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Select the correct answer regarding motives for holding inventories by firms.
1. Transaction motive
2. Environmental motive
3. Precautionary motive
4. Speculative motive
5. Competitive motive
In an opencast mine shown in the figure below, the coal has a density of 1.4 t/m3. Assuming mining operation started from plane XY, the operating stripping ratio under the given conditions in m3/t is
Introduction to Mining Engineering mcq question image
The question given below consists of a statement, followed by three arguments numbered I, II and III. You have to decide which of the arguments is/are ‘strong’ arguments and which is/are ‘weak’ arguments and accordingly choose your answer from the alternatives given below each question. Statement: In the wake of globalization and digitization of the manner in which the business are conducted, the IT/ITES industry holds a significant place in the future business scenario. The Economic Survey 2017-18 mentioned that the IT/ITES services industry in India has scaled to around $140 billion during 2016-17. India today is globally the top outsourcing destination accounting for more than half of the market share. The IT/ITES industry has contributed around 7.7% of the country's GDP and according to IBEF is a key employment generator with a projection of creating 1.3-1.5 lakh new jobs annually. Which among the following arguments support the above statement in the best possible manner? Arguments: I. The Government has also provided considerable inputs to the industry with its various flagship programmes such as Digital India, Smart Cities, e-Governance coupled with a drive towards a cashless economy. II. The Government has been pro-active in considering demands of the industry and providing timely respite from the teething troubles under GST as well.  III. The IT/ITES industry is a labour intensive industry and a large scale employment generator. It is a common practice across the industry to provide various privileges and facilities to their staff in order to boost employee retention rates in their organisation.
The Mineral Laws (Amendment) Bill, 2020 has recently been passed. Consider the following regarding the same: 1. With the introduction of this Bill, companies which do not have any prior coal mining experience in India can also participate in the auction of coal blocks. 2. Private companies will now be able to undertake coal mining for commercial mining purposes, thereby ending the captive end-use criteria. 3. A composite license namely Prospecting License-Cum-Mining Lease has been introduced in the Bill. 4. The revenue-sharing model detailed in the Bill is based on recommendations of an expert committee headed by Injeti Srinivas. Which of the above are true? 
The following characteristic curves (P, Q, R, S) pertain to rotary drilling in rock.
Mining Machinery mcq question image
Title of the curve
I : Torque versus RPM
II: Rate of penetration versus uniaxial compressive strength of rock
III : Rate of penetration versus weight on bit
IV : Specific energy versus weight on bit
Match the curves with their titles
A flat coal seam of thickness (t) 3m is excavated and broken roof rock has completely filled the space created due to extraction as shown in the figure. If the bulking factor of roof rock is 1.2. the caving height (H) in m is
Introduction to Mining Engineering mcq question image
A vertical ore body having a consistent width of 100 m has been excavated by the open pit method up to a depth of 100 m at a pit slope angle of 45°. The figure shows the cross section of the open pit. If the ore body is further excavated by a depth of 10 m, maintaining the same pit slope angle, the ratio of waste rock to ore is
Introduction to Mining Engineering mcq question image
Figure shows a two pulley system for hoisting a load of 10 kN. The coefficient of friction between each pulley and the rope is 0.2. The vertical and horizontal distances between the centers of the pulleys are 25m and 16m respectively. The tensions T1 and T2 respectively in kN are
Mining Machinery mcq question image
A two tonne mine car is released from the top of an incline at a height of 3m as shown in the figure. The mine car travels 45m along the inclined track and another 85m along the horizontal track before coming to rest. The specific rolling resistance of the, car in N/tonne is
Mining Machinery mcq question image
Bleaching liquors are inorganic pollutants produced mainly by which Industry/Industries? I. Paper and Pulp Industry II. Iron and Steel Industry III. Mining Industry