Category 1
PC boards and other solid-state devices and circuits may be damaged or destroyed by as little as a ? electrostatic discharge.
10V
When a manually operated safety switch and a magnetic motor starter are housed in the same enclosure, the device is identified as a(n) ? motor starter.
Combination
What is the photoelectric scanning method in which the transmitter and receiver are placed opposite each other?
Direct
The labels “A1” and “A2” are used to indicate the ? on a(n) ? relay.
Coil / IEC
Current-sourcing devices use the ? side of the DC output as the switch leg to the load.
Positive
A programmable logic ? is a solid state device, which contains discrete DC and AC input interfaces and discrete DC and AC output interfaces.
Relay
Applying power to which pins in the eight-pin relay wiring diagram will turn on the timer and begin (initiate) the time delay?
Pin 2 and 7
NEMA machine control relays may be rated up to ? .
20A
In a ladder diagram, input and output devices are drawn on lines called ? .
Rungs
With Hall effect sensors, ? actuation is where the magnet swings back and forth across the face of the sensor.
Pendulum
Ambient temperature is a disadvantage when using ? overload relays.
Thermal
Examine the following MCC. How many total operating handles are shown for this MCC?
12
A ? is a device used for signal re-transmission when the cable length exceeds the specification of the cable type for reliable signal transmission.
Repeater
The following diagram illustrates a ? pole ? throw switch.
Double / Double
The ? solid-state timer or interval timer is a timing device where the timed contacts change state immediately when the timer’s trigger contacts are closed or power is applied to the timer.
One-shot
The use of fuses on the primary and secondary side of a control transformer is specified by the ? .
NEC
Which of the following characteristics can be used to describe IEC devices?
Smaller
In which of the following NEMA standards would information about a controller’s interrupting capacity be found?
Performance
? are electronic devices that monitor an AC or DC voltage and provide an output if that voltage is out of specification.
Voltage Sensors
The process of passing an AC voltage through a diode results in a ? DC voltage.
Pulsating
A(n) ? is a command that will cause a PLC to perform a certain predetermined operation.
Instruction
A(n) ? proximity sensor can detect a wide range of materials, including metals (ferrous and nonferrous), glass, plastics, and liquids.
Capacitive
In the diagram below, select the device that would be placed in the signal section of the control circuit.
Limit Switch
Overcurrent protection will protect a motor ? .
From damage due to excessive current
Which network links branch offices and single mobile users to a local enterprise network or the Internet?
Remote