Answer the following statement(s) true (T) or false (F)
1.The world PV market is estimated to be more than 100 million dollars by the year 2020.
2.PV systems are not very reliable and systems parts breakdown all of the time.
3.PV systems have little sound pollution and are very quiet and make no noise when working.
4.The initial cost of a PV system is expensive and many home owners cannot afford such a system.
1.false
2.false
3.true
4.true
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Of the choices listed, which is the best method of troubleshooting an instrumentation problem?
A. Replace components starting with the sensor or sending unit until the instrumentation is working correctly. B. Short the wiring at the associated sensor or sending unit to ground to determine if the wiring is OK. C. Pierce the wire insulation at the sending unit with a test light to determine if voltage is present. D. Use OEM-provided information and procedures to troubleshoot the cause of the instrumentation problem.
The three types of reinforcing tape for drywall use are paper, metal edge, and _____.
a. fiberglass mesh b. perforated c. glue backed d. dustless
How are dry transformers cooled and what are they used for?
What will be an ideal response?
A Category IV operates with
A) a low temperature, negative pressure vent B) a low temperature, positive pressure vent C) a high temperature, positive pressure vent D) a high temperature, negative pressure vent