Technician A says that two diodes are required for each stator winding lead. Technician B says that diodes change alternating current into direct current
A) A only B) B only C) Both A and B D) Neither A nor B
C
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To help prevent damaging the first winding, some circuits contain a timer that disconnects power to the motor if the second winding is not energized within a predetermined time. This timer is often called a(n) ____________________.
Fill in the blank(s) with the appropriate word(s).
What happens at the end of conversion in interfacing of the ADC to the 8051?
A) Port 1 is read into register 0. B) Port 1 is read into register 1. C) Port 0 is read into register 0. D) none of the above
How many stages would be required for a cascaded BCD counter to provide a decimal count of 9,999?
A) 3 B) 6 C) 5 D) 4
Positive displacement compressors have crankcase heat to ____.
A. preheat the chilled water for better efficiency B. prevent refrigerant migration to the compressor C. preheat the compressor bearings for longer wear D. minimize condenser subcooling