Automation System
A venturi tube:

is extremely difficult to use
is made only of metal
measures the presence of a liquid
can be used to measure gas or liquid flow rates
None of these

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Automation System
An aneroid barometer

can measure only atmospheric pressure
is very unreliable
measures pressure by sensing deflection of an evacuated chambers.
None of these
can be used to measure gas or liquid flow rates

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Automation System
The program counter:

contains the address of the next instruction to be executed
counts the number of instructions that have been executed
is where arithmetic is done in a computer.
decides which program to run
None of these

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