SIEMENS LEVEL 1 EXAM 2025
QUESTIONS AND ANSWERS
What is the basic function of a PLC? - ANS Accept inputs, make logical decisions, and send
outputs
What is the basic difference between a PLC and a relay control system? - ANS One uses relay
control logic and the other uses programmed instructions.
Field devices refer to... - ANS All kinds of sensors and actuators that are physically wired to
PLC input/output modules.
A contact that is usually opened will look like... - ANS -I I-
An imaginary coil that, when energized, will activate a digital output contact looks like... -
ANS -( )-
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, A device used to convert a binary number to a 7-segment display format is... - ANS Decoder
The largest number that can be represented with eleven binary bits is... - ANS 2047
The binary number 1010 0111 1100 0101 can be written in hexadecimal as... - ANS A7C5
The conversion of the decimal number 156 to 8421 BCD is... - ANS 0001 0101 0110
If a given memory unit consists of 2,400 bytes the memory capacity would be rated... -
ANS 2,400 bytes * 8= 19,200 bits
What is true about a NAND gate? - ANS If all inputs are 0, the output will be 1.
If one or more inputs are 0 the output will be 1.
If you want to know when one or both matching bits in two different words are logic '1' you
would use the... - ANS XOR instruction
COPYRIGHT © 2025 FYNDLAY ALL RIGHTS RESERVED 2
QUESTIONS AND ANSWERS
What is the basic function of a PLC? - ANS Accept inputs, make logical decisions, and send
outputs
What is the basic difference between a PLC and a relay control system? - ANS One uses relay
control logic and the other uses programmed instructions.
Field devices refer to... - ANS All kinds of sensors and actuators that are physically wired to
PLC input/output modules.
A contact that is usually opened will look like... - ANS -I I-
An imaginary coil that, when energized, will activate a digital output contact looks like... -
ANS -( )-
COPYRIGHT © 2025 FYNDLAY ALL RIGHTS RESERVED 1
, A device used to convert a binary number to a 7-segment display format is... - ANS Decoder
The largest number that can be represented with eleven binary bits is... - ANS 2047
The binary number 1010 0111 1100 0101 can be written in hexadecimal as... - ANS A7C5
The conversion of the decimal number 156 to 8421 BCD is... - ANS 0001 0101 0110
If a given memory unit consists of 2,400 bytes the memory capacity would be rated... -
ANS 2,400 bytes * 8= 19,200 bits
What is true about a NAND gate? - ANS If all inputs are 0, the output will be 1.
If one or more inputs are 0 the output will be 1.
If you want to know when one or both matching bits in two different words are logic '1' you
would use the... - ANS XOR instruction
COPYRIGHT © 2025 FYNDLAY ALL RIGHTS RESERVED 2
