Expression of IdeasMediumSynthesis: emphasising an engineering feat
Expression of Ideas practice question
While researching a topic, a student has taken the following notes:
- The Pontcysyllte Aqueduct was completed in 1805.
- Its cast-iron trough is 307 metres long and only 1.6 metres deep.
- The trough's joints were sealed with a mix of flannel and lead dipped in boiling sugar.
- It has not leaked in over two centuries.
- Boats still cross it daily.
The student wants to emphasise how remarkable the aqueduct's construction was for its time. Which choice most effectively uses relevant information from the notes to accomplish this goal?
- A. Sealed in 1805 with flannel and lead dipped in boiling sugar, the aqueduct's 307-metre cast-iron trough has not leaked in over two centuries.Correct
- B. Boats still cross it daily.
- C. The trough is 1.6 metres deep.
- D. It was completed in 1805.
Answer: A. Sealed in 1805 with flannel and lead dipped in boiling sugar, the aqueduct's 307-metre cast-iron trough has not leaked in over two centuries.
A homely seal, and two centuries without a leak.
Why the other answers are wrong
- B. Boats still cross it daily.
- Present use, not construction.
- C. The trough is 1.6 metres deep.
- A dimension alone.
- D. It was completed in 1805.
- A date alone.
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