---
title: Identify the principal means by which the majority of electricity is… — Power stations and the grid · tree and pragmatics
description: Identify the principal means by which the majority of electricity is generated in a power station. Exam question 1 of lesson 32 «Power stations and the grid» of the technology course of Mova's primary school, with the dependency tree and pragmatics of the question and of each option; Mova's choice w
---

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# Exam question 1 · Power stations and the grid

<!-- .ven lang=en -->
Identify the principal means by which the majority of electricity is generated in a power station.

<!-- .vintro -->
**Mova's choice:** option 1 · **The right answer:** option 2 · wrong ✗ · **Who acts:** you, principal · **What happens:** identify, mean, generate · **To what, where:** majority, power station · **Speech:** someone speaks here

<!-- .vabout -->
This is exam question 1 of lesson 32 «Power stations and the grid» of the technology course of Mova's primary school, asked in stiff, formal language. The page gives the question's syntax tree — a dependency tree in the style of Universal Dependencies — and its pragmatics clause by clause, then the 4 options as the student saw them, each with its tree and pragmatics. Every text is parsed by Mova itself. How the student answered it, with the score of every option and why: [the test at school](https://md.mova.elamur.ai/free/en/school-run/technology/32-power-stations-and-the-grid/#e1).

## The question {#question}

```conllu
# sent_id = question:technology:32-power-stations-and-the-grid:e1:1
# text = Identify the principal means by which the majority of electricity is generated in a power station.
1	Identify	identify	VERB	VB	Mood=Imp|VerbForm=Fin	0	root	_	_
2	the	the	DET	DT	Definite=Def|PronType=Art	3	det	_	_
3	principal	principal	NOUN	NN	Number=Sing	4	nsubj	_	_
4	means	mean	VERB	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	1	ccomp	_	_
5	by	by	ADP	IN	_	6	case	_	_
6	which	which	PRON	WDT	PronType=Rel	12	obl	_	_
7	the	the	DET	DT	Definite=Def|PronType=Art	8	det	_	_
8	majority	majority	NOUN	NN	Number=Sing	12	nsubj:pass	_	_
9	of	of	ADP	IN	_	10	case	_	_
10	electricity	electricity	NOUN	NN	Number=Sing	8	nmod	_	_
11	is	be	AUX	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	12	aux:pass	_	_
12	generated	generate	VERB	VBN	Tense=Past|VerbForm=Part|Voice=Pass	4	ccomp	_	_
13	in	in	ADP	IN	_	16	case	_	_
14	a	a	DET	DT	Definite=Ind|PronType=Art	16	det	_	_
15	power	power	NOUN	NN	Number=Sing	16	compound	_	_
16	station	station	NOUN	NN	Number=Sing	12	obl	_	SpaceAfter=No
17	.	.	PUNCT	.	_	1	punct	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **identify** | imperative | you *not said here* |  |  |  |  |  | vn characterize-29.2-1-1 «NP V S\_ING»: agent=Agent clause=Theme |
| 2 | **mean** | present | the principal |  |  |  |  |  | vn intend-61.2-1 «NP V S»: agent=Agent clause=Topic |
| 3 | **generate** | present · passive |  | the majority of electricity |  | a power station |  |  | vn birth-28.2-1 «NP V NP»: subject=Patient |

<!-- .note -->
One row per clause the reader finds. «not said here»: a role filled from the clause above. «roles by»: a VerbNet class and frame when one fits the verb, else the reader's rules on the tree.

## The options {#options}

### Option 1 · ← Mova's choice {#o1}

<!-- .ven lang=en -->
The collection of lightning in suitable containers

```conllu
# sent_id = question:technology:32-power-stations-and-the-grid:e1:o1:1
# text = The collection of lightning in suitable containers
1	The	the	DET	DT	Definite=Def|PronType=Art	2	det	_	_
2	collection	collection	NOUN	NN	Number=Sing	0	root	_	_
3	of	of	ADP	IN	_	4	case	_	_
4	lightning	lightning	NOUN	NN	Number=Sing	2	nmod	_	_
5	in	in	ADP	IN	_	7	case	_	_
6	suitable	suitable	ADJ	JJ	Degree=Pos	7	amod	_	_
7	containers	container	NOUN	NNS	Number=Plur	2	nmod	_	_
```

<!-- .note -->
The frames reader finds no event or fact in this sentence.

### Option 2 · ✓ the right answer {#o2}

<!-- .ven lang=en -->
The rotation of a generator, in which magnets pass coils of wire, by means of a turbine

<!-- fold The tree, 17 words -->
```conllu
# sent_id = question:technology:32-power-stations-and-the-grid:e1:o2:1
# text = The rotation of a generator, in which magnets pass coils of wire, by means of a turbine
1	The	the	DET	DT	Definite=Def|PronType=Art	2	det	_	_
2	rotation	rotation	NOUN	NN	Number=Sing	10	nsubj	_	_
3	of	of	ADP	IN	_	5	case	_	_
4	a	a	DET	DT	Definite=Ind|PronType=Art	5	det	_	_
5	generator	generator	NOUN	NN	Number=Sing	2	nmod	_	SpaceAfter=No
6	,	,	PUNCT	,	_	10	punct	_	_
7	in	in	ADP	IN	_	8	case	_	_
8	which	which	PRON	WDT	PronType=Rel	10	obl	_	_
9	magnets	magnet	NOUN	NNS	Number=Plur	10	nsubj	_	_
10	pass	pass	VERB	VBP	Mood=Ind|Number=Plur|Person=3|Tense=Pres|VerbForm=Fin	0	root	_	_
11	coils	coil	NOUN	NNS	Number=Plur	10	obj	_	_
12	of	of	ADP	IN	_	13	case	_	_
13	wire	wire	NOUN	NN	Number=Sing	11	nmod	_	SpaceAfter=No
14	,	,	PUNCT	,	_	16	punct	_	_
15	by	by	ADP	IN	_	16	case	_	_
16	means	mean	VERB	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	10	parataxis	_	_
17	of	of	ADP	IN	_	19	case	_	_
18	a	a	DET	DT	Definite=Ind|PronType=Art	19	det	_	_
19	turbine	turbine	NOUN	NN	Number=Sing	16	obl	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **pass** | present | the rotation of a generator | coils of wire |  |  |  |  | vn throw-17.1-1 «NP V NP PP.destinations»: agent=Agent coil=Theme in which=Destination |
| 2 | **mean** | present |  |  |  |  |  | of a turbine | vn intend-61.2-1 «NP V S»: agent=Agent |
| 3 | **rotate** |  | a generator |  |  |  |  |  | nom rotation «act intransitive»: of=agent |

### Option 3 {#o3}

<!-- .ven lang=en -->
The heating of metal plates until they emit electricity

```conllu
# sent_id = question:technology:32-power-stations-and-the-grid:e1:o3:1
# text = The heating of metal plates until they emit electricity
1	The	the	DET	DT	Definite=Def|PronType=Art	2	det	_	_
2	heating	heating	NOUN	NN	Number=Sing	8	nsubj	_	_
3	of	of	ADP	IN	_	5	case	_	_
4	metal	metal	NOUN	NN	Number=Sing	5	compound	_	_
5	plates	plate	NOUN	NNS	Number=Plur	2	nmod	_	_
6	until	until	SCONJ	IN	_	8	mark	_	_
7	they	they	PRON	PRP	Case=Nom|Number=Plur|Person=3|PronType=Prs	8	nsubj	_	_
8	emit	emit	VERB	VBP	Mood=Ind|Number=Plur|Person=3|Tense=Pres|VerbForm=Fin	0	root	_	_
9	electricity	electricity	NOUN	NN	Number=Sing	8	obj	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **emit** | present | the heating of metal plates | electricity |  |  |  |  | vn substance\_emission-43.4 «NP V NP»: agent=Source electricity=Theme |
| 2 | **heat** |  | metal plates |  |  |  |  |  | nom heating «process intransitive»: of=agent |

### Option 4 {#o4}

<!-- .ven lang=en -->
The direct conversion of coal into electricity without motion

```conllu
# sent_id = question:technology:32-power-stations-and-the-grid:e1:o4:1
# text = The direct conversion of coal into electricity without motion
1	The	the	DET	DT	Definite=Def|PronType=Art	3	det	_	_
2	direct	direct	ADJ	JJ	Degree=Pos	3	amod	_	_
3	conversion	conversion	NOUN	NN	Number=Sing	0	root	_	_
4	of	of	ADP	IN	_	5	case	_	_
5	coal	coal	NOUN	NN	Number=Sing	3	nmod	_	_
6	into	into	ADP	IN	_	7	case	_	_
7	electricity	electricity	NOUN	NN	Number=Sing	3	nmod	_	_
8	without	without	ADP	IN	_	9	case	_	_
9	motion	motion	NOUN	NN	Number=Sing	3	nmod	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **convert** |  |  | coal |  | electricity |  | without motion | nom conversion «event transitive»: of=patient into=place without=obl |

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**Text:** the tests of Mova's primary school, written for Mova (`world/data/school/`), as the course runner gave them to the student. **Trees:** Mova's own parse — the `en` model on the CPU, when the site is built — not checked by a teacher; they may be wrong. **Frames:** Mova's frames reader (`prag`), each text read on its own. Elamur Cosmic License.

<!-- /div -->

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- ← previous: [Power stations and the grid, test 11](https://md.mova.elamur.ai/free/en/corpora/questions/technology/32-power-stations-and-the-grid/t11/)
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