How do environmental variables complicate HVACR testing?
A) When completed, the tester must note testing conditions and type of HVACR testing.
B) Environmental conditions have little impact on testing.
C) Testing conditions, such as air pressure and temperature, can affect testing.
D) Many types of HVACR testing, organizations, and standards exist.
C
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Small flocks of fewer than 100 heads account for _____ percent of the sheep operation in the United
States.
a. 30 c. 60 b. 50 d. 90
A ____ changes its internal resistance when its surface is struck by light.
A. photoconductive cell B. light-emitting diode C. zener diode D. bipolar junction transistor
____ flow sensors operate on the principle that when a moving liquid strikes an object, a swirling current is created.
A. Vortex B. Orifice plate C. Liquid D. Air
In the colonial wars before 1754, Americans
A. functioned as a unified fighting force. B. received more support from France than Britain. C. demonstrated an astonishing lack of unity. D. were not involved in combat. E. rarely involved Indians in the fighting.