Most selector-switch contact blocks provide two sets of switching contacts.
In one switch position, one set of contacts is held open by spring tension and the position of the cam — __________ (acronym) contacts.
The other set of contacts is held-closed — __________ (acronym) contacts.
When switched to the second position, both sets of contacts are activated.
The previously held-open contacts are now being held ______________.
The previously held-closed contacts are now being held ___________.
A) NO; NO; closed; open
B) NO; NC; closed; open
C) NC; NO; closed; open
D) NO; NC; open; closed
Show Answer
Answer:B
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