passive voice past simple exercises

There are more uses of air cooled heat exchangers, like the upstream production, refineries and petro-chemical facilities. It can also be employed on situations rich in temperature, high pressure, corrosive fluids and environments. Moreover, air coolers could possibly be equipped and found in oil and coal refineries; compressor stations for gas pipelines; subsurface gas storage facilities; plants producing polychlorvinyl, polyethylene, glass fiber, biplastic; caustic soda plants; by-product coke plants and ammonia transportation and handling plants. M R Kopmeyer, as part of his book, ’How you will get richer, quicker’ suggests us to jot down our ideas in 3” x 5” cards and carry them within our pocket. Ideas in 3” x 5” cards are for re-reading and look at. Frank Bettger in their book, “How I raised Myself From Failure to Success in Selling” reveals his pocket reminder technique: “I comprised a 3” x 5” card, a 'pocket reminder’, per certainly one of my subjects, using a brief summary of the principles. The first week, I carried the charge card Enthusiasm inside my pocket. At odd moments in the daytime, I read these principles. ”