General Aspects of Energy Management & Energy Audit Available here with full solutions — 35 questions recovered from the 2013 exam:
Objective (1 mark)
35 of 50
Short (5 marks)
0 of 8
Long (10 marks)
0 of 6
This is not the complete paper. The questions below are the ones we could recover and verify; the rest of that year’s paper is not reproduced here. Every answer shown is checked against the 2014 BEE guidebook and carries its book section reference and an explanation.
Full paper pattern: Section-I 50×1 = 50 marks · Section-II 8×5 = 40 · Section-III 6×10 = 60 · Total 150, pass mark 75, 3 hours. ▶ Practice these interactively
Other years
Objective questions (1 mark) — 35
📖 §10.4 Ozone layer depletion
1. The depletion of Ozone layer is caused mainly by _________
nitrous oxide
carbon dioxide
choloroflourocarbons
methane gas
Answer: C) choloroflourocarbons
Confirmed vs Book-1 §10.4 — The book states the main chemical responsible for ozone depletion is chlorofluorocarbons (CFCs), used in refrigerators and air conditioners. UV breaks the C–Cl bond and the released chlorine atom destroys ozone; one Cl atom can destroy 10,000–100,000 ozone molecules. N2O, CO2 and CH4 are greenhouse gases, not the main ozone-depleting substances. (Book EOC Objective Q8.)
2. Which of the following statement is not true regarding energy security?
impaired energy security can even reduce agricultural output
energy security is strengthened by minimising dependence on imported energy
diversifying energy supply from different countries weaken energy security
increasing exploration to find oil and gas reserves improves energy security
Answer: C) diversifying energy supply from different countries weaken energy security
Confirmed vs Book-1 §1.14 — the book explicitly calls for 'diversification of sources of oil imports' and lists diversifying supply sources as a security strategy, so statement (c) reverses the book and is the untrue one. The book also warns that disruption in oil supply forces farmers to cut pump and tractor use, lowering agricultural output — making (a) true.
📖 §3.1 Energy types & forms — potential (stored) vs kinetic energy
3. The type of energy possessed by a charged capacitor is
kinetic energy
electrostatic
potential
magnetic
Answer: B) electrostatic
Confirmed vs Book-1 §3.1 — A charged capacitor stores energy in the electrostatic field between its plates (E = 1/2 CV²) - a form of stored potential energy, but specifically electrostatic energy.
📖 §3.3 Motor loads & motor loading — Examples 3.8 / 3.9 (nameplate kW = OUTPUT)
5. Nameplate kW rating of a motor indicates
input to the motor
rated output of the motor
no-load input to the motor
rated input to the motor
Answer: B) rated output of the motor
Confirmed vs Book-1 §3.3 — Book-1 §3.3: 'The name plate details of motor, kW or HP indicates the output of the motor at full load' - i.e. the rated shaft output, not the input.
📖 §11.4 Solar Electrical Energy (Solar Photovoltaic Technology)
6. What is the average conversion efficiency of a solar photo voltaic cell?
22%
15%
98%
50%
Answer: B) 15%
Confirmed vs Book-1 §11.4 Solar Electrical Energy (Solar Photovoltaic Technology) —
Book worked example: a 175 W panel of area 1.125 m² at 1000 W/m² → η = (175/(1.125 × 1000)) × 100 = 15.6%.
The chapter-end key states typical solar cell efficiency 10–15%.
Answer b (15%).
📖 §1.5 Global Primary Energy Reserves — R/P ratio definition
7. Which of the following statements with respect to Reserve / Production (R/P) ratio is true?
is a constant once established
varies every year with changes in production
varies every year with changes in reserves
varies every year with changes in production and reserves
Answer: D) varies every year with changes in production and reserves
Confirmed vs Book-1 §1.5 — 'if the reserves remaining at the end of the year are divided by the production in that year, the result is the length of time that the remaining reserves would last…'. Both the numerator (reserves, altered by discoveries and depletion) and the denominator (that year's production) change annually, so the ratio varies with changes in BOTH — it is never a constant.
📖 Book-1 §2.5 Integrated Energy Policy (Ch-2); linked to Ch-6 energy policy
8. Which issue is not addressed by Integrated Energy Policy of India?
consistency in pricing of energy
scope for improving supply of energy from varied sources
energy conservation, research and development
removal of subsidies for energy across all sectors
Answer: D) removal of subsidies for energy across all sectors
Confirmed vs Book-1 Book-1 §2.5 Integrated Energy Policy (Ch-2) — The Integrated Energy Policy (Expert Committee, Planning Commission, Aug 2006) was framed precisely because consistency in pricing of different types of energy was lacking, and to give direction on energy security (supply from varied sources) and on energy conservation and R&D - so (a), (b) and (c) ARE addressed. Blanket removal of subsidies across all sectors is not a feature of the policy; it seeks targeted, transparent subsidy and market-based pricing instead.
📖 §3.3 Power factor — power triangle kW/kVA/kVAr, PF = cosθ
9. In inductive and resistive combination circuit, the resultant power factor under AC supply will be
less than unity
more than unity
zero
unity
Answer: A) less than unity
Confirmed vs Book-1 §3.3 — With both resistance and inductance present the current lags the voltage by an angle 0 < θ < 90 deg, so PF = cosθ is less than unity (it is unity only for a purely resistive circuit).
📖 §6.4 Energy Policy and Planning - Develop an Energy Policy (formulation and ratification)
10. An energy policy at the plant level is to be preferably signed by
chief executive
energy Manager
energy auditor
chief executive with approval of state designated agency
Answer: A) chief executive
Confirmed vs Book-1 §6.4 Energy Policy and Planning — The guidebook says that after the policy is drafted 'it should be formally adopted and ratified by the head of the organisation' - at plant level this is the chief executive (the generic policy in the book is signed 'Approved: Chairman'). The energy manager (b) only drafts/coordinates it, the energy auditor (c) has no such role, and no approval of the State Designated Agency (d) is required for an internal company policy.
📖 §4.6 Benchmarking — Equipment/Utility related parameters
11. The energy benchmarking parameter for air conditioning equipment is
kW/Ton of Refrigeration
kW/ kg of refrigerant handled
kW/m3 of chilled water
kW/EER
Answer: A) kW/Ton of Refrigeration
Confirmed vs Book-1 §4.6 — Book §4.6 lists "kWh/ton of refrigeration (on Air-conditioning plant)" as the benchmark for A/C plant, i.e. kW/TR. kW/kg of refrigerant handled says nothing about cooling delivered, kW/m3 of chilled water ignores the temperature rise, and kW/EER is not a defined metric.
📖 §3.3 Electrical energy — P = V·I, energy = V·I·t, 1 kWh = 3.6 MJ
12. How much carbon dioxide emission will be reduced annually by replacing 60 Watt incandescent lamp with a 15 Watt CFL Lamp, if emission per unit is 1 kg CO2 per kWh and annual burning is 3000 hours?
45 ton
3 ton
0.135 ton
183 ton
Answer: C) 0.135 ton
Confirmed vs Book-1 §3.3 — Saving = (60 - 15) W x 3000 h = 135,000 Wh = 135 kWh per year. CO2 avoided = 135 x 1 kg = 135 kg = 0.135 tonne. Book-1 Ch.3, Electrical energy — P = V·I, energy = V·I·t, 1 kWh = 3.6 MJ.
📖 §1.13 Electricity Pricing in India — demand side management
13. Which of the following statement is not correct regarding Demand Side Management (DSM)?
agriculture and municipalities are potential areas for DSM activities
savings accrued through DSM cannot be treated as avoided capacity on supply side
under DSM, demand can be shifted from peak to off peak hours thereby avoiding imported power during peak hours
DSM programs may result in demand as well as energy reduction
Answer: B) savings accrued through DSM cannot be treated as avoided capacity on supply side
Confirmed — energy and demand saved through DSM removes the need to build fresh generating capacity, so DSM savings ARE treated as avoided capacity (equivalent to a supply-side addition). Statement (b) denies this and is therefore the incorrect statement; (a), (c) and (d) all describe genuine DSM practice.
📖 §7.3 Financial Analysis Techniques — Net Present Value Method
14. _________ considers impact of cash flow even after payback period
net present value
return on investment
sensitivity analysis
simple payback period
Answer: A) net present value
Confirmed vs Book-1 §7.3 — Book: NPV 'considers the cash flow stream in entire project life', i.e. it values every cash flow including those arising after the simple payback point.
ROI and simple payback ignore post-payback cash flows and the time value of money; sensitivity analysis is a risk test, not a cash-flow criterion.
15. __________ determines the project viability in response to changes in input parameters.
Life cycle analysis
Financial analysis
Sensitivity analysis
Payback analysis
Answer: C) Sensitivity analysis
Confirmed vs Book-1 §7.5 — Book, Section 7.5: sensitivity analysis asks 'How sensitive is the project's feasibility to changes in the input parameters?' and identifies the switching values at which the decision flips from accept to reject.
So it is sensitivity analysis that tests viability against changes in the inputs.
16. The annual electricity bill for a plant is Rs 110 lakhs and accounts for 38% of the total energy bill. Furthermore the total energy bill increases by 5% each year. The plant’s annual energy bill at the end of the third year will be about ________
Rs 335 lakhs
Rs 268 lakhs
Rs 386 lakhs
Rs 418 lakhs
Answer: A) Rs 335 lakhs
Confirmed vs Book-1 Ch.3 — Total energy bill now = 110/0.38 = Rs 289.5 lakh. Escalating at 5% p.a. for three years: 289.5 x (1.05)³ = 289.5 x 1.1576 = Rs 335 lakh.
📖 §7.3 Financial Analysis Techniques — Return on Investment (ROI)
17. For a project to be financially attractive, ROI must always be ___ than interest rate.
lower
higher
equal
no relation
Answer: B) higher
Confirmed vs Book-1 §7.3 — Book: 'ROI must always be higher than cost of money (interest rate) so as to make the project attractive.'
A project returning less than the interest rate cannot service the cost of the funds.
18. A sum of Rs 100,000 is deposited in a bank at the beginning of a year. The bank pays 10% interest annually. How much money will be in the bank account at the end of the fifth year, if no money is withdrawn?
161050
150000
155000
160000
Answer: A) 161050
Confirmed vs Book-1 Ch.3 — Compound interest: A = P(1+i)^n = 1,00,000 x (1.10)^5 = 1,00,000 x 1.61051 = Rs 1,61,051 (approx. 1,61,050). Book-1 Ch.3, Book-1 Ch.6 Financial Management — project appraisal (outside Ch-3 text).
19. The technique used for scheduling the tasks and tracking of the progress of energy management projects through a bar chart is called
CPM
Gantt chart
CUSUM
PERT
Answer: B) Gantt chart
Confirmed — Book-1 (project monitoring, outside the Ch-9 text): a Gantt chart is the bar-chart technique for scheduling tasks and tracking progress of energy-management projects against time. CPM/PERT are network techniques and CUSUM is a cumulative-deviation energy chart, not a scheduling tool. Answer (b).
20. Which of the following is not an environmental issue of global significance?
ozone layer depletion
global Warning
loss of Biodiversity
suspended particulate Matter
Answer: D) suspended particulate Matter
Confirmed vs Book-1 §10.2 — The book lists exactly four issues of global significance: acid rain, ozone layer depletion, global warming & climatic change, and loss of biodiversity. Suspended Particulate Matter is a LOCAL air-quality problem confined to the area around the source, so it is not global. (Book EOC Objective Q6.)
📖 §11.5 Wind Energy (Power available from the wind turbine)
22. If the wind speed doubles, energy output from a wind turbine will be:
2 times higher
4 times higher
6 times higher
8 times higher
Answer: D) 8 times higher
Confirmed vs Book-1 §11.5 Wind Energy (Power available from the wind turbine) —
Book: ‘Doubling the wind speed increases the power by eight times, but doubling the turbine area only doubles the power.’
This follows from P ∝ V³: 2³ = 8.
Answer d.
23. Which of the following two statements are true regarding application of Kaizen for energy conservation? i) Kaizen events are structured for reduction of only energy wastes ii) Kaizen events engage workers in such a way so that they get involved in energy conservation efforts iii) Implementation of kaizen events takes place after review and approval of top management iv) In a Kaizen event, it may happen that small change in one area may result in significant savings in overall energy use
ii & iv
i & iii
iii & iv
i & iv
Answer: A) ii & iv
Confirmed vs Book-1 §6.8 Management Tools — Only (ii) and (iv) match the book: kaizen events engage employees so they stay enrolled in energy conservation, and a small change in one area (plant layout/material flow) can give a big reduction in overall energy use. Statement (i) is wrong - kaizen events focus on reducing various forms of waste, of which energy is only one; statement (iii) is wrong - kaizen depends on immediate action by the operator and supervisor, not on prior top-management review.
📖 §1.13 Electricity Pricing in India — Time of Day tariff
24. Which of the following statements regarding TOD tariff is true?
an incentive to induce user to draw more power during peak period
discourages user from drawing more power during off peak period
both a and b are true
none of the above
Answer: D) none of the above
Confirmed — a ToD tariff charges MORE during peak hours and LESS during off-peak hours, so it discourages peak drawal and encourages off-peak drawal. Statement (a) inverts the peak incentive and (b) inverts the off-peak incentive, so neither is true and 'none of the above' is correct.
25. The ozone layer in the stratosphere acts as an efficient filter for ____
UV- B rays
X-rays
Gamma rays
beta rays
Answer: A) UV- B rays
Confirmed vs Book-1 §10.4 — 'The ozone layer is highly beneficial to life on earth as it blocks the sun's Ultraviolet radiations (UV-B) from reaching the earth.' Depletion increases UV-B at the surface, causing skin cancer, eye disease and ecosystem damage.
26. Which of the following macro factors is used in the sensitivity analysis of project finance?
Change in tax rates
Changes in maintenance cost
Changes in debt: equity ratio
Change in forms of financing
Answer: A) Change in tax rates
Confirmed vs Book-1 §7.5 — Book lists MACRO factors as those the firm's management cannot change: changes in interest rates, CHANGES IN TAX RATES, accounting standards/depreciation methods and rates, subsidies, employment trends, regulations, energy price and technology changes.
Maintenance cost, debt:equity (capital structure) and form of finance are listed as MICRO factors.
27. Which among the following has the lowest Global Warming Potential?
Perflurocarbon
chloroflurocarbons
methane
nitrous oxide
Answer: C) methane
Confirmed vs Book-1 §10.5 — Table 10.1 GWPs: methane 23, nitrous oxide 300, PFC 5700, CFCs 4000–8000. Methane therefore has the lowest GWP of the four listed (CO2 = 1 is the reference and is not an option). (Book EOC Objective Q7.)
28. In a cumulative sum (CUSUM) chart, if the graph is going up, then
nothing can be said
actual and calculated energy consumption are the same
energy consumption is reduced
specific energy consumption is going up
Answer: D) specific energy consumption is going up
Confirmed vs Book-1 §9.6 — CUSUM = Σ(E_act - E_calc). A rising CUSUM line means actual energy exceeds the calculated (production-normalised) energy month after month, so the specific energy consumption is going up, i.e. performance is deteriorating. A horizontal line means actual = calculated. Answer (d).
Confirmed vs Book-1 §4.12 — Book §4.12: "The FYRITE employs the well-known Orsat method of volumetric analysis using chemical absorption of a sample gas" — the gas sample is absorbed and the change in VOLUME is read on the scale. Orsat/Fyrite readings are on a dry basis because the moisture is not part of the absorbed volume, so it is volume basis (dry), not any weight basis.
📖 Book-1 Ch.4 Energy Audit instruments (outside Ch-3 text)
30. Portable combustion analyzers may have in-built chemical cells for measurement of stack gas components. Which combination of chemical cells for measurement of stack gas components is not possible?
CO, SOx, O2
CO2, O2
O2, NOx, SOx, CO
O2, CO
Answer: B) CO2, O2
Confirmed vs Book-1 Ch.3 — Electrochemical cells are available for O2, CO, NOx and SOx, so combinations (a), (c) and (d) are possible. CO2 cannot be measured by a chemical cell (it needs an infra-red/NDIR analyser), so the O2 + CO2 combination is not possible.
📖 §3.4 Humidity — RH, specific humidity, DBT, WBT and dew point
31. The weight (kg) of the water vapour in each kg of dry air(kg/kg) is termed as :
Specific Humidity
relative humidity
humidity
saturation ratio
Answer: A) Specific Humidity
Confirmed vs Book-1 §3.4 — Book-1 §3.4: 'Specific Humidity or Humidity Ratio - It is the mass (kg) of the water vapour in each kg of dry air (kg/kg).' Relative humidity is a percentage ratio, not kg/kg.
📖 §5.1 Purpose of Material and Energy Balance (box)
32. Which of the following tool is made use of to assess the input, conversion efficiency, output, losses, quantification of all material, energy and waste streams in a process or system?
material balance
energy balance
material and energy balance
Sankey diagram
Answer: C) material and energy balance
Confirmed vs Book-1 §5.1 purpose box: material AND energy balance is used 'to assess the input, conversion efficiency, output and losses' and 'to quantify all material, energy and waste streams in a process or a system'. Only the combined material and energy balance covers all of these. Option (c).
33. If feed of 100 tonnes per hour at 10% concentration is fed to an evaporator, the product obtained at 25% concentration is equal to ____ tonnes per hour.
25
40
50
62.5
Answer: B) 40
Confirmed vs Book-1 §5.5 Ex.5.6: Solids in feed = 100 × 0.10 = 10 t/h and are conserved. Product at 25% concentration = 10/0.25 = 40 t/h. (Water evaporated = 60 t/h.) Option (b).
34. The fixed energy consumption of a company is 2000 kWh per month. The line slope of the energy (y) versus production (x) chart is 0.3. The energy consumed in kWh per month for a production level of 80,000 tons/month is
24,000 kWh
24,200 kWh
26,000 kWh
38,000 kWh
Answer: C) 26,000 kWh
Confirmed vs Book-1 §9.6 — E = 0.3 × 80,000 + 2,000 = 24,000 + 2,000 = 26,000 kWh/month. Option (a) 24,000 is the variable part only and omits the fixed base load C. Answer (c).
📖 §1.7 Indian Energy Scenario — Natural Gas Sector
35. The major constituent of natural gas is
Methane
Ethane
Propane
Hydrogen
Answer: A) Methane
Confirmed vs Book-1 §1.7 — 'Natural gas is a gaseous fossil fuel consisting primarily of methane but also includes small quantities of ethane, propane, butane and pentane.' Ethane and propane are present only in small quantities, and hydrogen is not a natural-gas constituent at all.