Instrumentation Transducers

Inductive Transducers

Question 1
Marks : +2 | -2
Pass Ratio : 50%
Which of the following represents the application of inductive transducers?
Displacement measurement
Thickness measurement
Both displacement and thickness measurement
None of the mentioned
Explanation:
Inductive transducers can be used for measuring displacement and thickness of thin plate etc.
Question 2
Marks : +2 | -2
Pass Ratio : 50%
Inductive potentiometers are used to measure ________________
Voltage
Current
Displacement
None of the mentioned
Explanation:
It has same function as linear potentiometers and is used for measuring displacement.
Question 3
Marks : +2 | -2
Pass Ratio : 50%
For thickness measurement, the material should have constant permeability and resistivity.
True
False
Explanation:
Material used for thickness measurement should have constant permeability and resistivity since properties of material should not change while measurement.
Question 4
Marks : +2 | -2
Pass Ratio : 50%
Which of the following is correct for synchro?
Transformer type displacement transducer
Inductive type displacement transducer
Capacitive type displacement transducer
Resistive type displacement transducer
Explanation:
They develop induced emf related to the angular position of rotor, hence they are known as transformer type displacement transducer.
Question 5
Marks : +2 | -2
Pass Ratio : 50%
Push-pull coil system is used for ________________
Providing constant permeability
Minimize electromagnetic force of attraction
Provide immunity from external magnetic effect
All of the mentioned
Explanation:
Push-pull system is a special type of coil system which has many advantages.
Question 6
Marks : +2 | -2
Pass Ratio : 50%
Which of the following device can be used for measuring relative angular displacement between two systems?
Tachometer
Synchro
Speedo meter
None of the mentioned
Explanation:
Synchro is a device used for measuring angular displacement between two systems, usually in a machine between two shafts.
Question 7
Marks : +2 | -2
Pass Ratio : 50%
Which of the following represents drawback of the inductive transducer for displacement measurement?
Act of electromagnetic force of attraction
Lower sensitivity
Requirement of large displacement
None of the mentioned
Explanation:
Electromagnetic force of attraction is acted on moving core, and hence displacement source has to overcome this force.
Question 8
Marks : +2 | -2
Pass Ratio : 50%
Which of the following represents materials used for thickness measurement using inductive transducer?
Material should be magnetic in nature
Material should be magnetic and conducting
Material should be magnetic and non-conducting
All of the mentioned
Explanation:
Commonly all type of magnetic materials can be used for thickness measurement using inductive transducers.
Question 9
Marks : +2 | -2
Pass Ratio : 50%
Which of the following is correct for toroid type coils?
Toroid can be used for measurement of displacement
Toroid cannot be used for measuring displacement
Toroid can be used for measuring both displacement and velocity
None of the mentioned
Explanation:
Toroid cannot be used for measuring linear displacement due to its shape.
Question 10
Marks : +2 | -2
Pass Ratio : 50%
Closely wound toroid coils are better than solenoid coil.
True
False
Explanation:
Closely wound toroid coils provide independence from the effect of an external magnetic field.