The roof membranes on a low-slope roof consist of one the following: built-up roof membrane, modified-bitumen roof membrane, or single-ply roof membrane. Which of these membranes are hot-mopped or heat-applied?
What will be an ideal response?
Built-up roof membrane and modified bitumen roof membrane.
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Because of the manufacturing process, ferrous metals contain a certain amount of carbon. Cast iron has much larger amount of carbon (2.5% to 4%) as compared with steel (0.1% to 1.7%). How does carbon affect the property of cast iron and steel?
What will be an ideal response?
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Explain how fire monitors are used to fight fires.
What will be an ideal response?
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When a forward bias voltage is applied to the LED, the interaction between electrons and holes causes the LED to ____.
a. short b. explode c. burn out d. glow
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What is the area of the soil called that contains the roots of plants?
a. parentsphere c. R horizon b. hemisphere d. rhizosphere
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