Vocabulary Examination 15

Test # 15


1.
The curious crowd gathered to watch the irate customer ________ about the poor service he received in the restaurant.

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Precautions while using Refrigerators

Do not spray the refrigerator

Do not spray the refrigerator with waterwhile it is plugged in, as it may cause anelectric shock.Commercial refrigerator and freezer units, which go by many other names, were in use for almost 40 years prior to the common home models. They used gas systems such as ammonia (R-717) or sulfur dioxide (R-764), which occasionally leaked, making them unsafe for home use. Practical household refrigerators were introduced in 1915 and gained wider acceptance in the United States in the 1930s as prices fell and non-toxic, non-flammable synthetic refrigerants such as Freon-12 (R-12) were introduced. However, R-12 damaged the ozone layer, causing governments to issue a ban on its use in new refrigerators and air-conditioning systems in 1994.

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