BEE 2017 Question Paper with Answers — Paper-1

1. To maximize the combustion efficiency, which of the following in the flue gas needs to be done?

1. maximize O2
2. maximize CO2
3. minimize CO2
4. maximize CO

2. An indication of sensible heat content in air-water vapour mixture is

1. wet bulb temperature
2. dew point temperature
3. density of air
4. dry bulb temperature

3. Which of the following is false?

1. electricity is high-grade energy
2. high grade forms of energy are highly ordered and compact
3. low grade energy is better used for applications like melting of metals rather than heating water for bath
4. the molecules of low grade energy are more randomly distributed than the molecules of carbon in coal

4. Which of the following is not applicable to liquid fuels?

1. the viscosity of a liquid fuel is a measure of its internal resistance to flow.
2. the viscosity of all liquid fuels decreases with increase in its temperature
3. higher the viscosity of liquid fuels, higher will be its heating value
4. viscous fuels need heat tracing

5. The benchmarking parameter for a vapour compression refrigeration system is

1. kW / kg of refrigerant used
2. kcal / m3 of chilled water
3. BTU / Ton of Refrigeration
4. kW / Ton of Refrigeration

6. Which of the following GHGs has the longest atmospheric life time?

1. CO2
2. CFC
3. Sulfur Hexafluoride (SF6)
4. perfluorocarbon (PFC)

7. In a boiler, fuel substitution of coal with rice husk results in

1. energy conservation
2. energy efficiency
3. both energy conservation and energy efficiency
4. carbon neutrality

8. Which of the following is not a part of energy audit as per the Energy Conservation Act, 2001?

1. monitoring and analysis of energy use
2. verification of energy use
3. submission of technical report with recommendations
4. ensuring implementation of recommended measures followed by review

9. Which of the following criteria is a responsibility of Designated Consumer?

1. designate or appoint an accredited Energy Auditor
2. adhere to stipulated energy consumption norms and standards as notified
3. submit the status of energy consumption information every three years
4. conduct energy audit through a certified energy auditor periodically

10. Which of the following is an energy security measure?

1. fully exploiting domestic energy resources
2. diversifying energy supply source
3. substitution of imported fuels for domestic fuels to the extent possible
4. all of the above

11. Which of the following statements are true? i) reactive current is necessary to build up the flux for the magnetic field of inductive devices ii) some portion of reactive current is converted into work iii) the cosine of angle between kVA and kVAr vector is called power factor iv) the cosine of angle between kW and kVA vector is called power factor

1. i & iv
2. ii & iii
3. i & iii
4. iii & iv

12. Assume CO2 equivalent emissions by the use of a 60 W incandescent lamp are of the order of 60 g/hr. If it is replaced by a 5 W LED lamp then the equivalent CO2 emissions will be

1. nil
2. 5 g/hr
3. 12 g/hr
4. 300 g/hr

13. Energy sources which are inexhaustible are known as

1. commercial energy
2. primary energy
3. renewable energy
4. secondary energy

14. As per Energy Conservation Act, 2001, a BEE Certified Energy Manger is required to be appointed/designated by the

1. state designated agencies
2. all industrial consumers
3. designated consumers
4. electrical distribution licensees

15. The retrofitting of a variable speed drive in a plant costs Rs 2 lakh. The annual savings is Rs 0.5 lakh. The maintenance cost is Rs. 5,000/year. The return on investment is

1. 25%
2. 22.5%
3. 24%
4. 27.5%

16. ______ is a statistical technique which determines and quantifies the relationship between variables and enables standard equations to be established for energy consumption.

1. linear regression analysis
2. time-dependent energy analysis
3. moving annual total
4. CUSUM

17. The power generation potential in mini hydro power plant for a water flow of 3 m3/sec with a head of 14 meters and with a system efficiency of 55% is

1. 226.6 kW
2. 76.4 kW
3. 23.1 kW
4. none of the above

18. 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

1. ii & iv
2. i & iii
3. iii & iv
4. i & iv

19. The electrical power unit Giga Watt (GW) may be written as

1. 1,000,000 MW
2. 1,000 MW
3. 1,000 kW
4. 1,000,000 W

20. The producer gas basically consists of

1. Only CH4
2. CO & CH4
3. CO, H2 & CH4
4. Only CO & H2

21. Which of the following statements is correct regarding ‘float’ for an activity?

1. Time between its earliest start time and earliest finish time
2. Time between its latest start time and latest finish time
3. Time between latest start time and earliest finish time
4. Time between earliest finish time and latest finish time

22. The Energy Conservation Act,2001 requires that all designated consumers should get energy audits conducted periodically by

1. certified energy manager
2. certified energy auditor
3. accredited energy auditor
4. state Designated Agencies

23. The term missing in the following equation (kVA)² = (kVA cosφ)² + ( ? )² is

1. cosφ
2. sinφ
3. kVA sinφ
4. kVArh

24. 2000 kJ of heat is supplied to 500 kg of ice at 0°C. If the latent heat of fusion of ice is 335 kJ/kg then the amount of ice in kg melted will be

1. 1.49
2. 83.75
3. 5.97
4. None of the above

25. An electric heater draws 5 kW of power for continuous hot water generation in an industry. How much quantity of water in litres per min can be heated from 30°C to 85°C ignoring losses?.

1. 1.3
2. 78.18
3. 275
4. none of the above

26. An electric heater consumes 1000 Joules of energy in 5 seconds. Its power rating is:

1. 200 W
2. 1000 W
3. 5000W
4. none of the above

27. The quantity of heat required to raise the temperature of a given substance by 1 °C is known as:

1. sensible heat
2. specific heat
3. heat capacity
4. latent heat

28. Which of the following parameters is not considered for external Bench Marking?

1. scale of operation
2. energy pricing
3. raw materials and product quality
4. vintage of technology

29. A sling psychrometer is used to measure :

1. only dry bulb temperature
2. only wet bulb temperature
3. both a & b
4. relative humidity

30. The number of moles of water contained in 36 kg of water is ------------

1. 2
2. 3
3. 4
4. 5

31. A process electric heater is taking an hour to reach the desired temperature while operating at 440 V. It will take ------- hours to reach the same temperature if the supply voltage is reduced to 220 V.

1. 2
2. 3
3. 4
4. 5

32. In a manufacturing plant, following data are gathered for a given month: Production - 1200 pieces; specific energy consumption - 1000 kWh/piece; variable energy consumption - 950 kWh/piece. The fixed energy consumption of the plant for the month is -------

1. 6,000 kWh
2. 10,000 kWh
3. 12,000 kWh
4. 60,000 kWh

33. The component of electric power which yields useful mechanical power output is known as

1. apparent power
2. active power
3. reactive power
4. none of the above

34. An oil fired boiler is retrofitted to fire coconut shell chips. Boiler thermal efficiency drops from 82% to 70%. What will be the percentage change in energy consumption to generate the same output

1. 12% increase
2. 14.6% increase
3. 17.1% decrease
4. 17.1% increase

35. A three phase induction motor is drawing 16 Ampere at 440 Volts. If the operating power factor of the motor is 0.90 and the motor efficiency is 92%, then the mechanical shaft power output of the motor is

1. 12.04 kW
2. 10.09 kW
3. 10.97 kW
4. None of the above

36. The energy conversion efficiency of a solar cell does not depend on

1. solar energy insolation
2. inverter
3. area of the solar cell
4. maximum power output

37. The cost of replacement of inefficient chiller with an energy efficient chiller in a plant was Rs. 10 lakh .The net annual cash flow is Rs 2.50 lakh .The return on investment is:

1. 18%
2. 20%
3. 15 %
4. none of the above

38. The contractor provides the financing and is paid an agreed fraction of actual savings achieved. This payment is used to pay down the debt costs of equipment and/or services. This is known as

1. traditional contract
2. extended technical guarantee/service
3. performance Contract
4. shared savings performance contract