Question 1

Q.1. State the meaning and need of energy conservation.

Accepted Answer

Energy conservation means reducing energy consumption by using energy more efficiently, without reducing the level of service obtained; it is needed to extend fuel resource availability, reduce cost, and lower environmental impact.

Question 2

Q.2. Define auditing types.

Accepted Answer

The three types of energy audit are preliminary (walk-through) audit, detailed (comprehensive) audit, and investment-grade audit, differing in depth, duration, and precision of the analysis performed.

Question 3

Q.3. Difference between energy sources.

Accepted Answer

Energy sources differ mainly by renewability (renewable sources such as solar, wind, hydro are naturally replenished, while non-renewable sources such as coal, oil, and gas are finite) and by whether they are primary (raw, unconverted) or secondary (converted, such as electricity).

Question 4

Q.4. What are the tariff?

Accepted Answer

Tariffs are the structured rate schedules used by electricity utilities to bill consumers, typically comprising energy (kWh) charges, demand charges, and sometimes time-of-use and power-factor-based adjustments.

Question 5

Q.5. How benchmarking performance define?

Accepted Answer

Benchmarking performance is defined by comparing a facility's actual specific energy consumption against similar facilities, industry standards, or its own historical best performance, to quantify achievable savings potential.

Question 6

Q.6. Difference between audit methods.

Accepted Answer

Audit methods differ mainly in the direction of analysis: the direct (top-down) method starts from total plant input and allocates it downward, while the bottom-up (component-wise) method builds up total consumption from individually measured equipment loads, offering greater granularity.

Question 7

Q.7. Explain the scenario of energy.

Accepted Answer

The energy scenario refers to the current and projected state of energy demand, supply mix, and resource availability at a given time, generally showing rising demand alongside a gradual shift from fossil fuels toward renewable and low-carbon sources.

Question 8

Q.8. What are the issues of power quality?

Accepted Answer

Power quality issues include voltage sags/swells, harmonics, flicker, voltage unbalance, and transients, all of which can cause equipment malfunction, increased losses, and reduced equipment life.

Question 9

Q.9. Explain balast of electronic in energy.

Accepted Answer

Electronic ballasts control the current supplied to fluorescent/discharge lamps using high-frequency solid-state circuitry, replacing older magnetic ballasts, and thereby save substantial energy through reduced ballast losses, elimination of visible flicker, and improved lamp efficacy at high operating frequency.

Question 10

Q.10. How energy efficient in electrical systems?

Accepted Answer

Energy efficiency in electrical systems is achieved through measures such as power factor correction, use of energy-efficient motors and transformers, variable-speed drives, efficient lighting (LED/electronic ballast), and proper load management, all reducing electrical losses for the same useful output.

Question 11

Q.1. What is energy strategy for the future? Also explain energy conservation.

Accepted Answer

The energy strategy for the future centers on diversifying supply toward renewable and low-carbon sources, improving end-use efficiency, and strengthening grid infrastructure and storage; energy conservation - reducing waste and improving efficiency of use without cutting service levels - is the central, lowest-cost pillar of this strategy.

Question 12

Q.2. With the help of assumptions explain "Green House Effect".

Accepted Answer

The Green House Effect is the natural warming of the Earth's surface caused by certain atmospheric gases (carbon dioxide, methane, water vapour, and others) trapping outgoing infrared radiation, and is intensified by human fossil-fuel combustion, which increases atmospheric greenhouse gas concentration and drives global warming/climate change.

Question 13

Q.3. Explain various forms of energy with suitable methods.

Accepted Answer

Energy exists in various forms including mechanical (kinetic and potential), thermal, electrical, chemical, nuclear, radiant/solar, and electromagnetic energy, each convertible into other forms through defined physical/engineering processes such as combustion, generation, and various energy conversion devices.

Question 14

Q.4. For detailed energy Audit explain with ten steps.

Accepted Answer

Detailed energy audit is carried out in ten systematic steps: pre-audit planning, primary data collection, data analysis, site walk-through survey, detailed measurement/monitoring, energy balance/loss analysis, identification of energy conservation measures, cost-benefit/feasibility analysis, report preparation and presentation, and implementation and follow-up.

Question 15

Q.5. What instruments use for energy audit? Explain it.

Accepted Answer

Instruments used for energy audit include power/energy analyzers, clamp-on ammeters, infrared thermal imaging cameras, lux meters, combustion/flue-gas analyzers, tachometers, and ultrasonic leak detectors, each measuring specific electrical, thermal, lighting, or mechanical parameters needed to quantify actual facility energy consumption and losses.

Question 16

Q.6. Describe the approach for maximum demand control.

Accepted Answer

Maximum demand control is approached through load shedding/scheduling of non-critical loads, staggered start-up of large equipment, automated demand-limiting control systems, and better production scheduling, all aimed at reducing the facility's peak recorded demand and hence its demand-charge billing.

Question 17

Q.7. A 500 watt mercury vapour lamp was switched on for 6 hours per day, volt…

Accepted Answer

Using actual measured values (230V, 2A, PF=0.8), the mercury vapour lamp's actual power consumption is P=V×I×cosφ=230×2×0.8=368W, giving a daily energy consumption of 368×6/1000=2.208 kWh over the 6-hour operating period.

Question 18

Q.1. Describe the energy efficiency light control for assessing existing ligh…

Accepted Answer

Assessing the existing lighting system for energy efficiency involves surveying installed fixtures/lamp types, measuring actual illumination levels (lux) and comparing against required task illumination standards, calculating installed lighting power density, evaluating luminaire/lamp/ballast efficiency and control strategy, and identifying retrofit opportunities such as LED replacement, improved controls, and daylight harvesting.

Question 19

Q.2. Write procedure of solar hybrid power systems with suitable diagrams.

Accepted Answer

A solar hybrid power system combines solar PV generation with one or more complementary sources (diesel generator, battery storage, or grid connection) coordinated by a hybrid controller, following a systematic design procedure of load assessment, solar resource assessment, component sizing, system configuration, and control-strategy design, illustrated with a block-diagram representation of the overall architecture.

Question 20

Q.3. How energy efficiency for motors in electrical systems? Explain it.

Accepted Answer

Energy efficiency for motors in electrical systems is achieved through use of premium-efficiency (IE3/IE4-class) motors with improved core, winding, and mechanical design, correct motor sizing to avoid oversizing losses, variable-frequency drives for variable-load applications, power factor correction, regular maintenance, and periodic efficiency testing/monitoring to sustain performance over the motor's operating life.

Question 21

Q.4. Explain the role of training and awareness in energy management programme.

Accepted Answer

Training and awareness play a central role in energy management programmes by building the technical capability of personnel responsible for implementing conservation measures, and by cultivating a facility-wide conservation-conscious culture among all employees, since sustained energy savings depend as much on ongoing operational behavior and vigilance as on one-time technical retrofits.

Question 22

Q.5. What are the important features of the energy conservation act.

Accepted Answer

The Energy Conservation Act's important features include establishment of the Bureau of Energy Efficiency (BEE), designation of energy-intensive 'Designated Consumers' subject to mandatory energy audits and consumption norms, a standards-and-labeling scheme for appliances, the Energy Conservation Building Code, state-level designated agencies, certification of energy managers/auditors, and the Perform-Achieve-Trade (PAT) market-based efficiency scheme.

Electrical Energy Conversion And Auditing