Question

1. In order to ensure that two actions cannot work at the same time, normally both contractors’ coils are connected in series to each other’s NC contact, we call this style (    ).

A. SELF-LOCKING B. INTERLOCKING

C. SHORT CIRCUIT PROTECTION D. Safe PROTECTION

2.IF someone wants to reset Q0.0 to Q1.7, he or she can reset (    ) directly.

A. Q0 B. QB C. QW0 D. QD0

Answer 1

1. In order to ensure that two actions cannot work at the same time, normally both contractors’ coils are connected in series to each other’s NC contact, we call this style ( ).
A. SELF-LOCKING
B. INTERLOCKING
C. SHORT CIRCUIT PROTECTION
D. Safe PROTECTION

ANS) B) INTERLOCKING
An interlock is a feature that makes the state of two mechanisms or functions mutually dependent. It may be used to prevent undesired states in a finite-state machine, and may consist of any electrical, electronic, or mechanical devices or systems.

2.IF someone wants to reset Q0.0 to Q1.7, he or she can reset ( ) directly.

A. Q0
B. QB
C. QW0
D. QD0

ANS) B) QB

ACTUALLY here we see that Q0 stands output
QB stands for memory bit
QW0 stands for word
QD0 stands for double word