Smoke detectors should be placed on the ceiling or high on a wall. Dead air spaces should be avoided. Where does dead air spaces occur?
A. in the middle of the ceiling
B. all areas of the room above 6 feet
C. the four sides of a room where the walls meet each other
D. at the top edge of a room where the ceiling and wall meet.
Answer: D. at the top edge of a room where the ceiling and wall meet.
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____ learning involves learning by being engaged in the educational process.
a. Passive b. Direct c. Online d. Active
Engines are most often used to transfer mechanical energy into thermal energy
Indicate whether the statement is true or false.
What is the circumference of a circle whose radius equals 18.246 centimeters? Use 
= 3.1416 and round to 3 decimal places.
Fill in the blank(s) with the appropriate word(s).
Which agency is responsible for the maintenance and publication of the NEC®?
A. National Association of Electrical Engineers (NAEE) B. National Firefighters Association (NFA) C. Underwriter's Laboratory (UL) D. National Fire Protection Association (NFPA)