Fire-resistance rating is a property of

A) the materials and the weight of assembly.
B) the assembly as a whole.
C) the material of which the assembly is made.
D) the total thickness of assembly.
E) none of the above.


B) the assembly as a whole.

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Air passes over a hot metal bar which has a surface area of 2.5 ft2. The temperature of the air is 70°F, while the bar has a temperature maintained at 280°F. If the convective heat transfer coefficient is 4 Btu/h-ft2-°F, determine the rate of convective heat transfer from the plate.

Given: A = 2.5 ft2; Tf = 70°C; Ts = 280°C; h = 4 Btu/h-ft2-°F What will be an ideal response?

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_____ should be clipped soon after birth.

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

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What is the difference between a liquid receiver and a suction line accumulator?

What will be an ideal response?

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The movement of free electrons is called electron current

Indicate whether the statement is true or false

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