Generally, solid modelers offer at least three types of datum geometries that can be placed into a model: datum points, datum axes, and datum ____.
A. planes
B. edges
C. spheres
D. circles
Answer: A
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Which of the following is the threshold at which a power source is considered high voltage in the context of safety?
a. 120V b. 240V c. 480V d. 600V
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What temperature sensors are used with a commercial air handler?
A) mixed air, supply air, and pre-heat sensors B) mixed air and separated air sensors C) preheat and post heat sensors D) preheat, low temperature, and high temperature sensors
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An inverting amplifier can be built with an op-amp and
A) four resistors B) two resistors C) one resistor D) three resistors
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In general, the largest diameter pipes in a distribution system are the:
A. branch lines B. primary feeder lines C. secondary feeder lines D. distribution lines
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