Who invented the concept of latent heat that was critical to the development of the steam engine?

A. Sadi Carnot
B. Nicolas Cugnot
C. George Stephenson
D. Joseph Black


Answer: C

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Clay was the first material to be used for mortar.

Answer the following statement true (T) or false (F)

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What is the ring land and groove area of a piston known as?

A. headland B. crown recess C. ring belt D. skirt

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The chance that a given event will occur is called _____.

a. risk b. exposure c. probability d. consequence

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Which type of engine-driven AC generator is commonly used as a standby system because they have a longer life and require less maintenance?

a. Diesel-powered b. LP gas-powered c. Liquid-cooled d. Air-cooled

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