In the diagram, determine the value of ?2 if .



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


93°46'

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Which of the following are the code requirements for fire ratings in mechanical/electrical spaces? Select all that apply.

A) Chiller rooms do not need fire ratings unless the refrigerant is flammable. B) A 1-hour room is needed if there is a dry type transformer rating higher than 112-1/2 kVA. C) All gas fired boiler rooms need to be fire rated. D) Electrical rooms with switchboards and panels do not need rated walls.

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This is an alloy of iron containing 0.8 to 1.5 percent carbon.

a. alloy cast iron b. nodular cast iron c. malleable cast iron d. steel

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If a walk-in is running at a 50° box temperature, what should the evaporator temperature be?

a. 20° b. 25° c. 30° d. 40°

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Determine the final ratio of the following: Transmission first gear has a ratio of 2.82:1; drive axle has 3.93:1.

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

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