WorksheetsTOPIC 1 - INTRODUCTION TO AUTOMATION SYSTEM
Total questions: 8
Worksheet time: 33mins
The timed relay contact shown is designed to operate so that:
a. when the relay coil is energized, there is a time delay in closing
b. when the relay coil is energized, there is a time delay in opening
c. when the relay coil is de-energized, there is a time delay in closing
d. when the relay coil is de-energized, there is a time delay in opening
The timing diagram shown is that of an
a. on-delay timer circuit (NOTC contact)
b. on-delay timer circuit (NCTO contact)
c. off-delay timer circuit (NCTC contact)
d. off-delay timer circuit (NOTO contact)
In the circuit shown, the light will stay off
a. as long as S1 is closed
b. for 10 seconds after coil TD is energized
c. for 10 seconds after coil TD is de-energized
d. both a and c
________is a PLC instruction measuring the amount of time elapsed following an event.
Timer
Latching
________ is used for circuit that is able to hold the output energized.
Timer
Latching
________ is a PLC instruction that counts the number of occurrences of an event.
Timer
Counter
In a timer circuit, the output will remain active:
d. for a fixed duration regardless of the timer setting
b. immediately after the timer is energized
c. only when the timer is de-energized
a. until the timer reaches its preset value
________ is a type of relay that maintains its state after the control signal is removed.
Timer
Latching relay
