# Building a Simple Water Clock: answers and explanations

Testmigo IELTS Practice

Source: Written by Testmigo.

## Answer key

| Q | Answer | Proof |
| --- | --- | --- |
| 28 | reservoir | an upper container called the reservoir |
| 29 | nozzle | The water drips through a narrow brass nozzle |
| 30 | float | Resting on the surface inside the cylinder is a float |
| 31 | overflow | the reservoir is filled and the overflow is checked |
| 32 | litre | exactly one litre of water passes through it in an hour |
| 33 | pointer | recording the height of the pointer at the end of each hour |
| 34 | B | which made the hours uneven |
| 35 | F | the water leaves through the outlet at a steady rate |
| 36 | A | they worked at night and on cloudy days, when sundials were useless |
| 37 | C | Their main weakness was temperature |
| 38 | stone bowls | were simple stone bowls with a hole near the base |
| 39 | twenty minutes | could lose almost twenty minutes a day in winter |
| 40 | a stove | placed their clocks indoors near a stove |

## Why these answers are right

**28. reservoir.** Paragraph 2 names the upper container directly: water is poured into an upper container called the reservoir. The label points at the top tank on the diagram, so reservoir is the one word required.

**29. nozzle.** Paragraph 3 says the water drips through a narrow brass nozzle into the cylinder below. The label points at the small outlet under the tank, and only one word is allowed, so the answer is nozzle rather than brass nozzle.

**30. float.** Paragraph 3 describes a float resting on the surface inside the cylinder, with a rod and pointer attached. The label marks the flat object on the water, so float is the answer.

The why and the trap for questions 31 onwards are free with an account on the [answers page](https://testmigo.com/ielts/reading/building-a-simple-water-clock/answers).

[Practice Building a Simple Water Clock](https://testmigo.com/ielts/reading/building-a-simple-water-clock)