What is a redundant gas valve?
A) a gas valve that has no real purpose
B) a gas valve that was once necessary on older furnaces but is no longer used
C) a gas valve that is used in case the main valve quits working
D) a gas valve with two valves mechanically in series
D
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Indicate whether the statement is true or false
Fault isolation diagrams and troubleshooting tables help the technician locate problems through the process of
A) extrapolation B) sublimation C) interpolation D) elimination
Which of the following statements is correct about sizing the supply-side bonding jumper on the line or supply side of the service equipment?
A. It is sized from Table 250.66 in accordance with the size or rating of the overcurrent protective device in the service equipment. B. It is sized from Table 250.122 in accordance with the size rating of the overcurrent protective device in the service equipment. C. It is sized from Table 250.102(C)(1) in accordance with the size of the service-entrance conductors on the supply side of the service. D. It is sized from Table 250.122 in accordance with the size of the service-entrance conductors on the supply side of the service.
What is the maximum peak value of a 60-hertz wave that has an instantaneous voltage of 22 volts 1.67 milliseconds before the end of one cycle? Round the answer to the nearer tenth.
Fill in the blank(s) with the appropriate word(s).