A transducer is a device that converts energy from one form to another. In general, a transducer converts a signal into one form of energy in one signal into another. Transducers are often used within the limits of automation, measurement and control systems, where electrical signals are converted to other physical quantities (energy, force, torque, light, movement, position, etc.). The process of converting one form of energy to another is called transduction.
Multiple choice questions (MCQ) about sensors and transducers
1-Which of the following is not covered under the mechanical energy domain?
(A distance
(B) latent heat
© Force
(D) Size
2-Which of the following form the basis of the Electric domain?
(A current
(B) Resistance
© Inductance
(All previous
3-The sensors are classified on the basis of
(A) Functions
(B) Performance
© Exit
(D) All previous
4-The following is not a static performance parameter to be studied before selecting a parameter.
(A) Rank
(B) Deviation
© Stability
(D) Error
5-The following main dynamic characteristics are usually considered in the mechatronic sensor application.
(A) Response time
(B) Rise time
© Time constant
(D) All previous
6-The ability to give the same output reading when the same input value is applied repeatedly is known as
(A) Stability
(B) Repeatability
© Accuracy
(D) Sensitivity
7-It is the ability of the sensor to indicate the same output during a period of time for a constant input.
(A) Stability
(B) Resolution
© Error
(D) impedance
8-It is the time required to reach an output value within the specified error level.
(A) Response time
(B) Rise time
© Time of establishment
(D) None of the above
9-Next is the encoded output.
(A) Modulation of the amplitude
(B) Frequency modulation
© Pulse width modulation
(D) All previous
10-Following is not an example of a transducer.
(A) analog voltmeter
(B) Thermocouple
© Photo electric cell
(D) pneumatic cylinder
11-The following is (are) type (s) of Hall effect sensors.
(A) Linear Hall effect sensor
(B) threshold hall effect sensor
© Both (A) and (B)
(D) None of the above
12-The following is (are) true for Hall effect sensors.
(A) Can operate as high frequency switches
(B) They cost less than electromechanical switches
© Are free of contact rebound problems
(D) All previous
13-A piezoelectric crystal generates voltage when subjected to ____ force.
(A) Electric
(B) Mechanic
© Gravity
(D) All previous
14 Hall effect sensors are used in
(A) Flow meter
(B) Fuel level indicator
© Both (A) and (B)
(D) None of the above
15-Any suitable wavelength drop radiation in the depletion layer of the p-n junction develops a potential difference between the junction 'is the operating principle of
(A) Hall effect sensor
(B) Proximity sensor
© Light sensor
(D) All previous