Siemens Level 1 PLC #1
Authored by Nareshbabu G
Professional Development
University - Professional Development
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39 questions
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1.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
The basic function of a PLC is to ...
... amplify various weak signal sources
... control the speed of motors
... accept inputs, make logical decisions, and send outputs.
... control a high voltage output with a low voltage input.
... convert nonelectrical quantities into electrical voltage.
2.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
The basic difference between a PLC and a relay control system is that
… different types of input devices are used.
… different types of output devices are used.
… different input and output voltage levels are used.
… one uses analog signals and the other uses digital signals.
… one uses relay control logic and the other uses programmed instructions.
3.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
Field devices refer to ...
... input devices only.
... output devices only.
... load devices only.
... power devices only.
... all kind of sensors and actuators that are physically wired to PLC input/output modules.
4.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
The symbol shown below in the ladder diagram ...
... can be thought of as a contact that is usually closed.
... can be thought of as a contact that is usually opened.
... represents a capacitor.
... is always a logic 0.
... is always a logic 1.
5.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
The symbol shown below in a ladder diagram represents a(n) ...
... set of usually open contacts.
... imaginary coil that, when energized, will activate a digital output contact.
... a capacitor.
... is always a logic 0.
... is always a logic 1.
6.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
Determine the number of possible combinations of a six digit binary number.
6 combinations
16 combinations
32 combinations
64 combinations
128 combinations
7.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
A device used to convert a binary number to a 7-segment display format is
... a decoder
... a comparator
... a multiplexer
... a de-multiplexer
... an analog to digital converter
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