ME-803-B Energy Conservation, Management and Audit - Jun 2025 Question Paper

Under each question, How to answer lists the points an answer should cover, outlined by CampusPrep from the syllabus. Check the details against your textbook.

1. 6 Marks
   aWrite a short description about Availability-Based Tariff (ABT).
   How to answer

   • Define Availability-Based Tariff (ABT) and its purpose in grid discipline
   • Explain its three components: capacity charge, energy charge, UI charge
   • Mention frequency-linked pricing and benefits for grid stability
2. 8 Marks
   bExplain the difference between energy conservation and energy efficiency with suitable example?
   How to answer

   • Define energy conservation as behavioural / usage reduction
   • Define energy efficiency as technological output per unit energy
   • Compare objectives, approach and permanence with suitable examples
3. 6 Marks
   aBriefly Explain Renewable Purchase Obligation (RPO) and means by which this requirement can be met?
   How to answer

   • Define Renewable Purchase Obligation (RPO) and obligated entities
   • Explain solar and non-solar RPO targets
   • Explain means to meet: own generation, purchase, REC mechanism
4. 8 Marks
   bDescribe properly the ten steps methodology for conducting detailed energy audit?
   How to answer

   • List the ten steps of detailed energy audit in sequence
   • Briefly describe objective of each step from walk-through to reporting
   • Emphasize data collection, analysis and recommendations
5. 6 Marks
   aWhat are the areas that need to be focused during pre-audit phase?
   How to answer

   • Define pre-audit phase and its purpose
   • List focus areas: energy consumption data, processes, major equipment
   • Explain site familiarization and audit planning
6. 8 Marks
   bExplain the role of following energy audit instruments in detail?

   1. i)Infrared Thermometer
   2. ii)Stroboscope
   How to answer

   • Explain working principle of Infrared Thermometer for temperature measurement
   • Explain working principle of Stroboscope for speed measurement
   • Explain their specific uses in energy audit of electrical/thermal systems
7. 6 Marks
   aA Solution which contains 10% solids is mixed with 25% solid solution. A single output which is 20% solid is removed. If the 10% solution enters at 5 kg/s, what are the other rates. (assume there is no accumulation)?
   How to answer

   • Apply overall mass balance and solids mass balance with no accumulation
   • Use given 10% feed at 5 kg/s and 20% outlet to solve equations
   • Calculate 25% stream rate and 20% product rate
8. 8 Marks
   bA furnace shell has to be cooled from $90^{\circ}C$ to $55^{\circ}C$. The mass of the furnace shell is 2 tones, heat of furnace shell is $0.2$ kcal/kg$^{\circ}C$. Water is available at $28^{\circ}C$. The maximum allowed increase in water temperature is $5^{\circ}C$. Calculate the quantity of water required to cool the furnace. Neglect heat loss?
   How to answer

   • Calculate heat released by furnace shell: $Q=m c \Delta T$
   • Equate to heat gained by cooling water: $Q=m_w c_w \Delta T_w$
   • Calculate required mass/quantity of water neglecting losses
9. 6 Marks
   aExplain the Sankey diagram with a suitable example?
   How to answer

   • Define Sankey diagram as energy flow diagram with width proportional to flow
   • Describe components: inputs, useful output, losses
   • Give suitable example e.g., boiler/furnace with diagram
10. 8 Marks
    bExplain the any five power loss area and their possible efficiency improvement for energy efficient motors?
    How to answer

    • List five loss areas in motors: stator copper, rotor, core, friction-windage, stray load
    • Explain cause of each loss
    • Suggest efficiency improvement measures for each
11. 6 Marks
    aList at least 5 steps involved in CUSUM analysis?
    How to answer

    • Define CUSUM analysis for monitoring energy performance
    • List steps: baseline, predicted consumption, variance, cumulative sum, plot interpretation
    • Mention identification of savings or increased consumption
12. 8 Marks
    bExplain with a sketch the concept of pump head flow characteristics and system resistance?
    How to answer

    • Define pump head-flow (H-Q) characteristic curve
    • Define system resistance curve and operating point
    • Explain with sketch how intersection determines operation and effect of speed/valve
13. 6 Marks
    aAs a means of performance evaluation, explain the difference between efficiency and evaporation ratio?
    How to answer

    • Define boiler efficiency (heat output / heat input)
    • Define evaporation ratio (steam generated / fuel consumed)
    • Differentiate purpose, formula and use as performance indicators
14. 8 Marks
    bExplain the direct testing method of boiler with suitable sketch and flow chart?
    How to answer

    • Define direct method: efficiency = heat in steam / heat in fuel
    • List measurement parameters and procedure steps
    • Provide sketch of boiler with measurement points and flow chart of procedure
15. 14 Marks
    Write short note on: (Any two)

    1. a)Energy Conservation in transportation
    2. b)Energy Management Information System (EMIS)
    3. c)Sensitivity and Risk analysis
    How to answer

    • Select any two topics from given three options
    • Define concept and relevance to energy conservation/management
    • Mention key measures, benefits and applications