The function of the door interlock switch is to permit the unit to operate only when ____.

a. the AGV is energized
b. the furnace door is closed
c. power is applied
d. the unit is in the heating cycle


b. the furnace door is closed

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Boilers and furnaces which condense flue gas in second heat exchangers generally have annual efficiencies in what range?

A) 85% to 89.5% B) 95% to 99.5% C) 92% to 98.5% D) 90% to 95.5%

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Anemia is a condition associated with iron deficiency

Indicate whether the statement is true or false

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Even with increased leisure time activity for the American public, employment opportunities offered by state and federal governments are not expected to ____

A) increase B) decrease C) stay the same D) none of these

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A male ferret is called a ____________________

Fill in the blank(s) with correct word

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