JNTU
JNTU B.Tech III MINE MECHANIZATION - II Previous Question Paper (January/February - 2023 - R18)
Note: i) Question paper consists of Part A, Part B. ii) Part A is compulsory, which carries 25 marks. In Part A, Answer all questions. iii) In Part B, Answer any one question from each unit. Each question carries 10 marks and may have a, b as sub questions.
Part A
What is Koepe winding?
Answer
Koepe winding, also known as friction winding, is a system where the winding rope passes over a friction pulley (Koepe wheel) instead of being coiled on a drum. The drive is provided by the friction between the rope and the pulley lining, and it typically uses a balance rope to compensate for the weight of the winding ropes.
What are the applications of drum Winder?
Answer
Drum winders are primarily used for:
- Winding from multiple levels in a shaft.
- Sinking operations where flexibility in rope length is required.
- Applications where the shaft depth is relatively shallow to moderate.
- Situations requiring independent control of two cages or skips.
What are depth indicator?
Answer
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Describe the working of over wind preventers.
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What can SDL be used for?
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What is the function of plough?
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What is the function of power loader?
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What are the functions of pumps?
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What are the applications of dumpers?
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What are the applications of dragline?
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Part B
Explain the following terms:
Rope guides
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shaft sinking
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bells
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Draw the layout of pit top and pit bottom and discuss their features.
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Explain construction of any two types of Winding Drum.
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Explain Mechanical and electrical braking systems with neat sketches.
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Explain the construction and operation of coal drill.
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What are the factors affecting length of longwall face?
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Explain the hydraulic layouts of longwall focus.
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Explain the operation and applications of Shuttle cars.
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Explain the construction and operation of any two types of pumps.
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Explain the distribution of electrical power in mines.
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Explain the construction and operation of Bucket Wheel Excavator.
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