JAWAHARLAL NEHRU TECHNOLOGICAL UNIVERSITY HYDERABAD
JAWAHARLAL NEHRU TECHNOLOGICAL UNIVERSITY HYDERABAD B.Tech IV Year BASIC MECHANICAL ENGINEERING 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
Define Radiation.
Answer
Radiation is the process of heat transfer through electromagnetic waves that does not require a material medium for propagation. It occurs due to the thermal energy of matter and can take place even in a vacuum.
Relate point and path functions.
Answer
Point functions depend only on the state of the system and are independent of the path taken (e.g., pressure, temperature, volume). Path functions depend on the process path followed between two states (e.g., work, heat). Mathematically, point functions have exact differentials, while path functions have inexact differentials.
Outline the limitations of air conditioning.
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Summarize psychrometric processes.
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Label the significance of gears and gear trains.
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List the applications of hydraulic power devices.
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Define kinematics.
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Explain the significance of transmission angle in brief.
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List the limitations of rotodynamic machines.
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Label the principle of multistage air compressor.
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Part B
Analyze conduction in composite walls in detail.
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Discuss thermodynamic equilibrium and laws of thermodynamics.
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Distinguish between free and forced convection.
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What is steady and unsteady flow systems? Explain.
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Evaluate the construction and working of two and four stroke engines.
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Explain vapour compression cycle with neat diagram.
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Distinguish between S.I and C.I. engines.
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Analyze methods of air cooling.
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Judge various types of gears in detail.
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Explain interference in gears.
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Develop the principle of operation of gear trains.
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Evaluate the working of pneumatic power devices and their utilization.
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Analyze dwell mechanisms in detail.
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Explain principle and applications of universal joints.
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Explain displacement diagrams of cam and follower with uniform velocity, parabolic and simple harmonic motions.
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Discuss construction and working principle of single stage air compressor.
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Analyze free vibration. Write its limitations.
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Evaluate the construction and working principle of vibrators and shakers.
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Explain forced vibration with example.
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