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Most analog sensors produce strong signals.

A) True
B) False

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False

Try to run signal wiring as far away from power wiring as possible.

A) True
B) False

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Many of the programmable controllers found in industry are designed to accept analog as well as digital inputs.

A) True
B) False

Correct Answer

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True

Analog sensors are often used with ____ that can be used to trigger alarms and turn on or off certain processes.


A) programmable valves
B) actuators
C) set point detectors
D) variable switches

E) A) and C)
F) A) and D)

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C

When an analog input is used, such as a thermocouple for measuring temperature, a special module that mounts on the ____ is used.


A) power supply
B) internal relay
C) cable
D) I/O rack

E) None of the above
F) B) and C)

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The differential amplifier detects the voltage difference between the pair of signal wires and amplifies this difference.

A) True
B) False

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The Mylar foil type of shielded cable can provide a noise reduction ratio of about ____.


A) 5,000:1
B) 10,000:1
C) 20,000:1
D) 30,000:1

E) None of the above
F) A) and B)

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Common coaxial cable offers ____.


A) very poor noise reduction
B) similar levels of noise reduction as shielded cable
C) good noise reduction
D) the best noise reduction

E) A) and B)
F) All of the above

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Ground levels of all equipment must be the same voltage in order to be used.

A) True
B) False

Correct Answer

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An electronic device that is often used to help overcome the problem of ____ is the differential amplifier.


A) induced noise
B) static interference
C) harmonic distortion
D) spikes

E) None of the above
F) A) and B)

Correct Answer

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