---
title: Why do people put oil on a squeaky bicycle chain? — Forces — pushes, pulls, friction and m… · tree and pragmatics
description: Why do people put oil on a squeaky bicycle chain? Test 6 of lesson 51 «Forces — pushes, pulls, friction and magnets» of the world course of Mova's primary school, with the dependency tree and pragmatics of the question and of each option; Mova's choice was right.
---

<!-- md -->
[Mova](https://md.mova.elamur.ai/free/en/) · [this page in HTML](https://mova.elamur.ai/free/en/corpora/questions/world/51-forces/t6/)

<!-- crumbs -->
[home](https://md.mova.elamur.ai/free/en/) / [corpora](https://md.mova.elamur.ai/free/en/corpora/) / [questions](https://md.mova.elamur.ai/free/en/corpora/questions/) / [World](https://md.mova.elamur.ai/free/en/corpora/questions/world/) / [Forces — pushes, pulls, friction and m…](https://md.mova.elamur.ai/free/en/corpora/questions/world/51-forces/) / t6

# Test 6 · Forces — pushes, pulls, friction and magnets

<!-- .ven lang=en -->
Why do people put oil on a squeaky bicycle chain?

<!-- .vintro -->
**Mova's choice:** option 4 · **The right answer:** option 4 · right ✓ · **Who acts:** people · **What happens:** put · **To what, where:** oil, squeaky bicycle chain

<!-- .vabout -->
This is test 6 of lesson 51 «Forces — pushes, pulls, friction and magnets» of the world 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/world/51-forces/#t6).

## The question {#question}

```conllu
# sent_id = question:world:51-forces:t6:1
# text = Why do people put oil on a squeaky bicycle chain?
1	Why	why	ADV	WRB	PronType=Int	4	advmod	_	_
2	do	do	AUX	VBP	Mood=Ind|Number=Plur|Person=3|Tense=Pres|VerbForm=Fin	4	aux	_	_
3	people	people	NOUN	NNS	Number=Plur	4	nsubj	_	_
4	put	put	VERB	VB	VerbForm=Inf	0	root	_	_
5	oil	oil	NOUN	NN	Number=Sing	4	obj	_	_
6	on	on	ADP	IN	_	10	case	_	_
7	a	a	DET	DT	Definite=Ind|PronType=Art	10	det	_	_
8	squeaky	squeaky	ADJ	JJ	Degree=Pos	10	amod	_	_
9	bicycle	bicycle	NOUN	NN	Number=Sing	10	compound	_	_
10	chain	chain	NOUN	NN	Number=Sing	4	obl	_	SpaceAfter=No
11	?	?	PUNCT	.	_	4	punct	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **put** | present · do-support | people | oil |  | a squeaky bicycle chain |  |  | vn put-9.1-2 «NP V PP.destination NP»: agent=Agent oil=Theme on chain=Destination |

<!-- .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 -->
Oil increases the grip of the chain

```conllu
# sent_id = question:world:51-forces:t6:o1:1
# text = Oil increases the grip of the chain
1	Oil	oil	NOUN	NN	Number=Sing	2	nsubj	_	_
2	increases	increase	VERB	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	0	root	_	_
3	the	the	DET	DT	Definite=Def|PronType=Art	4	det	_	_
4	grip	grip	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	chain	chain	NOUN	NN	Number=Sing	4	nmod	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **increase** | present | Oil | the grip of the chain |  |  |  |  | vn caused\_calibratable\_cos-45.6.2-1 «NP V NP.patient»: agent=Causer grip=Patient |
| 2 | **grip** |  |  | the chain |  |  |  |  | nom grip «act transitive»: of=patient |

### Option 2 {#o2}

<!-- .ven lang=en -->
Oil makes the metal magnetic

```conllu
# sent_id = question:world:51-forces:t6:o2:1
# text = Oil makes the metal magnetic
1	Oil	oil	NOUN	NN	Number=Sing	2	nsubj	_	_
2	makes	make	VERB	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	0	root	_	_
3	the	the	DET	DT	Definite=Def|PronType=Art	4	det	_	_
4	metal	metal	NOUN	NN	Number=Sing	2	obj	_	_
5	magnetic	magnetic	ADJ	JJ	Degree=Pos	2	xcomp	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **make** | present | Oil | the metal |  |  |  | magnetic *property* | vn build-26.1-1 «NP.material V NP»: agent=Material metal=Product |

### Option 3 {#o3}

<!-- .ven lang=en -->
Oil makes the chain heavier and stronger

```conllu
# sent_id = question:world:51-forces:t6:o3:1
# text = Oil makes the chain heavier and stronger
1	Oil	oil	NOUN	NN	Number=Sing	2	nsubj	_	_
2	makes	make	VERB	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	0	root	_	_
3	the	the	DET	DT	Definite=Def|PronType=Art	4	det	_	_
4	chain	chain	NOUN	NN	Number=Sing	2	obj	_	_
5	heavier	heavy	ADJ	JJR	Degree=Cmp	2	xcomp	_	_
6	and	and	CCONJ	CC	_	7	cc	_	_
7	stronger	strong	ADJ	JJR	Degree=Cmp	5	conj	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **make** | present | Oil | the chain |  |  |  | heavy *property* | vn build-26.1-1 «NP.material V NP»: agent=Material chain=Product |

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

<!-- .ven lang=en -->
Oil reduces the friction between the moving parts

```conllu
# sent_id = question:world:51-forces:t6:o4:1
# text = Oil reduces the friction between the moving parts
1	Oil	oil	NOUN	NN	Number=Sing	2	nsubj	_	_
2	reduces	reduce	VERB	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	0	root	_	_
3	the	the	DET	DT	Definite=Def|PronType=Art	4	det	_	_
4	friction	friction	NOUN	NN	Number=Sing	2	obj	_	_
5	between	between	ADP	IN	_	8	case	_	_
6	the	the	DET	DT	Definite=Def|PronType=Art	8	det	_	_
7	moving	move	VERB	VBG	VerbForm=Ger	8	amod	_	_
8	parts	part	NOUN	NNS	Number=Plur	4	nmod	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **reduce** | present | Oil | the friction |  |  |  | between the moving parts | vn limit-76 «NP V NP»: agent=Causer friction=Patient |
| 2 | **move** | gerund |  |  |  |  |  |  | vn roll-51.3.1 «NP.theme V»: agent=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 -->

<!-- pn -->
- ← previous: [Forces — pushes, pulls, friction and m…, test 5](https://md.mova.elamur.ai/free/en/corpora/questions/world/51-forces/t5/)
- next →: [Forces — pushes, pulls, friction and m…, test 7](https://md.mova.elamur.ai/free/en/corpora/questions/world/51-forces/t7/)
- ↑ back to [Forces — pushes, pulls, friction and magnets](https://md.mova.elamur.ai/free/en/corpora/questions/world/51-forces/)