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Home └Course 6 — Economics, Energy and Sustainability └Quiz 6: check your understanding

Course 6 — Economics, Energy and Sustainability

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Quiz 6: check your understanding

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1. What is the fair basis for comparing heating fuels?
Price per unit on the bill Cost per useful kWh delivered Calorific value only Appliance purchase price
2. At ₹9/kWh and COP 3.5, what is the heat pump's cost per useful kWh?
₹9.00 ₹31.50 ₹2.57 ₹5.50
3. 1 kg of LPG contains about how much energy (NCV)?
1.0 kWh 4.2 kWh 12.8 kWh 46 kWh
4. Simple payback equals:
Annual saving ÷ capex Extra capex ÷ net annual saving Capex × discount rate Fuel cost ÷ COP
5. Why does NPV discount future savings?
Equipment wears out Money today is worth more than money later Tariffs always fall Tax rules require it
6. Under a ToD tariff, the main role of a hot water tank is to:
Raise COP Let the heat pump run in cheaper hours Reduce water hardness Remove the need for a pump
7. Using an approximate grid factor of 0.7 kg CO₂/kWh and COP 3.5, CO₂ per useful kWh is about:
0.20 kg 0.70 kg 2.45 kg 0.05 kg
8. In India, 1 kWp of rooftop PV typically produces per day:
0.5–1 kWh 4–5 kWh 10–12 kWh 24 kWh
9. Which of these is NOT an Indian-origin green building rating?
IGBC GRIHA LEED None of these
10. What should a business case always be compared against?
The cheapest heat pump The "do nothing" baseline A competitor's quote Last year's budget