ABSA 4A Unit 9 – Instrumentation and Control Systems Practice Questions with Verified Answers

ABSA 4A UNIT 9 questions with accurate answers
A _______ is NOT a discrete input.


Select one:
a. limit switch
b. proximity switch
c. push button
d. temperature sensor Ans✓✓✓ d. temperature sensor


A circular chart recorder:


Select one:
a. Provides a different function than a strip chart.
b. Is newer design than a strip chart.
c. Incorporates a bourdon tube.
d. Does not provide a permanent record. Ans✓✓✓ c. Incorporates a
bourdon tube.


A control device which will change one form of energy into another
form of energy is the:


Select one:
a. Logic device

, b. Primary element
c. Transducer
d. Transmitter Ans✓✓✓ c. Transducer


A DC motor used to provide precise repeatable positioning of valves or
dampers is the


Select one:
a. solenoid
b. modulating motor
c. Wheatstone bridge
d. stepper motor Ans✓✓✓ d. stepper motor


A helix strip bimetallic thermometer is wound spirally to:


Select one:
a. Dampen the motion of the pointer
b. Ease its installation
c. Increase the range of temperature it can measure
d. Amplify the motion of the pointer Ans✓✓✓ d. Amplify the motion
of the pointer


A PLC with an HMI can signal an alarm by: (choose all that are correct)