A minimum of __________ inches of rigid foam insulation is needed beneath the radiant heated slab to prevent excessive heat loss and improve the efficiency of the system.
A. 3
B. 4
C. 5
D. 6
Answer: B
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Which of the following has the advantage of being resistant to shock and vibration and is commonly used for the I/O track of a programmable controller?
a. Solid-state relay b. Mechanically held relay c. Bimetallic overload relay d. Thermal overload relay
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What views are shown?
What will be an ideal response?
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Steel-wire bar supports that offer no protection against rusting are designated as Class _____.
a. A b. B c. C d. D
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What are the two categories of illnesses caused by foodborne bacteria?
What will be an ideal response?
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