JNTU
JNTU B.Tech IV DESIGN OF TRACTORS Previous Question Paper (May - 2019 - R15)
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 kingpin angle and write its importance?
Answer
Kingpin angle (or steering axis inclination) is the angle between the vertical line and the steering axis (kingpin) when viewed from the front of the vehicle. Its importance lies in providing directional stability and reducing steering effort by minimizing the scrub radius.
List out different components of tractor hydraulic system.
Answer
The main components include the hydraulic pump, control valve, hydraulic cylinder (ram), reservoir (oil tank), relief valve, filter, and piping/hoses.
Write is the principle of a hydraulic system.
Answer
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How the fuel consumption of tractor is measured?
Answer
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List out different types of PTO performance testes.
Answer
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Define camber and castor angle and write their importance.
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Write the advantages of hydraulic system of a tractor.
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What is hydrokinetic transmission?
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Define tractive efficiency.
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Define coefficient of traction and write its importance.
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Part B
Write classification and selection of tractors.
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Explain the methods for locating center of gravity of tractor.
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Explain the procedure for adding extra weight to front and rear wheels of tractor.
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Explain test for turning ability of tractor.
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Explain differential unit and final drive in a tractor.
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Explain power transmission system in tractors.
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Explain types of gears.
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Explain power outlets in the tractor.
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Explain adjustment of front wheel spacing of tractor.
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Explain hydraulic assisted mechanical steering.
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Explain steering geometry of a tractor.
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Explain steering system of a tractor.
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Explain position and draft control in the tractor.
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Explain different types of valves used in hydraulic system of tractor.
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Explain different types of hydraulic cylinders used in hydraulic system of tractor.
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Explain design principles of tractor’s driver seat.
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Explain tractive efficiency and wheel slip of a tractor.
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Explain PTO performance test for a tractor.
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List out different test items for agricultural tractor.
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Explain drawbar performance test for a tractor.
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