined is: |
| A. | Stopping width. |
| B. | Assay width. |
| C. | Actual width. |
| D. | Grady width. |
| Answer» B. Assay width. | |
| 86. |
Long wall method is generally employed for: |
| A. | Copper ore mining. |
| B. | lron ore mining. |
| C. | Coal mining |
| D. | Gypsum mining. |
| Answer» D. Gypsum mining. | |
| 87. |
Choose the most suitable answer for Gathering: |
| A. | lt is a opencast mining method. |
| B. | lt is a underground mining method. |
| C. | lt is a mining method, which is used for coal winning. |
| D. | lt is a underground mining method used for small rich ore bodies. |
| Answer» E. | |
| 88. |
Strip mining is a method of: |
| A. | Underground mining. |
| B. | Opencast mining with a high degree of mechanization. |
| C. | Horizon mining. |
| D. | Long wall mining. |
| Answer» C. Horizon mining. | |
| 89. |
Minimum metal percentage, at which mining is profitable, is known as |
| A. | Average grade |
| B. | Cut off grade. |
| C. | Mill grade. |
| D. | Economical grade. |
| Answer» C. Mill grade. | |
| 90. |
The openings in the mini, which serve as a means of entry is known as: |
| A. | Shafts. |
| B. | Edits |
| C. | Cross cut. |
| D. | Stop. |
| Answer» B. Edits | |
| 91. |
Snake holes are: |
| A. | Vertically drilled holes |
| B. | More of less horizontally drilled holes at the foot of a high bench. |
| C. | Inclined drilling holes. |
| D. | Vertically drilled holes with two lateral openings. |
| Answer» C. Inclined drilling holes. | |
| 92. |
The mining terminology, exploitation or winning is: |
| A. | The process of blasting |
| B. | The process of extracting the ore or economic mineral from the earth. |
| C. | The process of ventilation. |
| D. | The detailed mapping of the ore body. |
| Answer» C. The process of ventilation. | |
| 93. |
Blasting gelatin is made up of: |
| A. | Nitroglycerine and ammonium nitrate |
| B. | Nitroglycerine and sodium nitrate. |
| C. | Nitroglycerine and guncotton |
| D. | Nitroglycerine only. |
| Answer» D. Nitroglycerine only. | |
| 94. |
The drill holes which are driven vertically and make the sides of the excavation are Described as: |
| A. | Easers. |
| B. | Simpers. |
| C. | Dressers. |
| D. | Hole directors. |
| Answer» D. Hole directors. | |
| 95. |
High explosives containing: |
| A. | Nitroglycerine. |
| B. | Sodium nitrate |
| C. | Ammonium nitrate. |
| D. | Charcoal sulphur |
| Answer» B. Sodium nitrate | |
| 96. |
"Salting" of an ore is done: |
| A. | By adding common salts. |
| B. | By removing salt form the ore. |
| C. | By mixing substances for increasing the values in the ore sample. |
| D. | By mixing substances for lowering the values in the ore samples. |
| Answer» B. By removing salt form the ore. | |
| 97. |
The grade which is available from a property after actual mining is: |
| A. | Computed grade |
| B. | Effective grade. |
| C. | Run - of - mine grade |
| D. | Pit head grade. |
| Answer» C. Run - of - mine grade | |
| 98. |
The spacing of the trenches pits and boreholes depend on: |
| A. | The length of the ore body |
| B. | The modes of occurrence of the deposits. |
| C. | The depth of the deposits. |
| D. | The outcrops of the deposits. |
| Answer» C. The depth of the deposits. | |
| 99. |
Grab sampling consists in: |
| A. | Picking pieces of ore at one place only |
| B. | Picking pieces of ore at random to make up a sample |
| C. | Picking pieces of coal only. |
| D. | Picking pieces of ore in a grid fashion. |
| Answer» C. Picking pieces of coal only. | |