A it you were trying to tnd aire on a teminal board? B. B C. c D. D Rafer to the

Question

A it you were trying to tnd aire on a teminal board? B. B C. c D. D Rafer to the diagram below to answer questions 21 and 22 Stop H Conveyor B. 109A G ASSE 2 Assume C motor stop b 21. Wwth all conveyors ruming what happens when OL3 opens? A. Conveyors M1 and M3 stop B. Conveyors M2 and M3 stop C Conveyors M1 and M2 stop D. All conveyors stop which contact will automatically open the initialy energized outpu 2. Tonun all conveors, which conveyer must be stated Arst? A M1 B M2 C. M3 D. Any one of the conweyors o. D

Explanation / Answer

20) Answer : (A) A1

Cause this contact is holding the circuit on even after the push button is released.

21) Answer : (D) All conveyors stop.

As OL3 actuates it turn off M3, M2 has interlocking with M3 so M2 will also turn off, M1 has interlocking with M2 so as M2 stops M1 also turned off. Eventually all conveyors stop.

22) Answer: (C) M3

As previously discussed interlocking system the way conveyors should start is first M3 then M2 then M1.

23) Answer: (A) 109A55E

24) Answer: (A) A

Cause A contact depends upon the timer.

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