The base unit for power is the ____
a. ampere
b. watt
c. volt
d. ohm
b. watt
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? The key to preventing burns starts with proper _____.
A. ?clothing B. ?safety glasses C. ?training D. ?first aid
Once an interview has been granted, the employer will want to see ____.
A. your notebook with engineer's sketches B. one example of an engineering drawing you produced C. one example of a section drawings you created D. your portfolio of drawings
When flushing the system, you should:
A) Disconnect the lines and flush through them separately. B) Flush through the entire system through the service valves. C) Always flush through the accumulator to remove accumulated debris. D) Flush through the compressor first.
Answer the following statement(s) true (T) or false (F)
1. Industry is operated by three-phase power, so it is necessary to change three-phase alternating current into direct current. 2. There are two types of three-phase rectifiers: the half-wave and the bridge. 3. The three-phase bridge type rectifier has a higher average DC voltage than the three-phase, half-wave rectifier. 4. Six-phase half wave rectifiers produce two times the ripple as a three-phase full-wave rectifier. 5. The amount of ripple produced by a rectifier can become a matter of great importance; for this reason, there are rectifiers that operate on 4, 8, or 16 phases.