---
title: Identify the principle by which a domestic vacuum cleaner collects d… — Washing, drying, vacuuming and ironing · tree and pragmatics
description: Identify the principle by which a domestic vacuum cleaner collects dust. Exam question 1 of lesson 12 «Washing, drying, vacuuming and ironing» 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 was right.
---

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# Exam question 1 · Washing, drying, vacuuming and ironing

<!-- .ven lang=en -->
Identify the principle by which a domestic vacuum cleaner collects dust.

<!-- .vintro -->
**Mova's choice:** option 1 · **The right answer:** option 1 · right ✓ · **Who acts:** you, domestic vacuum cleaner · **What happens:** identify, collect · **To what, where:** principle, dust

<!-- .vabout -->
This is exam question 1 of lesson 12 «Washing, drying, vacuuming and ironing» 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/12-washing-drying-vacuuming-ironing/#e1).

## The question {#question}

```conllu
# sent_id = question:technology:12-washing-drying-vacuuming-ironing:e1:1
# text = Identify the principle by which a domestic vacuum cleaner collects dust.
1	Identify	identify	VERB	VB	Mood=Imp|VerbForm=Fin	0	root	_	_
2	the	the	DET	DT	Definite=Def|PronType=Art	3	det	_	_
3	principle	principle	NOUN	NN	Number=Sing	1	obj	_	_
4	by	by	ADP	IN	_	5	case	_	_
5	which	which	PRON	WDT	PronType=Rel	10	obl	_	_
6	a	a	DET	DT	Definite=Ind|PronType=Art	9	det	_	_
7	domestic	domestic	ADJ	JJ	Degree=Pos	9	amod	_	_
8	vacuum	vacuum	NOUN	NN	Number=Sing	9	compound	_	_
9	cleaner	cleaner	NOUN	NN	Number=Sing	10	nsubj	_	_
10	collects	collect	VERB	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	1	parataxis	_	_
11	dust	dust	NOUN	NN	Number=Sing	10	obj	_	SpaceAfter=No
12	.	.	PUNCT	.	_	1	punct	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **identify** | imperative | you *not said here* | the principle |  |  |  |  | vn characterize-29.2-1-1 «NP V NP S\_ING»: agent=Agent principle=Theme |
| 2 | **collect** | present | a domestic vacuum cleaner | dust |  |  |  |  | vn obtain-13.5.2 «NP V NP»: agent=Agent dust=Theme |

<!-- .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 · ✓ the right answer {#o1}

<!-- .ven lang=en -->
Air at greater external pressure flows into a region of reduced pressure

```conllu
# sent_id = question:technology:12-washing-drying-vacuuming-ironing:e1:o1:1
# text = Air at greater external pressure flows into a region of reduced pressure
1	Air	air	NOUN	NN	Number=Sing	6	nsubj	_	_
2	at	at	ADP	IN	_	5	case	_	_
3	greater	great	ADJ	JJR	Degree=Cmp	5	amod	_	_
4	external	external	ADJ	JJ	Degree=Pos	5	amod	_	_
5	pressure	pressure	NOUN	NN	Number=Sing	1	nmod	_	_
6	flows	flow	VERB	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	0	root	_	_
7	into	into	ADP	IN	_	9	case	_	_
8	a	a	DET	DT	Definite=Ind|PronType=Art	9	det	_	_
9	region	region	NOUN	NN	Number=Sing	6	obl	_	_
10	of	of	ADP	IN	_	12	case	_	_
11	reduced	reduce	VERB	VBN	Tense=Past|VerbForm=Part|Voice=Pass	12	amod	_	_
12	pressure	pressure	NOUN	NN	Number=Sing	9	nmod	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **flow** | present | Air at greater external pressure |  |  | a region of reduced pressure |  |  | vn appear-48.1.1 «NP V»: agent=Theme |
| 2 | **reduce** | participle |  |  |  |  |  |  | vn limit-76 «NP V NP»: agent=Causer |

### Option 2 {#o2}

<!-- .ven lang=en -->
Rotating brushes propel dust into a sealed compartment

```conllu
# sent_id = question:technology:12-washing-drying-vacuuming-ironing:e1:o2:1
# text = Rotating brushes propel dust into a sealed compartment
1	Rotating	rotate	VERB	VBG	VerbForm=Ger	2	amod	_	_
2	brushes	brush	NOUN	NNS	Number=Plur	3	nsubj	_	_
3	propel	propel	VERB	VBP	Mood=Ind|Number=Plur|Person=3|Tense=Pres|VerbForm=Fin	0	root	_	_
4	dust	dust	NOUN	NN	Number=Sing	3	obj	_	_
5	into	into	ADP	IN	_	8	case	_	_
6	a	a	DET	DT	Definite=Ind|PronType=Art	8	det	_	_
7	sealed	seal	VERB	VBN	Tense=Past|VerbForm=Part|Voice=Pass	8	amod	_	_
8	compartment	compartment	NOUN	NN	Number=Sing	3	obl	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **rotate** | gerund |  |  |  |  |  |  | vn modes\_of\_being\_with\_motion-47.3 «NP V»: agent=Theme |
| 2 | **propel** | present | Rotating brushes | dust |  | a sealed compartment |  |  | tree rules |
| 3 | **seal** | participle |  |  |  |  |  |  | vn tape-22.4 «NP V ADV-Middle»: agent=Patient |

### Option 3 {#o3}

<!-- .ven lang=en -->
A magnetic field attracts particles of dust

```conllu
# sent_id = question:technology:12-washing-drying-vacuuming-ironing:e1:o3:1
# text = A magnetic field attracts particles of dust
1	A	a	DET	DT	Definite=Ind|PronType=Art	3	det	_	_
2	magnetic	magnetic	ADJ	JJ	Degree=Pos	3	amod	_	_
3	field	field	NOUN	NN	Number=Sing	4	nsubj	_	_
4	attracts	attract	VERB	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	0	root	_	_
5	particles	particle	NOUN	NNS	Number=Plur	4	obj	_	_
6	of	of	ADP	IN	_	7	case	_	_
7	dust	dust	NOUN	NN	Number=Sing	5	nmod	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **attract** | present | a magnetic field | particles of dust |  |  |  |  | vn lure-59.3 «NP V NP»: agent=Agent particle=Patient |

### Option 4 {#o4}

<!-- .ven lang=en -->
Static charge causes dust to adhere to the hose

```conllu
# sent_id = question:technology:12-washing-drying-vacuuming-ironing:e1:o4:1
# text = Static charge causes dust to adhere to the hose
1	Static	static	ADJ	JJ	Degree=Pos	2	amod	_	_
2	charge	charge	NOUN	NN	Number=Sing	3	nsubj	_	_
3	causes	cause	VERB	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	0	root	_	_
4	dust	dust	NOUN	NN	Number=Sing	3	obj	_	_
5	to	to	PART	TO	_	6	mark	_	_
6	adhere	adhere	VERB	VB	VerbForm=Inf	3	xcomp	_	_
7	to	to	ADP	IN	_	9	case	_	_
8	the	the	DET	DT	Definite=Def|PronType=Art	9	det	_	_
9	hose	hose	NOUN	NN	Number=Sing	6	obl	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **cause** | present | Static charge | dust |  |  |  |  | tree rules |
| 2 | **adhere** | to-infinitive | dust *not said here* |  |  |  |  | to the hose | vn cling-22.5 «NP V PP.co-theme»: agent=Theme to hose=Co-Theme |

<!-- div src -->

**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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