Sensors and transmitters are often combined into one unit.
Answer the following statement true (T) or false (F)
True
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Which of the following best defines particle density?
a. What soil would weigh if there were no pore space b. The density of a soil’s solid particles only c. Neither d. Both
Which of the following statements about ammonia as a refrigerant is true?
A) Ammonia is slightly less efficient in heat transfer than halocarbon refrigerants. B) Ammonia costs more than other common refrigerants. C) Ammonia is poisonous and must be handled with extreme care. D) Ammonia piping cannot be constructed from copper.
A technician needs to check a single-phase compressor. He labels the three terminals "A," "B," and "C" and takes resistance readings of the windings. He reads 10 ohms from "A" to "B," infinity from "B" to "C," and infinity from "C" to "A." Identify the terminals.
A. A: common B: start C: run B. Cannot identify terminals: winding grounded C. A: start B: run C: common D. Cannot identify terminals: open winding
In 1959, the first driver's side air bag was introduced in the passenger car.
Answer the following statement true (T) or false (F)