Most lasers used for cutting, drilling, and welding produce a laser light beam in the ____ range.
A. radio wave
B. infrared
C. microwave
D. visible
Answer: B
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Construction methods and materials can reduce sound transmission into the building.
Answer the following statement true (T) or false (F)
Which of the following motors provides constant speed from no-load conditions to full-load conditions?
a. Series DC b. Squirrel cage induction c. Synchronous d. Shunt DC
The most common type of starter drive is the ____.
A. compound motor B. drive pinion C. Bendix drive D. overrunning clutch
The required system capacity in tons can be determined by dividing:
A) 200 BTUs/min by the system's refrigeration effect. B) 100 BTUs/min by the system's refrigeration effect. C) 300 BTUs/min by the system's refrigeration effect. D) 600 BTUs/min by the system's refrigeration effect.