With a dual-fuel heat pump, at what outdoor temperature is the heat pump typically locked out and the
furnace activated to provide heat?
a. Below 25°F
b. Below freezing
c. Slightly above the structure's balance point
d. 10°F below the balance point
c
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Most digital ohmmeters have an audible tone to indicate a closed or low-resistance circuit, making them useful for performing _____.
a. continuity tests b. polarity tests c. voltage tests d. frequency tests
A useful tool to help you to keep track of a string of phone conversations and messages is a ________.
A) Phone log B) Project tracking report C) Road map D) To-do list
Which of the following is a drawback of genetic diversity?
a. animals' varying care requirements b. lack of ability to fight disease c. reduced ability to adapt to the environment d. difficulty producing offspring
Control valves used for water coils are typically:
A) Three-way valves. B) Either two-way or three-way valves. C) Four-way valves. D) Two-way valves.