Inverters are used not only to vary the speed of the squirrel-cage motor, but also to vary its ____, start the motor slowly and smoothly, and increase the motor's efficiency.
A. current
B. torque
C. horsepower rating
D. voltage rating
Answer: B
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Sometimes, the receiver has barriers or _____ that prevent him or her from receiving your message
a. pathways b. static c. noise d. walls
Based on the textbook, how should you charge an R12 walk-in refrigerator with TEV when retrofitting to any alternate HCFC refrigerant?
a. Recover the R12, weight it, then replace with HCFC at 80% of the original amount. b. Charge until the head pressure is correct for the replacement refrigerant. c. Charge until the head pressure is correct for R12 refrigerant. d. Charge until the head pressure is 80% of that of R12 refrigerant.
Wild plants evolved to survive in the ________ conditions of their natural habitats
A) climate B) unusual C) extreme D) weather
Housing expenses should not exceed ________ percentage of gross monthly income
A) 15% B) 30% C) 4% D) 50%