The speed of an AC servo motor is controlled by the __________.
A. frequency of the AC supply
B. amplitude of the signal supplied to the main winding
C. amplitude of the signal supplied to the auxiliary winding
Answer: C
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A water heater uses 100?kW to heat 60 gallons of liquid water from an initial temperature of 20°C. The average density and specific heat of the water are 970?kg/m3 and 4.18?kJ/kg•K, respectively. According to the service restrictions of the ASME Boiler and Pressure Vessel Code (ASME BPVC.IV-2015, HG-101), water heaters should not be operating at temperatures exceeding 20°C at or near the heater outlet. Determine the heating duration such that the final water temperature that would exit the water heater would be in compliance with the ASME Boiler and Pressure Vessel Code.
What will be an ideal response?
According to technicians that take the exam, which question type is the most difficult?
A) Most-likely type questions B) All of these EXCEPT questions C) Multiple choice single answer D) Technician A/Technician B
The alternating current frequency supplied by the power companies in the United States is ____________________ hertz.
Fill in the blank(s) with the appropriate word(s).
Which of the following is LEAST-Likely a component of the steering system?
A. Steering gear B. Steering linkage C. Steering column D. Steering axle