Title: Chapter #2 Test
Course: Programmable Logic Controls (IC 107-IC 107) > Section: Assessments

Q: A ________ is an example of an actuator that could be controlled by a discrete output from a PLC.
- pushbutton
- motor starter
- limit switch
A: pushbutton

Q: A ___________ module is used to establish connections for the exchange of data.
- thumbwheel
- communication
- servo
- PID
A: thumbwheel

Q: A modular PLC that has room for several I/O modules, is capable of being customized for a particular application.
- True
- False
A: True

Q: When a new program is loaded into a PLC's memory, the old program that was stored in the same locations is over-written and essentially erased.
- True
- False
A: True

Q: Analog signals can have only two states.
- True
- False
A: False

Q: Discrete I/O modules can be classified as:
- bit oriented.
- word oriented.
- processor oriented.
- power supply oriented.
A: bit oriented.

Q: Discrete means that each input or output has two states: true (on) or false (off).
- True
- False
A: True

Q: Electronic components found in PLC modules:
- are not effected by electrostatic voltages.
- can be damaged by electrostatic voltages.
- can have their performance degraded by electrostatic voltages.
- both b and c.
A: are not effected by electrostatic voltages.

Q: High-density I/O modules:
- may have up to 64 inputs or outputs per module.
- require more space.
- can handle greater amounts of current per output.
A: may have up to 64 inputs or outputs per module.

Q: One advantage of discrete relay contact output modules is that they can be used with AC or DC.
- True
- False
A: True

Q: One function of a PLC input interface module is to:
- accept signals from field devices and convert them into signals that can be used by the processor.
- convert signals from the processing unit into values that can be used to control the machine or process.
- input signals from the programming device and convert them into signals that can be used by the CPU
- interpret and execute the user program that controls the machine or process.
A: accept signals from field devices and convert them into signals that can be used by the processor.

Q: Status indicators are provided on each output of an output module to indicate that the:
- load has been operated.
- input associated with the output is active.
- module fuse has blown.
- output is active.
A: load has been operated.

Q: The Allen-Bradley SLC-500 address I:2/4 refers to an:
- Input module in slot 4, terminal 2.
- Output module in slot 4, terminal 2.
- Input module in slot 2, terminal 4.
- Output module in slot 2, terminal 4.
A: Input module in slot 4, terminal 2.

Q: The I/O system provides an interface between:
- input modules and output modules.
- the CPU and field equipment.
- the CPU and I/O rack.
- the I/O rack and I/O, modules.
A: input modules and output modules.

Q: The location of a specific input or output field device is identified by the processor by means of its:
- voltage rating.
- current rating.
- wattage rating.
- address.
A: voltage rating.

Q: The most common form of memory used to store, back up, or transfer PLC programs is:
- RAM
- Flash EEPROM
- EEPROM
- both b and c
A: RAM

Q: The purpose of the LED indicator is to:
- aid in fault diagnosis.
- set the minimum level of voltage that can be detected.
- protect against electrical noise interference.
- separate the higher line voltage from the logic circuits.
A: aid in fault diagnosis.

Q: The purpose of the optical isolator is to:
- aid in fault diagnosis.
- set the minimum level of voltage that can be detected.
- protect against electrical noise interference.
- separate the higher line voltage from the logic circuits.
A: aid in fault diagnosis.

Q: Volatile memory elements can be classified as those that:
- do not retain stored information when the power is removed.
- retain stored information when the power is removed.
- do not require a battery backup.
- both b and c.
A: do not retain stored information when the power is removed.

Q: Which of the following is not a function of a PLC programming device?
- To enter the user program
- To change the user program
- To execute the user program
- To monitor the user program
A: To enter the user program