MMSC Maintenance test ACTUAL
QUESTIONS AND CORRECT ANSWERS
Which PLC enclosure allows for the most expansion of I/O modules?
- Brick style
- Interior chassis
- I/O chassis style
- Anchor mount - CORRECT ANSWERS✅✅I/O chassis style
What is the most basic operation of a PLC?
- Controlling machine sequence
- Controlling conveyor systems
- Controlling solenoid valves
- Operating solenoid valves - CORRECT ANSWERS✅✅Controlling machine sequence
Once the project is downloaded into the PLC's memory, what is the next step of operation?
- Place the PLC in ACCEPT mode
- Place the PLC in DOWNLOAD mode
- Place the PLC in TEST mode
- Place the PLC in RUN mode - CORRECT ANSWERS✅✅Place the PLC in RUN mode
How does a PLC control different types of machines and processes?
- By programming
- By moving wires
- By wireless control
- By Bluetooth - CORRECT ANSWERS✅✅By programming
Which PLC Program Language evolved from the computer language Pascal?
- Instruction list
- Structure text
,- Sequential Function Chart
- Ladder Logic - CORRECT ANSWERS✅✅Structure text
PLC executes a 3-step process called scan cycle. Scan cycle includes Input scan and Output
scan, what is the third step?
- Process scan
- Program scan
- Feedback scan
- Message scan - CORRECT ANSWERS✅✅Program scan
A PLC is classified by their enclosure. What is the other enclosure besides I/O chassis?
- Anchor mount
- Interior chassis
- Brick style
- Interior mount - CORRECT ANSWERS✅✅Brick style
Which PLC Program Language resembles rungs of a ladder?
- Instruction list
- Structure text
- Sequential Function Chart
- Ladder Logic - CORRECT ANSWERS✅✅Ladder Logic
Which PLC program has parallel rungs like a wiring drawing?
- Instruction list
- Structure text
- Sequential Function Chart
- Ladder Logic - CORRECT ANSWERS✅✅Ladder Logic
The Rockwell CCW program has seven components including: menu bar, toolbar, and status
bar. What is the name of another component?
- Toolbox
, - Flat bar
- Crow bar
- Programming bar - CORRECT ANSWERS✅✅Toolbox
The following graphic shows an example of what type of logic element?
- AND
- OR
- NAND
- NOR - CORRECT ANSWERS✅✅AND
These PLC instructions control a switch inside the PLC's output module or main enclosure
that turns power on or off at an output terminal.
- Reverse coil
- Output coil
- Input coil
- Direct coil - CORRECT ANSWERS✅✅Output coil
Every PLC address identifies a location here, where the status of an input, output (memory or
other instruction status) is stored.
- Input
- Output
- Memory
- Terminal - CORRECT ANSWERS✅✅Memory
What are input and output terminals that never change called?
- Absolute addresses
- Dynamic addresses
- Permanent addresses
- Terminal addresses - CORRECT ANSWERS✅✅Absolute addresses
What does the abbreviation NC stand for?
QUESTIONS AND CORRECT ANSWERS
Which PLC enclosure allows for the most expansion of I/O modules?
- Brick style
- Interior chassis
- I/O chassis style
- Anchor mount - CORRECT ANSWERS✅✅I/O chassis style
What is the most basic operation of a PLC?
- Controlling machine sequence
- Controlling conveyor systems
- Controlling solenoid valves
- Operating solenoid valves - CORRECT ANSWERS✅✅Controlling machine sequence
Once the project is downloaded into the PLC's memory, what is the next step of operation?
- Place the PLC in ACCEPT mode
- Place the PLC in DOWNLOAD mode
- Place the PLC in TEST mode
- Place the PLC in RUN mode - CORRECT ANSWERS✅✅Place the PLC in RUN mode
How does a PLC control different types of machines and processes?
- By programming
- By moving wires
- By wireless control
- By Bluetooth - CORRECT ANSWERS✅✅By programming
Which PLC Program Language evolved from the computer language Pascal?
- Instruction list
- Structure text
,- Sequential Function Chart
- Ladder Logic - CORRECT ANSWERS✅✅Structure text
PLC executes a 3-step process called scan cycle. Scan cycle includes Input scan and Output
scan, what is the third step?
- Process scan
- Program scan
- Feedback scan
- Message scan - CORRECT ANSWERS✅✅Program scan
A PLC is classified by their enclosure. What is the other enclosure besides I/O chassis?
- Anchor mount
- Interior chassis
- Brick style
- Interior mount - CORRECT ANSWERS✅✅Brick style
Which PLC Program Language resembles rungs of a ladder?
- Instruction list
- Structure text
- Sequential Function Chart
- Ladder Logic - CORRECT ANSWERS✅✅Ladder Logic
Which PLC program has parallel rungs like a wiring drawing?
- Instruction list
- Structure text
- Sequential Function Chart
- Ladder Logic - CORRECT ANSWERS✅✅Ladder Logic
The Rockwell CCW program has seven components including: menu bar, toolbar, and status
bar. What is the name of another component?
- Toolbox
, - Flat bar
- Crow bar
- Programming bar - CORRECT ANSWERS✅✅Toolbox
The following graphic shows an example of what type of logic element?
- AND
- OR
- NAND
- NOR - CORRECT ANSWERS✅✅AND
These PLC instructions control a switch inside the PLC's output module or main enclosure
that turns power on or off at an output terminal.
- Reverse coil
- Output coil
- Input coil
- Direct coil - CORRECT ANSWERS✅✅Output coil
Every PLC address identifies a location here, where the status of an input, output (memory or
other instruction status) is stored.
- Input
- Output
- Memory
- Terminal - CORRECT ANSWERS✅✅Memory
What are input and output terminals that never change called?
- Absolute addresses
- Dynamic addresses
- Permanent addresses
- Terminal addresses - CORRECT ANSWERS✅✅Absolute addresses
What does the abbreviation NC stand for?
