What type of sensor is most often used to detect very low parts per million for toxic refrigerants?
A) Electrochemical sensors (EC) B) Ceramic metal oxide semiconductors (CMOS)
C) Nondispersive infrared (NDIR) D) Photoaccoustic infrared (PIR)
A
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What will be an ideal response?
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Open-loop, water-source heat pump systems involve the transfer of heat between a water source and the air or water being circulated to a(n) ____________________ space.
Fill in the blank(s) with the appropriate word(s).
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L. A. Stoddart
What will be an ideal response?
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What part(s) wears rapidly if a vehicle equipped with an open differential spins one wheel on ice or snow for an extended period of time?
A) Side gear B) Pinion and side gear thrust washers C) Pinion bearings D) Ring gear and pinion
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