PLC TEST 1 10/31/19 EXAM QUESTIONS
AND ANSWERS LATEST UPDATE 2025
RATED A+ FOR SUCCESS.
, If all the units are in one fixed enclosure, the PLC is called a _______ PLC -
ANSWERfixed
The four major components of a PLC power supply are a line conditioner or varistor,
transformer/rectifier unit, RC filter, and _______ - ANSWERfixed plc
A(n) ________ is a semiconductor device that can maintain a steady voltage level -
ANSWERzener diode
The section of the PLC system memory that holds the status of discrete input ports is
the ______ status - ANSWERinput
A ______ converts the digital output signals back to analog signals - ANSWERdigital-to-
analog converter
The _______ segments holds the ladder logic program - ANSWERuser memory
T or F. One benefit of PLCs over electromechanical relay logic systems is PLCs require
minor wiring and can be modified and reprogrammed within a few hours - ANSWERtrue
T or F. Discrete input ports are ports that are either open (off) or closed (on) -
ANSWERtrue
T or F. Static RAM (SRAM) stores data in the form of charge on capacitors -
ANSWERfalse
T or F. Read only memory (ROM) holds the permanent system programs -
ANSWERtrue
T or F. The arithmetic logic unit (ALU) carries out math and logic instructions -
ANSWERtrue
T or F. Microprocessor units (MPUs) use an octal transciever to enable ROM,RAM,I/O
port devices,and support chips - ANSWERfalse
T or F. When selecting PLCs that meet your needs, you should consider manufacturer's
support, serviceability, and programming software - ANSWERtrue
T or F. The user memory segment stores information needed to execute the user
program - ANSWERfalse
AND ANSWERS LATEST UPDATE 2025
RATED A+ FOR SUCCESS.
, If all the units are in one fixed enclosure, the PLC is called a _______ PLC -
ANSWERfixed
The four major components of a PLC power supply are a line conditioner or varistor,
transformer/rectifier unit, RC filter, and _______ - ANSWERfixed plc
A(n) ________ is a semiconductor device that can maintain a steady voltage level -
ANSWERzener diode
The section of the PLC system memory that holds the status of discrete input ports is
the ______ status - ANSWERinput
A ______ converts the digital output signals back to analog signals - ANSWERdigital-to-
analog converter
The _______ segments holds the ladder logic program - ANSWERuser memory
T or F. One benefit of PLCs over electromechanical relay logic systems is PLCs require
minor wiring and can be modified and reprogrammed within a few hours - ANSWERtrue
T or F. Discrete input ports are ports that are either open (off) or closed (on) -
ANSWERtrue
T or F. Static RAM (SRAM) stores data in the form of charge on capacitors -
ANSWERfalse
T or F. Read only memory (ROM) holds the permanent system programs -
ANSWERtrue
T or F. The arithmetic logic unit (ALU) carries out math and logic instructions -
ANSWERtrue
T or F. Microprocessor units (MPUs) use an octal transciever to enable ROM,RAM,I/O
port devices,and support chips - ANSWERfalse
T or F. When selecting PLCs that meet your needs, you should consider manufacturer's
support, serviceability, and programming software - ANSWERtrue
T or F. The user memory segment stores information needed to execute the user
program - ANSWERfalse
