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IELTS Practice Reading: Note/Summary Completion Diagram ID: #56541 Easy Investigations
Instructions
Choose NO MORE THAN THREE WORDS from the passage for each answer.
Tap any word for its meaning

All went well for the first ten years, then pitting and grooving of the cylinders and pistons occurred. Investigations showed that the canal water used as the hydraulic liquid was contaminated by chemicals and was corrosive, therefore causing the damage. It was immediately changed to distilled water from the steam engine powering the hydraulic pump. Corrosion was dramatically reduced bur the damage had been done.

In addition, the boiler for the steam engine needed renewing, so in 1906 the Trustees ordered the construction of a new lift, to a design by their engineer J.A Saner. The new lift was built over the top of the Victorian structure, utilizing the Victorian front and rear columns. The main structure had strong A-frames at either side of the new lift to support the enormous weight of the platform that now formed the top of the framework: on it was located the new operating mechanism, which included seventy- two pulleys weighing up to 35 tonnes each.

Each of the boat-carrying tanks was now suspended on wire ropes which ran from the tank to the top of the lift, around pulleys, and down to cast-iron weights at the side of the structure. These were equal to the weight of the water-filled tank. Turning the pulleys one way or the other moved the ropes, so that one tank was raised or lowered independently of the other rank. Because the ranks were counterbalanced by the weights, only a small electrical motor was required to turn the pulleys and so move the tanks up or down.

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