____ is the electric/hybrid color for cables and connectors, which can range from 144 to 650 volts. This can kill you!
A. Black
B. Blue
C. Yellow
D. Orange
Answer: D
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According to the greenhouse effect theory, higher concentrations of ________ in the atmosphere increase the earth's temperature
a. Oxygen c. Nitrogen b. Carbon dioxide d. Hydrogen dioxide
Technician a says that SAE standard J639 spells out details for system design implementation and service. Technician b says that SAE standard J639 specifies refrigerant fitting type and size for each refrigerant. Who is right?
A) A only B) B only C) Both A and B D) Neither A or B
Which of the following statements is TRUE about the economizer?
A) The economizer cools the liquid refrigerant but does not affect the volume of available liquid refrigerant. B) The economizer acts as a control valve and separates the liquid cooled and warmed refrigerant. C) The economizer provides more cooled liquid refrigerant to the cooler than do systems without an economizer. D) The economizer is directly connected to the compressor, so liquid refrigerant that flashes is returned directly to the compressor.
If +2 volts is applied to the inverting input of an op amp comparator, and -2 volts is applied to the non-inverting input, the output will be at a __________ volt saturation.
A. positive B. negative