|
The scan time is the time required ___
|
|
1
|
271
|
July 25, 2023
|
|
More than one pushbutton station (operator’s control station) can be installed for a given control line in a control circuit (line or ladder diagram). Multiple NC Stop PB switches must be wired in ___ to form a NOR logic gate (circuit)
|
|
1
|
157
|
July 25, 2023
|
|
The output of a PLC counter is energized when ___
|
|
1
|
276
|
July 25, 2023
|
|
PLC counters are normally non-retentive
|
|
1
|
259
|
July 25, 2023
|
|
Optical isolation used in I/O modules helps to reduce the effects of electrical noise
|
|
1
|
115
|
July 25, 2023
|
|
An inductive proximity sensor is actuated by conductive and ___
|
|
1
|
145
|
July 25, 2023
|
|
An air-operated isolation valve requires 2,400 pounds-force applied to the top of the actuator diaphragm to open against spring pressure ___
|
|
1
|
152
|
July 25, 2023
|
|
When a relay-logic Wired-AND gate is employed in a motor control circuit, the ___
|
|
1
|
143
|
July 25, 2023
|
|
Analog signals can have only two states
|
|
1
|
141
|
July 25, 2023
|
|
The acronym SPDT identifies a ___ - ___, ___ switch
|
|
1
|
138
|
July 25, 2023
|
|
When a PB-switch-logic Wired-Exclusive-OR gate is employed in a motor control circuit, When both switches are activated, the PB-switch-logic output, taken at the common node forming the OR gate of the two series-connected switch inputs, is ___ volts
|
|
1
|
95
|
July 25, 2023
|
|
When a relay-logic Wired-AND gate is employed in a motor control circuit ___
|
|
1
|
155
|
July 25, 2023
|
|
A PLC down-counter (CTD) counter counts ___
|
|
1
|
122
|
July 25, 2023
|
|
The maximum current rating for the individual outputs of an AC output module ___
|
|
1
|
182
|
July 25, 2023
|
|
Design a logic circuit that triggers an alarm if motion is detected or if the door is opened
|
|
0
|
94
|
July 19, 2023
|
|
The purpose of the optical isolator is to ___
|
|
1
|
261
|
July 6, 2023
|
|
One advantage of discrete relay contact output modules is that they can be ___
|
|
1
|
135
|
July 5, 2023
|
|
What is the purpose of a valve positioner in a typical pneumatic valve control system ___
|
|
1
|
363
|
July 5, 2023
|
|
The main difference between a PLC retentive and non-retentive timer is ___
|
|
1
|
1435
|
June 26, 2023
|
|
The fastest method for transferring data from one register to another is the ___
|
|
1
|
826
|
June 26, 2023
|
|
The PLC chassis comes in different sizes according to the ___
|
|
1
|
304
|
June 21, 2023
|
|
Add the hex numbers 58 and 24 ___
|
|
1
|
574
|
May 24, 2023
|
|
For the PLC analog I/O control system shown, the fluid flow is controlled by ___
|
|
2
|
457
|
October 7, 2022
|
|
A sequential logic circuit where the storage elements commonly used are time-delay devices (usually gates) ___
|
|
0
|
206
|
April 6, 2021
|
|
The retentive timer reset (RES) instruction is always given the same address ___
|
|
0
|
210
|
July 6, 2022
|
|
Some PLC counters operate on the leading edge of the input signal
|
|
0
|
229
|
July 8, 2022
|
|
The counter accumulated value is the current count based on the ___
|
|
0
|
273
|
July 8, 2022
|
|
Fiber optic sensor systems are completely immune to all forms ___
|
|
0
|
176
|
July 20, 2022
|
|
In a PLC system, there is a physical connection between field input devices ___
|
|
0
|
257
|
July 25, 2022
|
|
The input/output system forms the interfaces through which field devices ___
|
|
0
|
166
|
July 25, 2022
|
