A control that responds to changes in pressure is called a:
A) Pressure switch. B) Time clock. C) Humidistat. D) Thermostat.
A
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In addition to cooling the passenger compartment, an air conditioning system ________.
A) Heats the passengers B) Puts moisture in the air C) Dehumidifies the air D) All of these
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What is a pickling solution?
A) A thread sealant that stands up to boiler duty B) A water additive that is used to improve heat transfer C) The circulating water in a hydronic heating system D) A corrosion inhibitor used on steel pipes
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Which IC counters would best be used to configure a divide-by-48 counter?
A) 7490 and 7493 B) 7490 and 7492 C) 7493 and 7492 D) two 7492 ICs
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A(n) ____ is a framed projection above the plane of the roof.
a.extension b.gambrel c.channel d.dormer
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