Compared to furnaces installed at lower altitudes, furnaces installed at higher altitudes:
A) Require a larger vent. B) Have a higher firing rate.
C) Have a lower firing rate. D) Heat up more quickly.
C
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The float switch contacts may be either normally open or normally closed and ____.
a. may not be submerged b. may not be suspended c. may be submerged d. may be suspended
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Pressure is defined as:
a. area ÷ force b. force ÷ mass c. force ÷ area d. sum of partial pressures
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In T-budding, the rootstock must be dormant
Indicate whether the statement is true or false
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Reciprocating compressors have ____.
A. a piston and cylinder B. two scrolls that mesh together C. a rotor to compress the refrigerant D. a large fan compressor component
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