JAWAHARLAL NEHRU TECHNOLOGICAL UNIVERSITY HYDERABAD
JAWAHARLAL NEHRU TECHNOLOGICAL UNIVERSITY HYDERABAD B.Tech II AIRCRAFT PRODUCTION TECHNOLOGY Previous Question Paper (May-2019 - R15)
Note: This question paper contains two parts A and B. 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 and may have a, b, c as sub questions.
Part A
How casting processes contributes its role in aircraft production technology?
Answer
Casting allows for the production of complex, near-net-shape aircraft components with intricate internal geometries that are difficult to machine. It is essential for manufacturing engine parts, turbine blades, and structural fittings using lightweight alloys, ensuring high material utilization and reduced assembly time.
List out various equipments used in arc welding.
Answer
The essential equipment used in arc welding includes: 1) Power source (AC/DC transformer, rectifier, or generator), 2) Electrode holder, 3) Welding cables (ground and electrode leads), 4) Earth clamp, 5) Protective gear (helmet, gloves, apron), and 6) Shielding gas supply system (for MIG/TIG welding).
Distinguish between NC and CNC machining.
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Write a short note on super plastic forming.
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Write down the salient features of unconventional machining over conventional machining.
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Draw the schematic layout of abrasive jet machining and list the parts.
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What is the significance of heat treatment processes in production?
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List state of art initial stresses and the stress alleviation procedures.
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What are the equipments utilized for riveted joints?
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What is the need to inspect a machine element?
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Part B
Briefly explain the types of sand used in sand casting process. Also explain the criterion for selection of sand and mould.
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Distinguish between die and centrifugal casting.
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Explain the specific advantages and applications of thermit welding.
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Explain the oxy-acetylene gas welding technique. Explain with the help of neat sketches various gas welding equipments.
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Explain the following operations in bending: i) Stretch forming ii) spinning.
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Explain briefly the diffusion bonding.
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Illustrate various processes involved in machining and forming processes.
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Why automation is required for machining and forming processes.
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Explain the working principle of ultrasonic machining and its constructional features.
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Describe in detail the electric discharge machining with neat schematic layout.
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What are the factors that are considered to select an unconventional machining process.
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Differentiate Electro Chemical and Electric Discharge Machining.
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What differs to apply heat treatment process between aluminum alloys and titanium alloys?
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What techniques can be adopted to prevent corrosion for aircraft conventional materials?
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Explain in detail process of anodizing for titanium alloys.
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What are the different types of organic coatings? Explain any two methods of organic coatings.
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Explain in brief the stages of assembly followed in aircraft production.
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Explain the procedure steps for dye penetrate test. How the flaw defects can be identified using this technique?
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With the help of neat schematic layout explain the acoustic holography technique to inspect an aircraft component defects.
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Explain the merits and demerits of Non- Destructive Testing over Destructive testing.
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