--- title: Power stations and the grid — how Mova does on the tests · Technology description: Lesson 32 of the technology course of Mova's primary school: 7 of 11 tests right, exam 0 of 4, every question with the options, the student's choice, the right answer and why it chose. --- [Mova](https://md.mova.elamur.ai/free/en/) · [this page in HTML](https://mova.elamur.ai/free/en/school-run/technology/32-power-stations-and-the-grid/) [home](https://md.mova.elamur.ai/free/en/) / [at school](https://md.mova.elamur.ai/free/en/school-run/) / [Technology](https://md.mova.elamur.ai/free/en/school-run/technology/) / 32 # Power stations and the grid **Tests:** 7 of 11 right · **Exam:** 0 of 4 right · **Kind:** ★ · **Understood:** 10 of 15 · **Run:** 2026-10-18, commit `f3c23ea72` Lesson 32 of the technology course of Mova's primary school, as Mova's small model took its tests: it had read this lesson and the ones before it and learned from their exercises. Each test shows the options in the order the student saw them, its choice, the right answer, the score of every option and why it chose. The lesson itself, sentence by sentence with trees and pragmatics: [the lesson in the corpora](https://md.mova.elamur.ai/free/en/corpora/school/technology/32-power-stations-and-the-grid/). Every question of this lesson and each of its options parsed by Mova, with trees and pragmatics: [the lesson's questions in the corpora](https://md.mova.elamur.ai/free/en/corpora/questions/technology/32-power-stations-and-the-grid/). ### Test 1 · ★ · right ✓ {#t1} «that cooling tower is pumping out tons of smoke, gross» What is the best correction? - **1.** It is a cloud made by the Moon — no support - **2.** It is steam mixed with bits of uranium from the reactor — no support - **3.** The white cloud is water vapour, not smoke — **← Mova's choice** · **✓ the right answer** · score 5 - **4.** You are right, it is coal smoke — no support **Why:** It took the question to ask which statement is true. It chose option 3 with score 5, the only option with support. Its support: lesson 32, line 9: «The white cloud from a cooling tower is water vapour, not smoke; the towers are wide at the bottom and narrower in the middle, which helps air flow up through…», reached through the same lesson line as the sentence the question matched. What matched: the same doer «white cloud» (+2); the same thing acted on «water vapour» (+2); the same light verb (be, have, do, get, go) (+1). · [the question and its options parsed, with trees and pragmatics](https://md.mova.elamur.ai/free/en/corpora/questions/technology/32-power-stations-and-the-grid/t1/) ### Test 2 · ★ · right ✓ {#t2} In a cartoon, a hero climbs a pylon to fix a wire himself. What is the real rule? - **1.** Climbing is fine during the day — no support - **2.** Climbing is fine if the power is low that day — no support - **3.** Never climb a pylon; only trained engineers work on lines — **← Mova's choice** · **✓ the right answer** · score 8 - **4.** Climbing is fine as long as the hero wears thick rubber boots and gloves — no support **Why:** It took the question to ask what it is done to. It chose option 3 with score 8, the only option with support. Its support: lesson 16, line 17: «Never climb a pylon or into an electricity substation, even for a ball, and never touch a fallen wire; the power company gets things out safely.», reached through the remembered sentence the question matched. What matched: it fills the role the question asks for (+4); the same action «climb» (+2); the same thing acted on «pylon» (+2). · [the question and its options parsed, with trees and pragmatics](https://md.mova.elamur.ai/free/en/corpora/questions/technology/32-power-stations-and-the-grid/t2/) ### Test 3 · ★ · wrong ✗ {#t3} What would happen if a country built power stations but no pylons or wires? - **1.** Electricity would fly to homes through the air — **← Mova's choice** · no support - **2.** The electricity could not reach homes far away — **✓ the right answer** · no support - **3.** Homes would get more electricity than before — no support - **4.** Nothing, every home makes its own — no support **Why:** No option found support in what it remembers, so it guessed: it took the first option shown. · [the question and its options parsed, with trees and pragmatics](https://md.mova.elamur.ai/free/en/corpora/questions/technology/32-power-stations-and-the-grid/t3/) ### Test 4 · ★ · right ✓ {#t4} The final whistle blows and millions of people switch on kettles at once. What does the grid control room do? - **1.** Asks everyone on the TV to switch their kettles off again — score 8 - **2.** Nothing, kettles use no electricity — score 2 - **3.** Switches off half the country — no support - **4.** Adds power quickly from fast-starting stations — **← Mova's choice** · **✓ the right answer** · score 14 **Why:** It took the question to ask what is done. It chose option 4 with score 14, against 8 for the next best. Its support: lesson 32, line 3: «All the power stations and homes are joined in one big web called the grid, and people in a control room balance it every second. After a big football match, w…», reached through the remembered sentence the question matched. What matched: it fills the role the question asks for (+7); the same action «add» (+5); the same thing acted on «power» (+4). Against it: a different doer (counts against) (-2). · [the question and its options parsed, with trees and pragmatics](https://md.mova.elamur.ai/free/en/corpora/questions/technology/32-power-stations-and-the-grid/t4/) ### Test 5 · ★ · right ✓ {#t5} «storm knocked a wire down by the gate, it's just lying there, can i move it» What is the right answer? - **1.** Never touch it; keep away and tell an adult to call for help — **← Mova's choice** · **✓ the right answer** · score 4 - **2.** Move it if it is not sparking — no support - **3.** Move it if you wear gloves — no support - **4.** Move it with a dry wooden stick, that's safe because wood doesn't carry electricity — score 0 **Why:** It took the question to ask which statement is true. It chose option 1 with score 4, against 0 for the next best. Its support: lesson 16, line 17: «Never climb a pylon or into an electricity substation, even for a ball, and never touch a fallen wire; the power company gets things out safely.», reached through the option's own match among the sentences about the question's things. What matched: the same action «touch» (+2); the same thing acted on «fallen wire» (+2). · [the question and its options parsed, with trees and pragmatics](https://md.mova.elamur.ai/free/en/corpora/questions/technology/32-power-stations-and-the-grid/t5/) ### Test 6 · ★ · right ✓ {#t6} «bloody power's out again, light a candle» What is the safer choice? - **1.** Light several candles together — no support - **2.** Open the fridge to use its light — no support - **3.** Use a torch, not a candle — **← Mova's choice** · **✓ the right answer** · score 4 - **4.** Light the gas cooker for light — no support **Why:** It took the question to ask which statement is true. It chose option 3 with score 4, the only option with support. Its support: lesson 32, line 14: «In a power cut, use a torch, not a candle, keep the fridge closed, and never touch a fallen line; hospitals have generators that start automatically.», reached through the option's own match among the sentences about the question's things. What matched: the same action «use» (+2); the same thing acted on «torch» (+2). · [the question and its options parsed, with trees and pragmatics](https://md.mova.elamur.ai/free/en/corpora/questions/technology/32-power-stations-and-the-grid/t6/) ### Test 7 · ★ · wrong ✗ {#t7} Count them: a line of pylons has one pylon every 300 metres. How many gaps are there between 5 pylons in a row? - **1.** 5 — **← Mova's choice** · no support - **2.** 4 — **✓ the right answer** · no support - **3.** 3 — no support - **4.** 6 — no support **Why:** No option found support in what it remembers, so it guessed: it took the first option shown. · [the question and its options parsed, with trees and pragmatics](https://md.mova.elamur.ai/free/en/corpora/questions/technology/32-power-stations-and-the-grid/t7/) ### Test 8 · ★ · wrong ✗ {#t8} Count them: a power station has 3 turbines, and each one turns 1 generator. How many generators? - **1.** 9 — **← Mova's choice** · no support - **2.** 3 — **✓ the right answer** · no support - **3.** 1 — no support - **4.** 6 — no support **Why:** No option found support in what it remembers, so it guessed: it took the first option shown. · [the question and its options parsed, with trees and pragmatics](https://md.mova.elamur.ai/free/en/corpora/questions/technology/32-power-stations-and-the-grid/t8/) ### Test 9 · ★ · right ✓ {#t9} «nuclear power just burns uranium like coal, right» What is the best answer? - **1.** Yes, but uranium burns only at night — no support - **2.** No, uranium makes electricity directly with no steam — score 2 - **3.** No, uranium atoms split and give off heat, which makes steam — **← Mova's choice** · **✓ the right answer** · score 6 - **4.** Yes, uranium burns with a big flame — no support **Why:** It took the question to ask what it is done to. It chose option 3 with score 6, against 2 for the next best. Its support: lesson 32, line 15: «A coal power station burns coal to make steam and gives off a lot of carbon dioxide and smoke; the UK closed its last one, Ratcliffe-on-Soar, in 2024.», reached through a sentence linked to the one the question matched. What matched: it fills the role the question asks for (+3); the same action «make» (+2); the same thing acted on «steam» (+2). Against it: a different doer (counts against) (-1). · [the question and its options parsed, with trees and pragmatics](https://md.mova.elamur.ai/free/en/corpora/questions/technology/32-power-stations-and-the-grid/t9/) ### Test 10 · ★ · wrong ✗ {#t10} Why would a hydroelectric station pump water uphill at night when electricity is cheap? - **1.** To clean the water in the lake — **← Mova's choice** · score 5 - **2.** To stop the lake freezing over on the coldest winter nights of the year — score 2 - **3.** To make the dam heavier — score 2 - **4.** To let it run down through turbines later when more is needed — **✓ the right answer** · score 5 **Why:** It took the question to ask why something happens (its cause). It chose option 1 with score 5, tied with another option at 5 (the first shown, or the one claiming less beyond what it knows, wins). Its support: lesson 12, line 9: «A dishwasher's spinning arms squirt hot soapy water at the dishes; the water pushing out of the arms makes them spin, and it often uses less water than washing…», reached through the option's own match among the sentences about the question's things. What matched: the same thing acted on «less water» (+3); the same doer «water» (+2). The right option, 4, scored 5. · [the question and its options parsed, with trees and pragmatics](https://md.mova.elamur.ai/free/en/corpora/questions/technology/32-power-stations-and-the-grid/t10/) ### Test 11 · ★ · right ✓ {#t11} Why do engineers send electricity at high voltage over long lines but lower it before it reaches homes? - **1.** High voltage wastes less on the way but is far too strong for homes — **← Mova's choice** · **✓ the right answer** · score 7 - **2.** Low voltage travels faster on long lines — score 3 - **3.** High voltage is cheaper to use in homes — score 6 - **4.** Homes need more voltage than lines do — score 2 **Why:** It took the question to ask why something happens (its cause). It chose option 1 with score 7, against 6 for the next best. Its support: lesson 32, line 2: «The power station can be far away, so tall steel pylons carry the electricity across the country on wires at very high voltage, which wastes less on the way. N…», reached through the option's own match among the sentences about the question's things. What matched: the same action «waste» (+2); the same doer «high voltage» (+2); the same place «way» (+2); the same property (+1). · [the question and its options parsed, with trees and pragmatics](https://md.mova.elamur.ai/free/en/corpora/questions/technology/32-power-stations-and-the-grid/t11/) ### Exam question 1 · formal language · wrong ✗ {#e1} Identify the principal means by which the majority of electricity is generated in a power station. - **1.** The collection of lightning in suitable containers — **← Mova's choice** · no support - **2.** The rotation of a generator, in which magnets pass coils of wire, by means of a turbine — **✓ the right answer** · no support - **3.** The heating of metal plates until they emit electricity — no support - **4.** The direct conversion of coal into electricity without motion — no support **Why:** No option found support in what it remembers, so it guessed: it took the first option shown. · [the question and its options parsed, with trees and pragmatics](https://md.mova.elamur.ai/free/en/corpora/questions/technology/32-power-stations-and-the-grid/e1/) ### Exam question 2 · formal language · wrong ✗ {#e2} Select the response consistent with the established facts concerning the white plume emitted from a cooling tower. - **1.** It consists of smoke produced by combustion — **← Mova's choice** · no support - **2.** It consists of radioactive gas — no support - **3.** It consists of water vapour — **✓ the right answer** · no support - **4.** It consists of dust from the interior of the tower — no support **Why:** Nothing it remembers matched the question, so it guessed: it took the first option shown. · [the question and its options parsed, with trees and pragmatics](https://md.mova.elamur.ai/free/en/corpora/questions/technology/32-power-stations-and-the-grid/e2/) ### Exam question 3 · formal language · wrong ✗ {#e3} Ascertain the reason for which electricity is transmitted over long distances at a very high voltage. - **1.** The quantity of energy lost in transmission is thereby reduced — **✓ the right answer** · no support - **2.** Electricity of low voltage is incapable of ascending hills — **← Mova's choice** · score 3 - **3.** The weight of the conductors is thereby reduced — no support - **4.** Birds are thereby prevented from alighting upon the conductors — no support **Why:** It took the question to ask which statement is true. It chose option 2 with score 3, the only option with support. Its support: lesson 25, line 3: «Gears change how hard each turn of the pedals is. Going up the steep hill to school, you click to a bigger back cog: you pedal more turns, but each turn is eas…», reached through the option's own match among the sentences about the question's things. What matched: the same action «go up» (+2); the same thing acted on «steep hill» (+2). Against it: a different doer (counts against) (-1). The right option, 1, found no support in what it remembers. · [the question and its options parsed, with trees and pragmatics](https://md.mova.elamur.ai/free/en/corpora/questions/technology/32-power-stations-and-the-grid/e3/) ### Exam question 4 · formal language · wrong ✗ {#e4} Which of the following statements most accurately characterises the conduct required of a person during an interruption of the electricity supply? - **1.** Fallen lines are to be removed from the road — **← Mova's choice** · score 6 - **2.** A torch is to be used in preference to a candle, and fallen lines are not to be touched — **✓ the right answer** · no support - **3.** Candles are to be lit in every room — no support - **4.** The refrigerator is to be opened frequently — no support **Why:** It took the question to ask who or what does it. It chose option 1 with score 6, the only option with support. Its support: lesson 21, line 2: «Steel wheels on smooth steel rails roll with very little friction, the rubbing that slows things down. That is why one locomotive, the engine that pulls the tr…», reached through the same lesson line as the sentence the question matched. What matched: the same action «pull» (+4); the same thing acted on «whole line» (+2). The right option, 2, found no support in what it remembers. · [the question and its options parsed, with trees and pragmatics](https://md.mova.elamur.ai/free/en/corpora/questions/technology/32-power-stations-and-the-grid/e4/) - ← previous: [31. Roads and road signs](https://md.mova.elamur.ai/free/en/school-run/technology/31-roads-and-road-signs/) - next →: [33. Wind, sun and other clean energy](https://md.mova.elamur.ai/free/en/school-run/technology/33-wind-sun-and-other-clean-energy/) - ↑ back to [Technology](https://md.mova.elamur.ai/free/en/school-run/technology/)