Energy saving module questions part 1
Question
A1. One of the most basic goals of an energy audit is to determine the cost of energy that a facility
uses.
A. True
B. False
A2. What is the first questions to ask when auditing a new facility.
What is your account ?
A3. What are the three questions that need to be answered for any new project?
1. Cost
2. Benefit
3. Risk
C1. Either a Bourdon gauge or a Pitot Tube can be used to measure air velocity.
A. True
B. False
C2. The position of a thermocouple probe makes a big difference in the temperature readings that
can be obtained.
A. True
B. False
C3. A very good estimate of the real temperature of an object can be found from its emitted
radiation.
A. True
B. False
C4. Which instrument is used to measure relative humidity?
A. Psychrometer
B. Pyrometer
C. Thermometer
D. Anemometer
C5. What instrument would you commonly use to measure the current in an AC circuit?
A. Ohmmeter
B. Ampmeter or ammeter
C. Wattmeter
D. None of the above
C6. A chart recorder can be used to monitor an electrical system for intermittent power quality
problems?
A. True
B. False
, Energy saving module questions part 1
Question
E1. How many KJ are in 10 kWh?
E2. How many kJ are there in 1,000 cubic meters of natural gas?
E3. The steam boiler for a facility can operate on LPG or oil. Using LPG gas at R20 per kg and
45,650kj/kg the boiler is 75% efficient. Using diesel oil at R7/L and 39,000 kj/L, the boiler is 78%
efficient. Wich fuel source provides the lowest operating cost (R/GJ)?
E4. Select 1 kWh as the common unit of steam output for the previous question (R/kWh).
E5. For a large boiler, you have the choice of the following energy sources. Calculate the POU cost
per GJ for each.
Natural gas at R4.00 per m3 , Eff = 88%
#2 feul oil at R7.00/litre, Eff = 86%
Electricity at R1.00/kwh, Eff = 97%
E6. If electricity costs $0.6 per kilowatt-hour and is used for electric heating with an efficiency of
100%, what is the equvilent price of natrrual gas per gigajoule if it can be burned with an efficiency
of 80% ?
A. $8.00/GJ
B. $13.30/GJ
C. $15.10/GJ
D. $21.20/GJ
E. $24.30/GJ
E7. In operating a boiler with dual feul capability, wich is the lowest cost of fuel given the
following:Natraul gas 44.00/GJ efficiency = 92%,fuel oil $123/ton efficiency = 88% (42,000kJ/Kg).
A. Narrual gas
B. Fuel oil
Question
F1. An office building has 10.00 square meters of conditioned floor space and uses 2.0 million kWh
and 6800 GJ of natural gas in one year. Convert the electric and gas use into MJ by finding the
appropriate conversion factor. The cost of electricity is R1,232,000 per year, and the cost of gas is
R325,000 per year.
F2. Whar is the energy use index (EUI) for the building described in the previous question?
F3. What is the energy index (ECI) for the builing described in the previous question?
F4. A 1,000 square metre building consumes the following amounts of energy per year:
Natraul gas 500 GJ/year
Electricity 60,000 kWh/year
Question
A1. One of the most basic goals of an energy audit is to determine the cost of energy that a facility
uses.
A. True
B. False
A2. What is the first questions to ask when auditing a new facility.
What is your account ?
A3. What are the three questions that need to be answered for any new project?
1. Cost
2. Benefit
3. Risk
C1. Either a Bourdon gauge or a Pitot Tube can be used to measure air velocity.
A. True
B. False
C2. The position of a thermocouple probe makes a big difference in the temperature readings that
can be obtained.
A. True
B. False
C3. A very good estimate of the real temperature of an object can be found from its emitted
radiation.
A. True
B. False
C4. Which instrument is used to measure relative humidity?
A. Psychrometer
B. Pyrometer
C. Thermometer
D. Anemometer
C5. What instrument would you commonly use to measure the current in an AC circuit?
A. Ohmmeter
B. Ampmeter or ammeter
C. Wattmeter
D. None of the above
C6. A chart recorder can be used to monitor an electrical system for intermittent power quality
problems?
A. True
B. False
, Energy saving module questions part 1
Question
E1. How many KJ are in 10 kWh?
E2. How many kJ are there in 1,000 cubic meters of natural gas?
E3. The steam boiler for a facility can operate on LPG or oil. Using LPG gas at R20 per kg and
45,650kj/kg the boiler is 75% efficient. Using diesel oil at R7/L and 39,000 kj/L, the boiler is 78%
efficient. Wich fuel source provides the lowest operating cost (R/GJ)?
E4. Select 1 kWh as the common unit of steam output for the previous question (R/kWh).
E5. For a large boiler, you have the choice of the following energy sources. Calculate the POU cost
per GJ for each.
Natural gas at R4.00 per m3 , Eff = 88%
#2 feul oil at R7.00/litre, Eff = 86%
Electricity at R1.00/kwh, Eff = 97%
E6. If electricity costs $0.6 per kilowatt-hour and is used for electric heating with an efficiency of
100%, what is the equvilent price of natrrual gas per gigajoule if it can be burned with an efficiency
of 80% ?
A. $8.00/GJ
B. $13.30/GJ
C. $15.10/GJ
D. $21.20/GJ
E. $24.30/GJ
E7. In operating a boiler with dual feul capability, wich is the lowest cost of fuel given the
following:Natraul gas 44.00/GJ efficiency = 92%,fuel oil $123/ton efficiency = 88% (42,000kJ/Kg).
A. Narrual gas
B. Fuel oil
Question
F1. An office building has 10.00 square meters of conditioned floor space and uses 2.0 million kWh
and 6800 GJ of natural gas in one year. Convert the electric and gas use into MJ by finding the
appropriate conversion factor. The cost of electricity is R1,232,000 per year, and the cost of gas is
R325,000 per year.
F2. Whar is the energy use index (EUI) for the building described in the previous question?
F3. What is the energy index (ECI) for the builing described in the previous question?
F4. A 1,000 square metre building consumes the following amounts of energy per year:
Natraul gas 500 GJ/year
Electricity 60,000 kWh/year
