SIEMENS PLC TEST 1 EXAM 2025/2026
QUESTIONS AND ANSWERS 100% PASS
What is a programmable logic controller(PLC)? - ANS An industrial grade computer that is
capable of being programmed to perform control functions.
Which of the following is not an advantage PLC offers over conventional relay-based control
systems? - ANS Ability to Control High Voltage/Current Directly
A(n) _____ architecture design allows the system to be easily connected to devices and
programs from other manufacturers. A(n) _____ architecture makes connecting devices from
different manufacturers more challenging - ANS open | proprietary
Inputs and Outputs (I/O) are integrated into the PLC in either _____. - ANS fixed or modular
configurations
When I/O is modular, it slots into the _____. It connects to the backplane allowing the CPU to
communicate with the modules. - ANS Rack or chassis
Which of the following is a function of the Processor Module or CPU? - ANS Executes the
stored user program from memory.
Sends appropriate output commands to control devices.
pg. 1 @COPYRIGHT 2025/2026 ALLRIGHTS RESERVED
, Accepts input data from sensing devices.
Which of the following describes the function of I/O modules? - ANS Forms the interface
between the CPU and the field devices
Which of the following is not powered by the Power Supply? - ANS Field device
What are the two most common types of PLC programming devices? - ANS Laptop and
personal computers
Which of the programming languages below is the most common (often considered standard)
language used in PLC? - ANS Ladder logic
What is a Rack as defined by Siemens? - ANS A device that accommodates the modules and
connects them to each other.
What is the function of a power supply? - ANS provides the power to the CPU and the
internal circuitry of connected modules.
What type of module adapts the signals from field devices to the internal signal level? -
ANS Signal modules
In S7-300 controllers, how many I/O modules can be plugged into the central rack? - ANS 8
In newer S7-300 CPUs, the _____ is a non-volatile memory device that stores the user program
and acts as the load memory of the PLC. - ANS MMC
In S7-300 CPUs, is the MMC required to operate the unit? - ANS Yes
What is the maximum permissible current per rack? (S7-300) - ANS 1.2A
pg. 2 @COPYRIGHT 2025/2026 ALLRIGHTS RESERVED
QUESTIONS AND ANSWERS 100% PASS
What is a programmable logic controller(PLC)? - ANS An industrial grade computer that is
capable of being programmed to perform control functions.
Which of the following is not an advantage PLC offers over conventional relay-based control
systems? - ANS Ability to Control High Voltage/Current Directly
A(n) _____ architecture design allows the system to be easily connected to devices and
programs from other manufacturers. A(n) _____ architecture makes connecting devices from
different manufacturers more challenging - ANS open | proprietary
Inputs and Outputs (I/O) are integrated into the PLC in either _____. - ANS fixed or modular
configurations
When I/O is modular, it slots into the _____. It connects to the backplane allowing the CPU to
communicate with the modules. - ANS Rack or chassis
Which of the following is a function of the Processor Module or CPU? - ANS Executes the
stored user program from memory.
Sends appropriate output commands to control devices.
pg. 1 @COPYRIGHT 2025/2026 ALLRIGHTS RESERVED
, Accepts input data from sensing devices.
Which of the following describes the function of I/O modules? - ANS Forms the interface
between the CPU and the field devices
Which of the following is not powered by the Power Supply? - ANS Field device
What are the two most common types of PLC programming devices? - ANS Laptop and
personal computers
Which of the programming languages below is the most common (often considered standard)
language used in PLC? - ANS Ladder logic
What is a Rack as defined by Siemens? - ANS A device that accommodates the modules and
connects them to each other.
What is the function of a power supply? - ANS provides the power to the CPU and the
internal circuitry of connected modules.
What type of module adapts the signals from field devices to the internal signal level? -
ANS Signal modules
In S7-300 controllers, how many I/O modules can be plugged into the central rack? - ANS 8
In newer S7-300 CPUs, the _____ is a non-volatile memory device that stores the user program
and acts as the load memory of the PLC. - ANS MMC
In S7-300 CPUs, is the MMC required to operate the unit? - ANS Yes
What is the maximum permissible current per rack? (S7-300) - ANS 1.2A
pg. 2 @COPYRIGHT 2025/2026 ALLRIGHTS RESERVED
