A fuse protects an electrical circuit by:
A) Limiting the voltage that can flow through the fuse.
B) Melting when excessive current flows through it, opening the circuit.
C) Using a heat motor that operates an imbedded set of contacts to open the circuit.
D) Using a material that limits the amount of current that can pass through the fuse due to the increase in the material's resistance.
B
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Pellet furnaces are designed to work like traditional fossil fuel furnaces except that they always burn corn pellets
Indicate whether the statement is true or false.Reforestation and _____ have helped reduce erosion in forest areas
a. seedlings b. clear-cutting c. wind erosion d. cover crops
There are 3 classes of standpipe systems, and they are classified depending on who is expected to use the system and the size of the fire hoses in the system. Which of the following statements is inaccurate?
A. Class I. This system is designed to be used only by the NYFD B. Class II. This system is designed to be used by the occupants of a shelter. C. Class III. This system may be used by either trained fire fighters or by occupants of a shelter. D. Class I. fire hoses are 2½ inches in diameter; Class II. fire hoses are 1½ inches in diameter.
_____ are durable, fireproof, and recyclable but often have high embodied energy due to fossil fuels used in kiln baking.
A. Cedar shakes B. Fiber-cement tiles C. Clay tiles D. Slate tiles