Siemens Level 1 PLC #1

Front

The basic function of a PLC is to ...

Back

accept inputs, make logical decisions, and send outputs.

Front

The basic difference between a PLC and a relay control system is that

Back

one uses relay control logic and the other uses programmed instructions.

Front

Field devices refer to ...

Back

... all kind of sensors and actuators that are physically wired to PLC input/output modules.

Front

The symbol shown below in the ladder diagram ...

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... can be thought of as a contact that is usually opened.

Front

The symbol shown below in a ladder diagram represents a(n) ...

Back

... imaginary coil that, when energized, will activate a digital output contact.

Front

Determine the number of possible combinations of a six digit binary number.

Back

64 combinations

Front

A device used to convert a binary number to a 7-segment display format is

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a decoder

Front

The largest decimal number that can be represented with eleven binary bits is …

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... 2047.

Front

The binary number 1010 0111 1100 0101 can be written in hexadecimal as …

Back

A7C5

Front

The conversion of the floating point binary number 1011 1101.0110 to decimal is ...

Back

189.375