This set of Instrumentation Transducers Multiple Choice Questions & Answers (MCQs) focuses on “Inductive Transducers”.
1. Which of the following represents drawback of the inductive transducer for displacement measurement?
a) Act of electromagnetic force of attraction
b) Lower sensitivity
c) Requirement of large displacement
d) None of the mentioned
View Answer
Explanation: Electromagnetic force of attraction is acted on moving core, and hence displacement source has to overcome this force.
2. Which of the following represents the application of inductive transducers?
a) Displacement measurement
b) Thickness measurement
c) Both displacement and thickness measurement
d) None of the mentioned
View Answer
Explanation: Inductive transducers can be used for measuring displacement and thickness of thin plate etc.
3. Push-pull coil system is used for ________________
a) Providing constant permeability
b) Minimize electromagnetic force of attraction
c) Provide immunity from external magnetic effect
d) All of the mentioned
View Answer
Explanation: Push-pull system is a special type of coil system which has many advantages.
4. Closely wound toroid coils are better than solenoid coil.
a) True
b) False
View Answer
Explanation: Closely wound toroid coils provide independence from the effect of an external magnetic field.
5. Which of the following is correct for toroid type coils?
a) Toroid can be used for measurement of displacement
b) Toroid cannot be used for measuring displacement
c) Toroid can be used for measuring both displacement and velocity
d) None of the mentioned
View Answer
Explanation: Toroid cannot be used for measuring linear displacement due to its shape.
6. Which of the following represents materials used for thickness measurement using inductive transducer?
a) Material should be magnetic in nature
b) Material should be magnetic and conducting
c) Material should be magnetic and non-conducting
d) All of the mentioned
View Answer
Explanation: Commonly all type of magnetic materials can be used for thickness measurement using inductive transducers.
7. Which of the following device can be used for measuring relative angular displacement between two systems?
a) Tachometer
b) Synchro
c) Speedo meter
d) None of the mentioned
View Answer
Explanation: Synchro is a device used for measuring angular displacement between two systems, usually in a machine between two shafts.
8. Which of the following is correct for synchro?
a) Transformer type displacement transducer
b) Inductive type displacement transducer
c) Capacitive type displacement transducer
d) Resistive type displacement transducer
View Answer
Explanation: They develop induced emf related to the angular position of rotor, hence they are known as transformer type displacement transducer.
9. For thickness measurement, the material should have constant permeability and resistivity.
a) True
b) False
View Answer
Explanation: Material used for thickness measurement should have constant permeability and resistivity since properties of material should not change while measurement.
10. Inductive potentiometers are used to measure ________________
a) Voltage
b) Current
c) Displacement
d) None of the mentioned
View Answer
Explanation: It has same function as linear potentiometers and is used for measuring displacement.
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