The newest HVACR control systems operate by:
A) Providing a modulating air pressure in response to monitored conditions.
B) Turning relay coils on or off to complete circuits.
C) Processing electronic signals with a microprocessor.
D) Providing a varying DC voltage in response to monitored conditions.
C
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The Sherman Anti-Trust Act was at first primarily used to curb the power of
A. mining companies. B. labor unions. C. oil companies. D. railroad corporations. E. banking syndicates.
Prior to the development of the computer, drawings were made on vellum using pencil and ink in a process known as ____.
A. dimensioning B. CAD C. exploded assembly D. drafting
What is OSHA's mission/purpose?
What will be an ideal response?
This type of A/D converter uses a DAC and binary counter to generate a digital value of an analog input
A) stairstep-ramp B) sampler C) encoder D) flash converter