Inside a car: engine, gears and the dashboard

Tests: 7 of 11 right · Exam: 1 of 4 right · Kind: plain · Understood: 8 of 15 · Run: 2026-10-18, commit f3c23ea72

Lesson 17 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 · wrong ✗

my uncle says when the oil light comes on just ignore it till next week. good idea?

1. Yes, the lights are only decoration — ← Mova's choice · no support
2. No, warning lights mean something should be checked soon — ✓ the right answer · no support
3. Yes, they always come on for no reason at all, every single week — no support
4. No, you should break the bulb — 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 2 · wrong ✗

In a cartoon a kid crawls under a car lifted on a ramp to look. What's the real rule?

1. It's fine with a torch — ← Mova's choice · no support
2. Never go under a raised car — ✓ the right answer · no support
3. It's fine if you're quick — no support
4. It's fine if the engine is off — 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 3 · right ✓

Jake reckons the car moves because the engine pushes the road. Right?

1. No, burning fuel pushes pistons that turn the wheels — ← Mova's choice · ✓ the right answer · no support
2. Yes, the engine has a long leg — no support
3. No, the steering wheel moves it — no support
4. Yes, the exhaust pushes hard on the road behind and shoves the car on — 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 4 · right ✓

wipers came on by themselves, is the car haunted lol?

1. Yes, cars can't do that alone — no support
2. No, a rain sensor switched them on — ← Mova's choice · ✓ the right answer · score 6
3. Yes, the radio did it — no support
4. No, the driver's foot pressed them — no support

Why: It took the question to ask which statement is true. It chose option 2 with score 6, the only option with support. Its support: lesson 17, line 17: «Some cars have a rain sensor that shines invisible light at the windscreen and switches the wipers on when raindrops change the reflection.», reached through the same lesson line as the sentence the question matched. What matched: the same action «switch on» (+2); the same doer «rain sensor» (+2); the same thing acted on «wipers» (+2). · the question and its options parsed, with trees and pragmatics

Test 5 · right ✓

What would happen on a wet road with tyres worn smooth?

1. The tyres would fill up with rainwater and the car would float away — no support
2. Nothing, tread doesn't matter — no support
3. The car would grip badly and take longer to stop — ← Mova's choice · ✓ the right answer · score 14
4. It would grip better than new tyres — no support

Why: It took the question to ask which statement is true. It chose option 3 with score 14, the only option with support. 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 the remembered sentence the question matched. What matched: the same action «need» (+4); the same doer «cars» (+4); its «because» matches the remembered cause (+4); the same property (+2). · the question and its options parsed, with trees and pragmatics

Test 6 · right ✓

Why do bikes and cars both have gears?

1. Gears are only for racing — no support
2. To make them look complicated — score 0
3. To make the chain longer — no support
4. Low gears help start and climb, high gears go fast easily — ← Mova's choice · ✓ the right answer · score 5

Why: It took the question to ask why something happens (its cause). It chose option 4 with score 5, against 0 for the next best. Its support: lesson 17, line 7: «Low gears give more turning force to start and climb; high gears let the wheels turn fast while the engine turns slowly; electric cars often need only one gear…», reached through the same lesson line as the sentence the question matched. What matched: the same action «start» (+3); the same doer «low gears» (+2). · the question and its options parsed, with trees and pragmatics

Test 7 · right ✓

shut up and get out the car, I'm doing the petrol. Where do you wait?

1. Under the pump, where it's cool in the shade — no support
2. Next to the nozzle to help — no support
3. On your phone by the pump — no support
4. Away from the pumps, or in the car — ← Mova's choice · ✓ the right answer · score 4

Why: It took the question to ask where. It chose option 4 with score 4, the only option with support. Its support: lesson 17, line 5: «Engines and exhausts get very hot and cars are heavy, so children stay away from under the bonnet, from behind a running car and from under a raised car.», reached through the option's own match among the sentences about the question's things. What matched: it fills the role the question asks for (+3); the same place «running car» (+2); the same property (+1). Against it: a different action (counts against) (-1); a different doer (counts against) (-1). · the question and its options parsed, with trees and pragmatics

Test 8 · wrong ✗

A car in front has a white light on at the back. What does it mean?

1. It is parked there for ever — score 5
2. It wants to turn left next — ← Mova's choice · score 7
3. It is about to brake hard — no support
4. It is about to reverse — ✓ the right answer · score 7

Why: It took the question to ask what it is done to. It chose option 2 with score 7, tied with another option at 7 (the first shown, or the one claiming less beyond what it knows, wins). 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 the option's own match among the sentences about the question's things. What matched: the same action «need» (+4); the same doer «cars» (+3). The right option, 4, scored 7. · the question and its options parsed, with trees and pragmatics

Test 9 · wrong ✗

Which is true about a car engine?

1. It runs on water from the windscreen washer bottle — ← Mova's choice · no support
2. It is cold inside while running — no support
3. Many small explosions happen inside it every second — ✓ the right answer · no support
4. It only works when it rains — 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 10 · right ✓

Some cars drip water from the exhaust pipe on a cold morning. Is the car broken?

1. Yes, the engine is full of rain — no support
2. Usually not; burning fuel makes water vapour that cools to drops — ← Mova's choice · ✓ the right answer · score 4
3. Yes, the exhaust is leaking petrol — no support
4. No, someone poured water in it — 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 17, line 8: «Burnt gases leave through the exhaust pipe, and a catalytic converter changes some poisonous gases into less harmful ones; exhaust fumes include invisible carb…», reached through the option's own match among the sentences about the question's things. What matched: the same action «cool» (+2); the same doer «water vapour» (+2). · the question and its options parsed, with trees and pragmatics

Test 11 · right ✓

Leo wants to stand behind the car to wave while Dad starts it. What's the rule?

1. It's fine if you wave a lot — no support
2. Only stand in front of it — no support
3. Never stand behind a car with its engine running — ← Mova's choice · ✓ the right answer · score 7
4. It's fine if the car is small and the driver is your own dad — no support

Why: It took the question to ask what it is done to. It chose option 3 with score 7, the only option with support. Its support: lesson 17, line 9: «Never stand behind a car with its engine running, and never run an engine in a closed garage.», reached through the option's own match among the sentences about the question's things. What matched: the same action «stand» (+4); the same place «car» (+3). · the question and its options parsed, with trees and pragmatics

Exam question 1 · formal language · wrong ✗

Identify the principal function of the low gears of a motor vehicle.

1. The reduction of fuel consumption on motorways — ← Mova's choice · no support
2. The prevention of the vehicle rolling backwards — no support
3. The provision of greater turning force for starting and climbing — ✓ the right answer · no support
4. The attainment of the highest possible road speed — 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

Exam question 2 · formal language · wrong ✗

It is given that all warning lamps of a dashboard illuminate momentarily upon starting. State the reason therefor.

1. To indicate that every system of the vehicle has failed — ← Mova's choice · no support
2. To heat the instrument panel — no support
3. To summon the attention of a mechanic — no support
4. To demonstrate that the lamps are functional — ✓ 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

Exam question 3 · formal language · right ✓

Which of the following statements most accurately characterises the purpose of the tread grooves of a tyre?

1. They reduce the mass of the tyre — no support
2. They displace water so that the rubber may grip the road — ← Mova's choice · ✓ the right answer · score 9
3. They prevent the tyre from rotating — no support
4. They generate an agreeable sound — no support

Why: It took the question to ask who or what does it. It chose option 2 with score 9, the only option with support. 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: it fills the role the question asks for (+3); the same action «grip» (+2); the same doer «rubber» (+2); its «because» matches the remembered cause (+2). · the question and its options parsed, with trees and pragmatics

Exam question 4 · formal language · wrong ✗

Select the response consistent with the established facts concerning the operation of an engine within an enclosed garage.

1. It is safe provided the lights are on — ← Mova's choice · no support
2. It is dangerous owing to invisible carbon monoxide — ✓ the right answer · no support
3. It is required for the engine to warm — no support
4. It is harmless for vehicles with diesel engines of recent manufacture — 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

This page in Markdown → https://md.mova.elamur.ai/free/en/school-run/technology/17-inside-a-car/