An advantage of extrusion blow molding is ____. ?
A. ?machine cost is low
B. ?very little waste
C. ?most thermoplastics may be used
D. ?many shapes and die configurations are available
Answer: C
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When drawing a PH diagram of an operating system, how is placement of the metering device line determined?
A) The metering device line starts where the condenser line crosses the temperature of the liquid line and then drops straight down until it crosses the evaporator line. B) The metering device line starts where the compressor line crosses the temperature of the liquid line and then drops straight down until it crosses the condenser line. C) The metering device line starts where the condenser line crosses the temperature of the liquid line and then goes straight across until it crosses the compressor line. D) The metering device line starts where the condenser line crosses the temperature of the liquid line and then drops straight down until it crosses the compressor line.
A current relay is ________
A) a relay that is designed to start single-phase compressors B) a relay that is designed to be used as a relay or a contactor C) a special relay designed to control only current
The steam grid humidifier works by
A) Boiling water in a pan to steam B) Passing air over a wetted element C) Spraying water through nozzles and atomizing it to steam D) Introducing live steam into the air stream through a grid of orifices
______________ is a step to implement a preventative maintenance program.
A. Training B. Documentation of activities C. Tracking results D. All answers are correct