Quiz

1. Primary energy sources
Which type of the energy source is not primary energy (please select one)?
A) Coal
B) Natural gas
C) Electricity
D) Wind

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2. Calorific value of energy sources
Which energy source has the highest calorific value (kJ/kg) (please select one)?
A) Wood
B) Lignite
C) Natural gas
D) Oil

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3. Heat exchange
Which type of heat exchange is based on the transfer of heat by electromagnetic waves (please select one)?
A) Convection
B) Heat transmittance
C)Conduction
D) Heat radiation

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4. Heat exchangers
What is the name of the process when heated or cooled air passes through a heat exchanger and heats or cools the fresh air (please select one)?
A) Heat transmittance
B) Heat recovery
C) Heat radiation
D) Infiltration

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5. Heat losses
Most of the heat in the building during winter is lost through (please select one):
A) The walls
B) The floor
C) The roof
D) The windows

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6. Heat energy units
What is the unit for expressing specific heat energy consumption (please select one)?
A) kWh/(pers x a)
B) kWh/m2
C) kWh/m2a
D) kW/(m2a)

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7. Room temperature
If in the heating season we increase the room temperature from 20 to 21 degrees Celsius, how much does our heating energy consumption increases (please select one)?
A) 2%
B) 4%
C) 6%
D) 8%

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8. Ventilation
Which is the fastest method of open window ventilation for exchanging stale room air for fresh air from outside (please select one)?
A) Intensive ventilation
B) cross-ventilation
C) open tilting of windows
D) with air conditioning

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9. Humidity
What percentage is the optimal humidity in living spaces (please select one)?
A) 20-40%
B) 30-50%
C) 40-60%
D) 50-70%

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10. CO2 emission factors
Which method of electricity generation has the highest CO2 emission factor (g CO2/kWh) (please select one)?
A) Gas fired Thermo Power Plant
B) Coal fired Thermo Power Plant
C) Wind Power Plant
D) Hydro Power Plant

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11. Units of power consumption
Every private household is billed by the electricity supplier. In which unit is the energy consumption generally expressed (please select one)?
A) Watt (W)
B) Kilowatt (kW)
C) Kilowatt hours (kWh)
D) Kilowatt years (kW-Y)

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12. Comparison of incandescent light bulbs and LED light bulbs
How high is the power dray (electricity consumption) of an incandescent light bulb compared to that of an energy-saving LED light bulb (please select one)?
A) twice as much
B) three times as much
C) four times as much
D) five or more times as much

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13. Incandescent light bulb losses
We are familiar with the fact that incandescent light bulbs become very hot, because a large fraction of the energy they produce is converted to heat. What percent of the electrical energy does a conventional incandescent light bulb convert to light (please select one)?
A) < 2 %
B) < 10 %
C) < 20 %
D) < 50 %

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14. Cooling appliance temperatures
What is the percentage of energy saved when the temperature of the cooling appliances is set 1° higher (please select one)?
A) 2 %
B) 4 %
C) 6 %
D) 8 %

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15. Estimating the cost of 1 Watt stand-by
Many devices, such as TVs and PCs use electricity even when they are in the ‘’stand-by’’ mode. Some older devices can consume up to 15 Watts in the ‘’stand-by’’ mode. What is the approximate cost for the household, if the price of electricity is 15 EUR cents/kWh, and one electrical appliance is constantly in the ‘’stand-by’’ mode, using 1 Watt of electricity, for one year (please select one)?
A) 0.10 EUR
B) 0.85 EUR
C) 1.30 EUR
D) 2.50 EUR

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16. Water consumption per person
What is the approximate water consumption per person per day (please select one)?
A) 30 litres
B) 100 litres
C) 120 litres
D) 120 m³

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17. Water consumption
Which of the following comprises the largest part of personal water consumption (please select one)?
A) Toilet flushing
B) washing laundry
C) bathing/showering
D) cooking/drinking

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18. Water stream regulators
If we install a water stream regulator that reduces the flow of water from the tap, in which of the below mentioned activities there will be no effect on water consumption (please select one)?
A) showering
B) bathing
C) brushing the teeth with water flowing
D) washing the dishes

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