JAWAHARLAL NEHRU TECHNOLOGICAL UNIVERSITY HYDERABAD
JAWAHARLAL NEHRU TECHNOLOGICAL UNIVERSITY HYDERABAD B.Tech III MINE MECHANIZATION - II Previous Question Paper (November/December - 2018 - R16)
Part A is compulsory which carries 25 marks. Answer all questions in Part A. Part B consists of 5 Units. Answer any one full question from each unit. Each question carries 10 marks.
Part A
What is head gear?
Answer
Head gear is a robust steel or concrete structure erected over the top of a mine shaft. It supports the winding sheaves (pulleys) and carries the weight of the winding ropes, cages, and the load being hoisted.
What is the purpose of keps? Where it is located?
Answer
Keps are mechanical supports used to hold the cage steady at the landing level during loading and unloading operations, preventing it from moving due to rope stretch or slack. They are located at the pit top and pit bottom landing stations.
What is purpose of depth indicator?
Answer
Sign in to view the complete answer paper.
Name the various safety devices commonly used in shaft winding.
Answer
Sign in to view the complete answer paper.
What is coal plough?
Answer
Sign in to view the complete answer paper.
Name the factors which influence the performance of a shearer?
Answer
Sign in to view the complete answer paper.
What is a mechanical loader? Is it used as a transporting machine?
Answer
Sign in to view the complete answer paper.
Write any three differences between centrifugal pump and reciprocating?
Answer
Sign in to view the complete answer paper.
What is a ripper?
Answer
Sign in to view the complete answer paper.
What are the factors influence the performance of a dragline?
Answer
Sign in to view the complete answer paper.
Part B
Guide used in mine shaft
Answer
Sign in to view the complete answer paper.
Safety catches
Answer
Sign in to view the complete answer paper.
Explain, with a line diagram, the constructional features and operation of a drum winder. What are its advantages and limitations.
Answer
Sign in to view the complete answer paper.
Explain in detail, the over speed preventing and slow braking device used in winding.
Answer
Sign in to view the complete answer paper.
Why counter balancing of rope is required in a shaft winding? Explain any one method in detail, with suitable diagram.
Answer
Sign in to view the complete answer paper.
Explain the constructional features and working principle of load haul dumper.
Answer
Sign in to view the complete answer paper.
Write short note on the Hydraulic power pack.
Answer
Sign in to view the complete answer paper.
Explain the performance and characteristics of centrifugal pump, with suitable diagrams.
Answer
Sign in to view the complete answer paper.
Explain in detail, with a suitable layout drainage system in an underground coal mine.
Answer
Sign in to view the complete answer paper.
What is blast hole drill? Explain in detail, with a line diagram, the constructional features and operational of a blast hole drills commonly used in opencast coal mines.
Answer
Sign in to view the complete answer paper.
Explain with a line diagram, the constructional features and operation of a hydraulic shovel. What are its advantages and limitations?
Answer
Sign in to view the complete answer paper.