Question

(a) Select eight correct statements from the following list. You will get one mark for every correct statement selected, but you will lose one mark for any incorrect statement you select, so do not just guess. No-one will go below 0 mark regardless of how many incorrect statements are selected.
1. The tonne of oil equivalent (toe) is a unit of power. 2. Thermal energy can be entirely converted into mechanical energy using an internal combustion engine. 3. At present, coal is the most abundant fossil-fuel in the word. 4. In the UK, oil-fired power production has been phased out following the high price of oil and the stringent emission limits introduced with the EU Large Combustion Plant Directive. 5. SOx and NOx emission is a greater issue in the operation of CCGT power plants rather than of coal-fired power plants. 6. Nuclear fusion is currently employed for electricity production in the UK. 7. In wind turbines, electromagnetic induction is essential to convert rotor kinetic energy into electrical energy. 8. A hydrogen fuel cell converts electricity into H2 and O2. 9. Semiconductor materials are essential for the operation of photovoltaics. 10. Stall and pitch control allow the safe operation of wind turbines. 11. Heat is always transferred from a hot to a cold body resulting is an overall decrease of entropy in an isolated system. 12. Impulse water turbines are ideal for high-head and low-flow hydro energy production. 13. Heat pumps are used to transfer heat from a warm to a cold environment. 14. District heating can be a form of Combined Heat and Power. 15. In the UK, tidal ebb generation provides four power generation peaks a day. 16. Information & Communication Technolo

Answer 1

1. INCORRECT- toe is a unit of energy. It is the amount of energy released by burning one tonne of crude oil.
2. INCORRECT- Thermal energy cannot be "entirely" converted into mechanical energy by ICE.
3. CORRECT.
4. INCORRECT-
5. INCORRECT- NOx, SOx and CO2 emissions are higher in coal plants than in gas plants or CCGT.
6. CORRECT
7. CORRECT
8. INCORRECT-A hydroge fuel cell converts the chemical energy in hydrogen and oxygen into direct current electrical energy by electrochemical reactions.
9. CORRECT
10. CORRECT
11. INCORRECT-The second law of thermodynamics states that the entropy of an isolated system never decreases, because isolated systems always evolve toward thermodynamic equilibrium, a state with maximum entropy.
12. CORRECT
13. INCORRECT- Heat pump aborb heat from one place and transfer to another.
14. CORRECT
15. INCORRECT-Tidal stream has maximum output at half tide and is therefore the ideal 6 hours offset from the two daily peaks of ebb mode generation.

16th question is incomplete, so couldnt answer.