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Bureau of Energy Efficiency (BEE) Placement-Paper Whole-Testpaper Thiruvanathapuram- 19 Aug 2011


Bureau of Energy Efficiency (BEE) Latest 2012-2013 Energy Manager and Auditor Written Test Examination Pattern and Syllabus

Bureau of Energy Efficiency (BEE) Latest 2012-2013 Energy Manager and Auditor Latest Placement papers with answers| Previous years Papers

Question bank for Energy Managers & Energy Auditors

Energy Managers & Energy Auditors Objective type questions and answers

Part – I: Objective type questions and answers

 1.  “The judicious and effective use of energy to maximize profits and enhance competitive positions”.  This can be the definition of:

a)  Energy conservation   

b)Energy management

c)  Energy policy   

d) Energy Audit

 

2.The energy management function is generally vested in –

(a) Senior Management

(b) One energy manager or co-ordinator

(c) Distributed among number of middle manager

(d) (b) & (c) together

 

3. The objective of energy management includes 

a)   Minimising energy costs  

b) minimising waste

c)   Minimising environmental degradation

d)all the above

 

4. The ratio of current year’s production to the reference year’s production is called as.(EA/EM)

a) demand factor

b)production factor

c) utilisation factor

d) load factor

 

5. Replacement of steam based hot water generation by solar system is an example of 

a)  matching energy usage to the requirement

b)  maximising system efficiency

c) Energy substitution

d) Performance improvement

 

6. One unit of electricity is equivalent to ___ kcal heat units.

a)  800 

b) 860 

c)  400 

d)  680

 

7. The benchmarking parameter for air conditioning equipment is

a) kW/Ton of Refrigeration 

b) kW/ kg of refrigerant handled

c)  kcal/m3 of chilled water 

d) Differential temperature across chiller

 

8. The percentage of energy saved at the current rate of use, compared to the reference year rate of use, is called 

a)  Energy Utilization  

b)Energy Performance

c)  Energy Efficiency  

d) None

 

9. Which instrument is used to monitor O, CO in flue gas? (EA)

a) Combustion analyzer  

b)  Power analyzer

c)  Pyrometer    

d)  Fyrite

 

10. Lux meter is used to measure…… (EA)

a) Illumination level 

b)  Sound intensity and illumination level

c)  Harmonics  

d)  Speed 

 

11. For a cement plant the parameter, “kWh/MT of clinker “indicates

a) Energy Index parameter 

b) Utility factor

c)  Production factor  

d) load factor

 

12. Energy manger should be well versed with

a)  Manufacturing and processing skills

b) Managerial and technical skills

c)  Technical and marketing skills

d)  Managerial  and commercial skills

 

13. An energy policy does not include

a) Target energy consumption reduction

b) Time period for reduction

c) Declaration of top management commitment

d)Future production projection

 

14. CO measurement of Fyrite kit is based on (EA)

a) Weight basis (dry)  

b)Volume basis (dry)

c) Weight basis (wet)  

d) Volume basis (wet)

 

15. Non contact speed measurements can be carried out by

a)  Tachometer 

b)Stroboscope

c)  Oscilloscope 

d) Speedometer

 

16. The tool used for performance assessment and logical evaluation of avenues for improvement in Energy management and audit is 

a)  Fuel substitution 

b) Monitoring and verification

c) Energy pricing 

d)Bench marking

 

17. Infrared thermometer is used to measure

a) Surface temperature 

b)  Flame temperature

c)  Flue gas temperature 

d)  Hot water temperature

 

18. Find out the ‘odd’ among the following choices for fuel substitution for industrial sector of India.

a) LDO with LSHS  

b) coal with rice husk

c) natural gas for fertilizer plant

d)LPG for soft coke

 

19. The various types of the instruments, which requires during audit need to be

a) easy to carry     

b) easy to operate

c) inexpensive   

d)all (a) to (c)

 

 

20. Air velocity in ducts can be measured by using ___ and manometer 

a)  Orifice meter  

b) Borden  gauge

c) Pitot tube   

d) Anemometer

Bureau of Energy Efficiency (BEE) Short type questions and answers

Part – II: Short type questions and answers

  1. List any four important factors involved in deciding final cost of purchased electricity. The factors which are involved in deciding final cost of purchased electricity are

• Maximum demand charges, kVA

• Energy Charges, kWh

• TOD Charges, Peak/Non-peak period

• Power factor Charge, P.F

  2. What are the principles of energy management?

The principles of energy management involve the following:

i) Procure all the energy needed at the lowest possible price

ii) Manage energy use at highest energy efficiency

iii) Reusing and recycling energy by cascading (waste heat recovery)

iv) Use the most appropriate technology

v) Reduce the avoidable losses

 

3. What is the need for managerial skills in energy management?

Managerial skills include bringing about awareness, motivating people at all levels, changing the structure & procedure, monitoring the energy consumption, norms target setting, etc. Both the organizational and people changes are required. For example, a mere awareness campaign in an industry on switching off lights, fans and air conditioners brought about a significant reduction in energy consumption.

 

4. What do you mean by energy audit?

Energy Audit is defined as “the verification, monitoring and analysis of use of energy  including submission of technical report containing recommendations for improving energy efficiency with cost benefit analysis and an action plan to reduce energy consumption”.

 

5. Explain how matching energy usage to requirement can enhance energy efficiency

Mismatch between equipment capacity and user requirement often leads to inefficiencies due to part load operations, wastages etc.  Worst case design, is a designer’s characteristic,while optimization is the energy manager’s mandate and many situations present themselves towards an exercise involving graceful matching of energy equipment capacity to end-use needs. 

Example:

• Eliminate throttling of a pump by impeller trimming, resizing pump, installing variable speed drives

 

6. Give any four bench marking parameters followed in equipment/utility related in Industries.

i) kWh/ton of refrigeration (on Air conditioning plant)

ii) %  thermal efficiency of a boiler plant

iii)  kWh/NM of compressed air generated

iv)  kWh /litre in a diesel power generation plant.

 

7. List any one energy audit instrument used for power measurement and one for flue gas measurement along with parameters to be measured?

Instrument Parameters measured  Portable power analyser used for power measurement  Combustion analyser used for flue gas measurement (zinconia cell board or electro mechanical cell board)

  8. What is the significance of an energy policy?

A written energy management policy will guide efforts to improve energy efficiency,  and represents a commitment to saving energy. It will also help to ensure that the success of the program is not dependent on particular individuals in the organization. An energy management policy statement includes a declaration of commitment from senior management, as well as general aims and specific targets relating to:  

Energy consumption reduction (electricity, fuel oil, gas, petrol etc.)

Energy cost reduction (by lowering consumption and negotiating lower unit rates)

 Timetables

 Budgetary limits

 Energy cost centers

 Organization of management resources.

 

9. How do you classify energy conservation measures?

Based on energy audit and analyses of the plant, a number of potential energy saving  projects may be identified. These may be classified into three categories:

1. Low cost – high return;

2. Medium cost – medium return;

3. High cost – high return 

 

10. Define ‘energy management’.

The judicious and effective use of energy to maximize profits (minimize the costs) and  enhance competitive positions.

 

11. List steps involved in pre-audit phase.

Pre-audit phase:

Plan and organise

Walk through audit

Informal interview with plant personnel

 

12. What are the factors to be considered before procuring fuels for energy efficiency and economics? 

The following factors should be considered before procurement of fuel for energy efficiency and economics:

o Price at source, transport charge, type of transport

o Quality of fuel

o Energy content

 

13. What are the few comparative factors need to be looked in to for external benchmarking used for inter-unit comparison and group of similar units? 

Few comparative factors, which need to be looked into while benchmarking externally are:

• Scale of operation

• Vintage of technology

• Raw material specifications and quality

• Product specifications and quality

 

14. What is the objective of energy management?

The objectives of energy management is to achieve and maintain optimum energy  procurement, utilisation throughout the organisation and

a) To minimise energy costs/ waste without affecting production & quality

b) To minimise environmental effects

 

15. What are the few important technical feasibility parameters that one should consider during analysis of energy conservation opportunities? 

The technical feasibility should address the following issues:

• Technology availability, space, skilled manpower, reliability, service etc

• The impact of energy efficiency measure on safety, quality, production or process.

• The maintenance requirements and spares availability

 

16. Define the energy audit as per the energy conservation Act 2001?

As per the Energy Conservation Act, 2001, Energy Audit is defined as “the verification,  monitoring and analysis of use of energy including submission of technical report containing recommendations for improving energy efficiency with cost benefit analysis and an action plan to reduce energy consumption”. 

 

17. What do you understand by ‘plant energy performance’ (PEP)?

Plant energy performance (PEP) is the measure of whether a plant is now using more or  less energy to manufacture its products than it did in the past: a measure of how well the energy management programme is doing.  It compares the change in energy consumption from one year to the other considering production output. Plant energy performance monitoring compares plant energy use at a reference year with the subsequent years to

determine the improvement that has been made.

 

18. What are fuel substitution and list one example of fuel substitution?

Fuel substitution is substituting existing fossil fuel with more efficient and less cost / less  polluting fuels such as natural gas, biogas, and locally available agro residues. E.g. Natural gas is increasingly the fuel of choice as fuel and feedstock in fertilizers, petrochemicals, power and sponge iron industries.

 

19. What are the base line data that an audit team should collect while conducting detailed energy audit? 

The audit team should collect the following baseline data:

- Technology, processes used and equipment details

- Capacity utilisation

- Amount & type of input materials used

- Water consumption

- Fuel Consumption

- Electrical energy consumption

- Steam consumption

- Other inputs such as compressed air, cooling water  etc

- Quantity & type of wastes generated

- Percentage rejection / reprocessing

- Efficiencies / yield

 

20. List at least four examples falling under “optimising the input energy requirements” while maximizing system efficiency? 

• Shuffling of compressors to match needs.

• Periodic review of insulation thickness

• Identify potential for heat exchanger networking and process integration.

• Optimisation of transformer operation with respect to load.

 

Part – III Long type questions and answers

 

1. Briefly explain with examples on fuel and energy substitution 

Fuel substitution: Substituting existing fossil fuel with more efficient and less cost/less  polluting fuel such as natural gas, biogas and locally available agro-residues.

Energy is an important input in the production. There are two ways to reduce energy  dependency; energy conservation and substitution. 

Fuel substitution has taken place in all the major sectors of the Indian economy. Kerosene and Liquefied Petroleum Gas (LPG) have substituted soft coke in residential use. 

Few examples of fuel substitution

 

 Natural gas is increasingly the fuel of choice as fuel and feedstock in the fertilizer, petrochemicals, power and sponge iron industries.

Replacement of coal by coconut shells, rice husk etc.

Replacement of LDO by LSHS

Few examples of energy substitution

Replacement of electric heaters by steam heaters

Replacement of steam based hot water by solar systems

 

2. Distinguish between ‘preliminary energy audit’ and ‘detailed energy audit’?

 

Preliminary energy audit is a relatively quick exercise to:

 Establish energy consumption in the organization

 Estimate the scope for saving

 Identify the most likely (and the easiest areas for attention)

 Identify immediate (especially no-/low-cost) improvements/ savings

 Set a ‘reference point’

 Identify areas for more detailed study/measurement

 Preliminary energy audit uses existing, or easily obtained data

Whereas, detailed energy audit

• Provides a detailed energy project implementation plan for a facility, since it evaluates  all major energy using systems.

•  Offers the most accurate estimate of energy savings and cost.

• Considers the interactive effects of all projects, accounts for the energy use of all major equipment, and

• Includes detailed energy cost saving calculations and project cost.

 Arrives energy balance based on an inventory of energy using systems, assumptions of current operating conditions and calculations of energy use. This estimated use is then

compared to utility bill charges.

 

3. Give a typical energy audit reporting format.

After successfully carried out energy audit energy manager/energy auditor should report to the top management for effective communication and implementation. A typical energy

audit reporting contents and format are given below. The following format is applicable for most of the industries. However the format can be suitably modified for specific requirement applicable for a particular type of industry. 

 Acknowledgement

 Executive summary - Energy audit options at a glance and recommendations

 Introduction about the plant Production process description

 Energy and utility system description

 - List of utilities

 - Brief description of each utility

 Detailed process flow diagram and energy and material balance

 Energy efficiency in utility and process systems

 Energy conservation options and recommendations

 - List of options in terms of no cost / low cost, medium cost, and high investment cost,  annual energy and cost savings, and pay back

 - Implementation plan for energy saving measures / projects

 Annexures

 

4. Write down the steps involved in ‘Energy management Strategy’? (EA)

1. Identify a strategic corporate approach

2. Appoint energy manager

3. Set up an energy monitoring and reporting system

4. Conduct energy audit

5. Prepare an energy management policy statement

6. Prepare and undertake a detailed project implementation plan

7. Implement a staff awareness and training program

8. Annual review

 

5. List steps involved in ‘detailed energy audit’. (EA)

Pre-audit phase:

Plan and organise

Walk through audit

Informal interview with plant personnel

Audit phase:

Primary data collection

Conduct survey and monitoring

Conduct detailed trials and experiments

Analysis of energy use

Identification and development of energy conservation opportunities

Cost benefit analysis

Report preparation and presentation to the plant personnel and management

Post audit phase:

Implementation and follow-ups

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