The phrase “petrol-guzzling vehicles” implies that the major drawback of these vehicles is:

In relation to the information the text offers, mark the statements below as TRUE (T) or FALSE (F): ( ) The Chinese have been holding exports back. ( ) Replacing rare-earth metals is quite an easy task. ( ) Demand for rare earths depends on MIT findings. The statements are, respectively:

According to the text, the environmentalists’ dream is to:

The opposite of “faster” in “would be faster” (l. )is:

The action involved in “to get around a problem” is to:

In “one of the oil industry’s most important innovation targets ”, the underlined word means:

Read the following statements: I. The process of drilling automatically is too costly. II. Automated drilling requires fewer employees. III. Experienced drillers are becoming scarcer. Choose the correct answer:

In relation to the information the text offers, mark the statements below as TRUE (T) or FALSE (F): ( ) Automated drilling is irrelevant to the oil industry. ( ) It is possible to drill 5,000 meters only automatically. ( ) One can fly more than 4,000 miles with an automatic pilot. The statements are, respectively:

Em relação à lubrificação de componentes mecânicos tais como: engrenagens, mancais de deslizamento e mancais de rolamento, avalie se são verdadeiras (V) ou falsas (F) as afirmativas a seguir: I – A utilização de aditivos extrema-pressão nos lubrificantes de rolamentos de esfera auxilia na proteção ao desgaste das superfícies desses componentes. II – A redução da temperatura de entrada de lubrificantes em mancais de deslizamento radiais auxilia positivamente na sustentação hidrodinâmica. III – Para a lubrificação de engrenagens com baixas velocidades de rotação devem ser escolhidos lubrificantes de baixa viscosidade para evitar aumento de temperatura. As afirmativas I, II e III são respectivamente: