What three things are required for combustion to take place?

What will be an ideal response?


ANSWER: 1. oxygen
2. fuel
3. source of ignition (heat)

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The number of basic grades in which Plyform sheets for form building are available is _____.

a. two b. three c. four d. five

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Two types magnets are in use today: the electromagnet and the ____________________ magnet.

Fill in the blank(s) with the appropriate word(s).

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Which of the following specifications for engine timing gear train backlash would be typical?

A. 100 mm B. 200 mm C. 400 mm D. 800 mm

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What is formed in the heat exchanger of a high-efficiency furnace that requires a drain?

What will be an ideal response?

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