問題文
An engineer reads the table of the two lights on a supply module of a switch and works out what a dark light stands for on the one and on the other. Which statement is correct?
選択肢
- Red is shown by both of the lights once the unit has given way, and a dark light beside the meter stands for a unit that has yet to be woken by the console.
- A dark light on the input side stands for a want of feed at the socket, and a dark light on the output side stands for an output that has been held back or a feed beyond the range the unit works over.
- The light on the input side reports an output that the unit has held back, and the light beside the meter on the output side goes dark once the feed at the socket has gone.
- Both of the lights stand dark for a want of feed at the socket, and a red light on the input side stands for a feed beyond the range the unit works over.