Electric cars and charging

Tests: 5 of 11 right · Exam: 3 of 4 right · Kind: ★★★ · Understood: 8 of 15 · Run: 2026-10-18, commit f3c23ea72

Lesson 19 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.

Every question of this lesson and each of its options parsed by Mova, with trees and pragmatics: the lesson's questions in the corpora.

Test 1 · ★★★ · right ✓

my dad says electric cars are silent so no need to look, just listen. Right?

1. Yes, you'll always hear them a long way off, they roar — no support
2. No, but only at night — no support
3. Yes, they always beep at you — no support
4. No, look as well as listen; they can be very quiet — ← Mova's choice · ✓ the right answer · score 4

Why: It took the question to ask which statement is true. It chose option 4 with score 4, the only option with support. Its support: lesson 19, line 7: «Electric cars are very quiet, so new ones must make a gentle sound at low speed so people can hear them coming.», reached through the option's own match among the sentences about the question's things. What matched: the same doer «electric cars» (+2); the same property (+1); the same light verb (be, have, do, get, go) (+1). · the question and its options parsed, with trees and pragmatics

Test 2 · ★★★ · wrong ✗

What would happen to an electric car's range on a freezing day with the heater on full?

1. It would charge itself from the cold — no support
2. It would go much further — ← Mova's choice · score 6
3. It would go less far on one charge — ✓ the right answer · score 6
4. Nothing would change — no support

Why: It took the question to ask which statement is true. It chose option 2 with score 6, tied with another option at 6 (the first shown, or the one claiming less beyond what it knows, wins). Its support: lesson 19, line 18: «The range is how far an electric car can go on one charge; it depends on battery size, speed, weather and heating, and cold weather shortens it, because batter…», reached through the remembered sentence the question matched. What matched: the same doer «range» (+4); the same property (+2). The right option, 3, scored 6. · the question and its options parsed, with trees and pragmatics

Test 3 · ★★★ · right ✓

oi, can I swing on the charging cable while the car charges?

1. Yes, if you hold the plug end tight and don't swing too high — no support
2. Yes, it's just a rope — no support
3. No, but you can pull the plug out — no support
4. No, never play with charging cables or plugs — ← Mova's choice · ✓ the right answer · score 4

Why: It took the question to ask which statement is true. It chose option 4 with score 4, the only option with support. Its support: lesson 19, line 5: «Batteries hold a lot of energy, so the rules are simple: don't play with charging cables, and tell an adult about any battery that is damaged, hot or smells.», reached through the option's own match among the sentences about the question's things. What matched: the same action «play» (+2); the same circumstance (+2). · the question and its options parsed, with trees and pragmatics

Test 4 · ★★★ · wrong ✗

Mia's friend got a private e-scooter for her birthday and rides it on the street. Is that allowed in the UK?

1. No, only on motorways — ← Mova's choice · no support
2. Yes, if she rides fast — no support
3. Yes, it is legal for under-tens, as long as a grown-up is watching — no support
4. No, private e-scooters are illegal on public roads — ✓ the right answer · 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

Test 5 · ★★★ · wrong ✗

A car slows down without the driver touching the brake pedal, and the battery number goes up. What happened?

1. The battery magically refilled — ← Mova's choice · no support
2. The car found a hidden charger — no support
3. The driver turned the radio off — no support
4. Regenerative braking turned movement back into electricity — ✓ the right answer · 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

Test 6 · ★★★ · wrong ✗

Which car makes nothing but water from its exhaust?

1. An old steam train — no support
2. A brand-new diesel car — ← Mova's choice · score 6
3. A small petrol car — score 6
4. A hydrogen fuel cell car — ✓ the right answer · score 6

Why: It took the question to ask who or what does it. It chose option 2 with score 6, tied with another option at 6 (the first shown, or the one claiming less beyond what it knows, wins). Its support: lesson 19, line 10: «In regenerative braking the motor works backwards as a generator, a machine that makes electricity, when the car slows, putting some energy back into the batte…», reached through the same lesson line as the sentence the question matched. What matched: it fills the role the question asks for (+4); the same doer «electric cars» (+3). Against it: a different action (counts against) (-1). The right option, 4, scored 6. · the question and its options parsed, with trees and pragmatics

Test 7 · ★★★ · right ✓

Jake looks under the bonnet of an electric car and finds space for a bag. Why?

1. There is no engine there, so some have a frunk — ← Mova's choice · ✓ the right answer · no support
2. The battery has fallen out — no support
3. The engine is hidden in the bag — no support
4. It is where the petrol goes in for the small engine that starts the car — 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

Test 8 · ★★★ · wrong ✗

Ruby reckons an electric car stops at the petrol station. Right?

1. Yes, it needs a little petrol to start — ← Mova's choice · score 6
2. No, it charges at a charging point — ✓ the right answer · no support
3. Yes, it fills its tyres with fuel — score 3
4. No, it never needs any energy — score 3

Why: It took the question to ask which statement is true. It chose option 1 with score 6, against 3 for the next best. Its support: lesson 17, line 18: «The grooves in a tyre's tread push water away so the rubber can grip; the UK minimum tread depth for cars is 1.6 millimetres, and on wet roads cars need much l…», reached through a sentence linked to the one the question matched. What matched: the same action «need» (+2); the same doer «cars» (+2); its «because» matches the remembered cause (+2). The right option, 2, found no support in what it remembers. · the question and its options parsed, with trees and pragmatics

Test 9 · ★★★ · right ✓

An e-bike battery in the hall is hot and smells strange. What do you do?

1. Wrap it up tight in a thick wool blanket — no support
2. Keep away and tell an adult at once — ← Mova's choice · ✓ the right answer · score 5
3. Charge it again to fix it, then check it — score 5
4. Put it in the bath to cool it down quickly — no support

Why: It took the question to ask what is done. It chose option 2 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 19, line 5: «Batteries hold a lot of energy, so the rules are simple: don't play with charging cables, and tell an adult about any battery that is damaged, hot or smells.», reached through the option's own match among the sentences about the question's things. What matched: the same receiver «adult» (+2); it fills the role the question asks for (+2); the same action «tell» (+1). · the question and its options parsed, with trees and pragmatics

Test 10 · ★★★ · right ✓

In a cartoon an electric car's battery lasts for ever without charging. What's true?

1. It charges from sunshine through the roof only — no support
2. It must be charged; its range runs out — ← Mova's choice · ✓ the right answer · score 4
3. It runs on air once the battery is flat — no support
4. Batteries never empty — no support

Why: It took the question to ask which statement is true. It chose option 2 with score 4, the only option with support. Its support: lesson 7, line 15: «Rechargeable toy batteries should be charged on a hard surface with an adult around.», reached through the option's own match among the sentences about the question's things. What matched: the same action «charge» (+2); the same thing acted on «rechargeable toy batteries» (+2). · the question and its options parsed, with trees and pragmatics

Test 11 · ★★★ · wrong ✗

A hybrid glides past the school silently, then the engine starts on the hill. Why?

1. The engine was asleep — ← Mova's choice · no support
2. The hill switched it on — no support
3. It used the electric motor, then the petrol engine for more power — ✓ the right answer · no support
4. The driver honked by mistake — 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

Exam question 1 · formal language · right ✓

Identify the principle by which an electric vehicle recovers energy during deceleration.

1. The vehicle draws energy from overhead cables — no support
2. The tyres collect static electricity from the road — no support
3. The motor operates as a generator and recharges the battery — ← Mova's choice · ✓ the right answer · score 6
4. The brake pads convert friction into stored fuel — no support

Why: It took the question to ask which statement is true. It chose option 3 with score 6, the only option with support. Its support: lesson 19, line 10: «In regenerative braking the motor works backwards as a generator, a machine that makes electricity, when the car slows, putting some energy back into the batte…», reached through the same lesson line as the sentence the question matched. What matched: the same action «work» (+2); the same doer «motor» (+2); the same circumstance (+2). · the question and its options parsed, with trees and pragmatics

Exam question 2 · formal language · right ✓

It is given that an electric vehicle is driven in freezing conditions with cabin heating in use. Ascertain the effect upon its range.

1. The range is reduced — ← Mova's choice · ✓ the right answer · no support
2. The range is unaffected — no support
3. The range becomes unlimited — no support
4. The range is increased — 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

Exam question 3 · formal language · wrong ✗

Which of the following statements most accurately characterises the legal position of privately owned electric scooters in the United Kingdom?

1. Their use is lawful for children under twelve when accompanied by a parent — ← Mova's choice · no support
2. Their use is lawful upon pavements only — no support
3. Their use upon public roads and pavements is unlawful — ✓ the right answer · no support
4. Their use is lawful for all persons on all roads — 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

Exam question 4 · formal language · right ✓

Select the response consistent with the established facts concerning the emissions of a hydrogen fuel cell vehicle.

1. Water is the sole product emitted — ← Mova's choice · ✓ the right answer · no support
2. Carbon monoxide is emitted in quantity — no support
3. Black smoke is emitted continuously — no support
4. Petrol vapour is emitted whilst at idle — 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

This page in Markdown → https://md.mova.elamur.ai/free/en/school-run/technology/19-electric-cars-and-charging/