---
title: Why does a hairdryer have a cut-out switch? — Washing, drying, vacuuming and ironing · tree and pragmatics
description: Why does a hairdryer have a cut-out switch? Test 9 · ★ 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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# Test 9 · ★ · Washing, drying, vacuuming and ironing

<!-- .ven lang=en -->
Why does a hairdryer have a cut-out switch?

<!-- .vintro -->
**Mova's choice:** option 4 · **The right answer:** option 4 · right ✓ · **Who acts:** hairdryer · **What happens:** have · **To what, where:** out switch

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This is test 9 · ★ of lesson 12 «Washing, drying, vacuuming and ironing» of the technology course of Mova's primary school. 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/#t9).

## The question {#question}

```conllu
# sent_id = question:technology:12-washing-drying-vacuuming-ironing:t9:1
# text = Why does a hairdryer have a cut-out switch?
1	Why	why	ADV	WRB	PronType=Int	5	advmod	_	_
2	does	do	AUX	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	5	aux	_	_
3	a	a	DET	DT	Definite=Ind|PronType=Art	4	det	_	_
4	hairdryer	hairdryer	NOUN	NN	Number=Sing	5	nsubj	_	_
5	have	have	VERB	VBP	Mood=Ind|Number=Plur|Person=3|Tense=Pres|VerbForm=Fin	0	root	_	_
6	a	a	DET	DT	Definite=Ind|PronType=Art	10	det	_	_
7	cut	cut	NOUN	NN	Number=Sing	9	compound	_	SpaceAfter=No
8	-	-	PUNCT	HYPH	_	7	punct	_	SpaceAfter=No
9	out	out	NOUN	NN	Number=Sing	10	compound	_	_
10	switch	switch	NOUN	NN	Number=Sing	5	obj	_	SpaceAfter=No
11	?	?	PUNCT	.	_	5	punct	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **have** | present · do-support | a hairdryer | a out switch |  |  |  |  | vn birth-28.2-1 «NP V NP»: agent=Agent switch=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 {#o1}

<!-- .ven lang=en -->
To make it louder

```conllu
# sent_id = question:technology:12-washing-drying-vacuuming-ironing:t9:o1:1
# text = To make it louder
1	To	to	PART	TO	_	2	mark	_	_
2	make	make	VERB	VB	Mood=Imp|VerbForm=Fin	0	root	_	_
3	it	it	PRON	PRP	Case=Acc|Gender=Neut|Number=Sing|Person=3|PronType=Prs	2	obj	_	_
4	louder	loud	ADJ	JJR	Degree=Cmp	2	xcomp	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **make** | to-infinitive |  | it |  |  |  | loud *property* | vn build-26.1-1 «NP.asset V NP»: agent=Asset it=Product |

### Option 2 {#o2}

<!-- .ven lang=en -->
To change the colour of the air

```conllu
# sent_id = question:technology:12-washing-drying-vacuuming-ironing:t9:o2:1
# text = To change the colour of the air
1	To	to	PART	TO	_	2	mark	_	_
2	change	change	VERB	VB	Mood=Imp|VerbForm=Fin	0	root	_	_
3	the	the	DET	DT	Definite=Def|PronType=Art	4	det	_	_
4	colour	colour	NOUN	NN	Number=Sing	2	obj	_	_
5	of	of	ADP	IN	_	7	case	_	_
6	the	the	DET	DT	Definite=Def|PronType=Art	7	det	_	_
7	air	air	NOUN	NN	Number=Sing	4	nmod	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **change** | to-infinitive |  | the colour of the air |  |  |  |  | vn dress-41.1.1-1-1 «NP V NP»: agent=Agent colour=Patient |

### Option 3 {#o3}

<!-- .ven lang=en -->
To save the battery

```conllu
# sent_id = question:technology:12-washing-drying-vacuuming-ironing:t9:o3:1
# text = To save the battery
1	To	to	PART	TO	_	2	mark	_	_
2	save	save	VERB	VB	Mood=Imp|VerbForm=Fin	0	root	_	_
3	the	the	DET	DT	Definite=Def|PronType=Art	4	det	_	_
4	battery	battery	NOUN	NN	Number=Sing	2	obj	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **save** | to-infinitive |  | the battery |  |  |  |  | vn get-13.5.1-1 «NP V NP»: agent=Agent battery=Theme |

### Option 4 · ← Mova's choice · ✓ the right answer {#o4}

<!-- .ven lang=en -->
To switch off if it gets too hot

```conllu
# sent_id = question:technology:12-washing-drying-vacuuming-ironing:t9:o4:1
# text = To switch off if it gets too hot
1	To	to	PART	TO	_	2	mark	_	_
2	switch	switch	VERB	VB	Mood=Imp|VerbForm=Fin	0	root	_	_
3	off	off	ADP	RP	_	2	compound:prt	_	_
4	if	if	SCONJ	IN	_	6	mark	_	_
5	it	it	PRON	PRP	Case=Nom|Gender=Neut|Number=Sing|Person=3|PronType=Prs	6	nsubj	_	_
6	gets	get	VERB	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	2	advcl	_	_
7	too	too	ADV	RB	_	8	advmod	_	_
8	hot	hot	ADJ	JJ	Degree=Pos	6	xcomp	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **switch off** | to-infinitive |  |  |  |  |  |  | vn convert-26.6.2-1-1 «NP V»: agent=Patient |
| 2 | **get** *a condition, not said to happen* | present | it |  |  |  |  | hot *property* | vn comprehend-87.2-1 «NP V S\_ING»: agent=Experiencer |

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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.

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