Paper II — Q8
(a) Explain in detail the preparation of ice-cream with a flowchart and give the legal standards and various defects of…
(a) Explain in detail the preparation of ice-cream with a flowchart and give the legal standards and various defects of ice-cream. (20 marks) (b) Describe in detail the various methods of rendering of fallen animal carcasses. (15 marks) (c) Discuss in detail the various steps in canning of meat and various defects in cans. (15 marks)
हिंदी में प्रश्न पढ़ें
(a) प्रवाह आरेख के साथ आइस-क्रीम बनाने की विधि की विस्तारपूर्वक व्याख्या कीजिए एवं आइस-क्रीम के विधिक मानक तथा विभिन्न दोषों को बताइए । (20 अंक) (b) मृत पशुओं के शवों की रेंडरिंग करने की विभिन्न विधियों का विस्तार से वर्णन कीजिए । (15 अंक) (c) मांस की डिब्बाबंदी (कैनिंग) के विभिन्न चरणों एवं कैन के विभिन्न दोषों की विस्तार से चर्चा कीजिए । (15 अंक)
Directive word: Explain
This question asks you to explain. The directive word signals the depth of analysis expected, the structure of your answer, and the weight of evidence you must bring.
See our UPSC directive words guide for a full breakdown of how to respond to each command word.
How this answer will be evaluated
Approach
The question demands detailed explanatory responses across three distinct technology domains. Begin with a brief introduction acknowledging the importance of value-added dairy products, by-product utilization, and meat preservation in the Indian livestock economy. For part (a), allocate approximately 40% of time/words (20 marks) covering ice-cream preparation with a properly labelled flowchart, FSSAI legal standards (FSSAI, 2011), and defects like sandiness and shrinkage. For part (b), spend ~30% (15 marks) describing wet rendering, dry rendering, and steam rendering methods for fallen carcasses with their comparative advantages. For part (c), allocate remaining ~30% (15 marks) discussing canning steps from pre-cooking to cooling, and can defects including hydrogen swell and pinholing. Conclude by emphasizing food safety and economic significance in the Indian context.
Key points expected
- Part (a): Ice-cream preparation flowchart showing mixing → pasteurization → homogenization → ageing → freezing → hardening; FSSAI standards for milk fat (minimum 10%), total solids (minimum 36%), and overrun; defects including sandiness (lactose crystallization), shrinkage, and iciness
- Part (a): Legal standards under FSSAI Regulation 2011 for ice-cream, medium-fat ice-cream, and frozen dessert; compositional requirements and labelling distinctions
- Part (b): Wet rendering (tank rendering) with temperatures 115-120°C, dry rendering (batch or continuous) at 120-150°C, and steam rendering methods; comparative efficiency and fat quality
- Part (b): Handling of fallen animal carcasses under Prevention of Cruelty to Animals (Slaughter House) Rules, 2001; biosecurity and environmental considerations in rendering
- Part (c): Canning steps: pre-cooking → filling → exhausting → sealing → processing (retorting at 121°C, 15 psi) → cooling; thermal processing calculations
- Part (c): Can defects: mechanical defects (dents, leaks), chemical defects (hydrogen swell, sulfur staining), and microbiological defects; causes and detection methods
- Integration: Linkage between these technologies and Indian livestock sector—AMUL's ice-cream production, organized rendering plants under Fertilizer (Control) Order, and military/institutional meat canning
Evaluation rubric
| Dimension | Weight | Max marks | Excellent | Average | Poor |
|---|---|---|---|---|---|
| Demand-directive understanding | 15% | 7.5 | Correctly interprets 'explain' for (a) requiring process detail with visual aid, 'describe' for (b) needing systematic method coverage, and 'discuss' for (c) demanding evaluative step-wise analysis with defect causation; maintains appropriate depth balance across 20-15-15 mark distribution | Addresses all three parts but treats directives similarly without adjusting explanatory depth; either over-elaborates one part or gives superficial coverage to another | Misinterprets directives—lists instead of explaining, omits flowchart for (a), or fails to distinguish between methods in (b) and steps in (c) |
| Content depth & accuracy | 30% | 15 | Precise technical specifications: ice-cream pasteurization temperatures (68°C/30 min or 80°C/25 sec), FSSAI compositional limits, rendering temperatures with fat recovery rates, retort processing parameters (Fo values), and scientifically accurate defect mechanisms (lactose crystallization, hydrogen gas evolution) | Generally correct technical information but lacks specific parameters (e.g., mentions 'high temperature' without values) or has minor inaccuracies in standards or processing conditions | Significant technical errors—wrong temperatures, confused rendering methods, incorrect canning sequence, or outdated legal references; demonstrates fundamental knowledge gaps |
| Structure & flow | 20% | 10 | Clear tripartite structure with labelled sub-headings; flowchart for (a) is properly constructed with standard symbols and logical sequence; seamless transitions between preparation, standards, and defects in (a); method comparison table for (b); step-wise canning process with defect correlation in (c) | Basic structure present with identifiable parts but flowchart may be hand-drawn unclearly or omitted; some logical gaps between sections or repetitive content across parts | Poorly organized with mixed-up content across parts; missing flowchart where required; no clear progression within sections; illegible or illogical presentation |
| Examples / case-law / data | 20% | 10 | Cites FSSAI Regulations 2011 with specific notification numbers; references Prevention of Cruelty to Animals Rules; mentions AMUL/GCMMF, MILMA, or NDDB for ice-cream; cites Indian rendering industry capacity or export data; references Defence Food Research Laboratory (DFRL) Mysore for meat canning; includes specific microbial standards (SPC, coliform limits) | Mentions FSSAI and general regulatory framework without specifics; names some Indian dairy cooperatives or generic rendering applications; limited quantitative data | No Indian regulatory references; relies entirely on generic international examples; no institutional or industry references; completely misses legal standards component |
| Conclusion & analytical edge | 15% | 7.5 | Synthesizes the three technologies as integrated food safety and value-addition strategies for Indian livestock sector; critically examines challenges like cold chain infrastructure for ice-cream, environmental concerns in rendering, and self-reliance in processed meat; suggests innovations like HTST rendering, aseptic canning, or clean label ice-cream trends | Brief concluding paragraph summarizing main points without synthesis; generic statement on importance without sector-specific insight or forward-looking recommendations | No conclusion or abrupt ending; merely restates question components; no analytical integration or critical perspective on technological challenges and opportunities |
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