Mining Engineering MCQ
Test your knowledge with important Mining Engineering MCQ and their applications. These MCQs are beneficial for competitive exams too. Explore 30+ more Mining Engineering MCQs on Bissoy. Bissoy App
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The main fan operating point of a ventilation system is shown in the figure below. If an NPV of 200 Pa assists the ventilation system, the resultant pressure (Pa) and quantity (m<sup>3</sup>) generated by the<br><img src="/images/question-image/mining-engineering/mine-ventilation/1682429211-M2-3-73-95.PNG" title="Mine Ventilation mcq question image" alt="Mine Ventilation mcq question image">
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Air of 20.8% O<sub>2</sub>, concentration enters a coal mine panel at 20 m<sup>3</sup>/s and exits with 20.6% O<sub>2</sub>. The oxygen depletion is due to oxidation of carbon in spontaneous heating process only, assuming the density of oxygen as 1.3 kg/m<sup>3</sup> and the calorific value of carbon as 34 MJ/kg, the heat generated in kW from the panel due to spontaneous oxidation is
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Mean air temperature of a 450 m deep downcast shaft is 29°C and that of the upcast shaft is 37°C. The height of the motive column in m is
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Geothermic gradient is
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Air at a density of 1.2 kg/m<sup>3</sup> flows in a straight duct such that the velocity at the centre is 12.5 m/s. the method factor for the velocity profile is known to be 0.80. The air flow encounters a symmetric expansion such that the cross- sectional are of the duct becomes double. The static pressure value at the inlet and outlet of the expansion are 60 Pa and 90 Pa respectively. Neglecting friction the shock pressure loss on account of expansion in Pa is
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In a mine between upcast shaft and downcast shaft, two airways are connected in parallel and their resistances are 100 and 120 Ns<sup>-2</sup>m<sup>-8</sup> respectively. The resistance of upcast shaft, downcast shaft and the fan drifts are 10, 20, and 5 Ns<sup>-2</sup>m<sup>-8</sup> respectively. The fan drift air pressure is 15 MN/m<sup>2</sup>. The rate of airflow through the mine in m<sup>3</sup>
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True bearing of a line is its angular denation from a rnetidian measured in . . . . . . . .
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The triangular error method is employed to solve.
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A chord between two successive regular pegs on the curve called as . . . . . . . .
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In which method the intercepts on the levelling staff is kept constant and distance between stadia hairs are variable.
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It is the operation of bringing the telescope from the face left condition to face right condition and vice-versa called . . . . . . . .
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A line joining points of equal declination at a given time termed as . . . . . . . .
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The length of the curve calculated by formule.
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Line ranger consists of two . . . . . . . .
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Prism square is an instrument used to . . . . . . . .
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Surveying is essentially a process of determining the relative positions of points in . . . . . . . .
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When a chain is too long, the measured length will be . . . . . . . . than its true length.
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The horizontal angle between the true meridian and line is called . . . . . . . .
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A curve whose radious varies gradually from infinity to finite value equal to the radious of circular curve to be connected called as . . . . . . . .
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The errors arising due to eccentricity of the verniers and centre is eiiminated by . . . . . . . . method.
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For two survey points the coordinates are given. The line CD has length and bearing<br>
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Pentagraph is used for . . . . . . . .
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The back bearing of a line is 22°, its fore bearing is . . . . . . . .
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For the construction of high way (or) rail way, the required are
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The arrow isused to mark
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Tangent length calculated by the formule.
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The unit of linear meesurernent in survey work is . . . . . . . .
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With usual notations the correction for pull C<sub>p</sub>, is euqal to . . . . . . . .
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To locate a straight object such as well, there must be a minimum of . . . . . . . .
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If the magnetic bearing of the sun at noon is 350° 20<sup>1</sup>, the magnetic declination at the place is equal to . . . . . . . .