Title: Chapter #5 Test
Course: Programmable Logic Controls (IC 107-IC 107) > Section: Assessments

Q: A normally open limit switch is wired to an input module, and programmed using XIO instruction. The instruction will be true when:
- power is applied and the PLC is in the run mode.
- the limit switch is closed.
- the limit switch is open.
- never.
A: power is applied and the PLC is in the run mode.

Q: Both normally open and normally closed pushbuttons can be represented by the XIC or XIO instruction.
- True
- False
A: True

Q: Branch input instructions are used to create a:
- series path of input instructions.
- parallel path of input instructions.
- serial connection of input modules
- parallel connection of input modules.
A: series path of input instructions.

Q: Each individual contact instruction can be used only once throughout the program.
- True
- False
A: False

Q: For the program shown, instruction A represents an:
- Examine If Closed instruction.
- Examine If Open instruction.
- Output Energize instruction.
- Input Energize instruction.
A: Examine If Closed instruction.

Q: If any input signal changes state very quickly, it is possible that the controller may never be able to detect the change.
- True
- False
A: True

Q: The __________ instructions always interpret a 1 status as true and a 0 status as false.
- XIC
- XIO
- contact
A: XIC

Q: The ___________ will account for most of the total memory of a given PLC system.
- input image table file
- output image table file
- user program
- internal operating instructions
A: input image table file

Q: The address for the point on the I/O module shown would be:
- I:6/1
- I:1/6
- O:6/1
- O:1/6
A: I:6/1

Q: The Examine If Closed instruction:
- is also known as the Examine-On instruction
- is also known as the XIC instruction.
- looks and operates like a normally open relay contact.
A: is also known as the Examine-On instruction

Q: The output data is sent to the:
- output field devices.
- output module.
- input module.
- ladder program.
A: output field devices.

Q: The rung condition and OTE instruction are false if no logical continuity path has been established.
- True
- False
A: True

Q: The scan is normally a sequential process of:
- reading the control logic, evaluating the outputs, and updating the inputs.
- writing the control logic, evaluating the outputs, and updating the inputs.
- reading/writing the status of inputs and updating the outputs.
- reading the status of inputs, evaluating the control logic, and energizing or de-energizing the outputs.
A: reading the control logic, evaluating the outputs, and updating the inputs.

Q: The status bit of switches and pushbuttons connected to a PLC are stored in the:
- input image table file.
- output image table file.
- user program.
A: input image table file.

Q: The status of input and output devices is stored in a data table.
- True
- False
A: True

Q: The two types of patterns used to accomplish the scan function are:
- horizontal and vertical.
- left and right.
- up and down.
- input and output.
A: horizontal and vertical.

Q: The user program contains the logic that controls the machine operation.
- True
- False
A: True

Q: When the PLC is required to operate the user program without energizing any outputs, it is placed in the ________ mode.
- RUN
- CLEAR MEMORY
- PROGRAM
- TEST
A: RUN

Q: When the XIC instruction is associated with a physical input the instruction will be set to 1 when there is no input voltage applied to the terminal.
- True
- False
A: False

Q: Which of the following is a factor in determining the total scan time?
- Length of the ladder program.
- Type of instructions executed.
- Speed of the processor.
A: Length of the ladder program.