This feature control is normally used for controlling arcs and curves.
A. circularity
B. profile
C. angularity
D. cylindricity
Answer: B
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An open door switch on a gas furnace will cause
A) The door open alarm to sound, but will not affect system operation B) A complete system shut down, no system operation at all C) The combustion process to shut down, but will not affect the indoor blower D) The indoor blower to shut down, but will not affect the combustion process
Name and describe the four stages of the VFD.
What will be an ideal response?
The current flowing past a point in a device is shown in Fig. 1.25. Calculate the total charge through the point.
 FIGURE 1.png)
A fixed-restriction system operating with a refrigerant overcharge will have:
A) A high system superheat. B) A low system superheat. C) A low subcooling. D) Higher temperature drop across the evaporator.