This set of Flexible Manufacturing System Multiple Choice Questions & Answers (MCQs) focuses on “Sensors”.
1. Which is a device that is used to convert physical variable from one form to another form for a given application?
a) Radiator
b) Transducer
c) Regulator
d) Modulator
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Explanation:The device which is used to convert a physical variable from one form to another form for a given application. It triggers the actual device in the system to perform its function.
2. Which is a device that converts a physical stimulus or variable into a more convenient form?
a) Modulator
b) Radiator
c) Sensor
d) Aviator
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Explanation: The device which is used to convert a physical stimulus or variable into a more convenient form is known as sensor. The variable of interest may be temperature, pressure or force.
3. Which type of sensor produces continuous analog signal?
a) Digital Sensor
b) Modular Sensor
c) Analog Sensor
d) Variant Sensor
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Explanation: The type of sensor which is used to produce continuous analog signal is known as analog sensor. The values measured will vary in an analogous manner.
4. Which type of sensors produces an output that has only certain values?
a) Discrete Sensor
b) Modular Sensor
c) Analog Sensor
d) Polar Sensor
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Explanation: The type of sensors produces an output that has only certain values is known as discrete sensors. Modular Sensor, Analog Sensor and Polar Sensor do not produce an output that has only certain values.
5. Which type of sensors produces an ON/OFF signal?
a) Binary Sensor
b) Modular Sensor
c) Analog Sensor
d) Polar Sensor
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Explanation: The type of sensors produces an ON/OFF signal is known as binary sensor. It can be used in electrical circuit to ensure that the circuit is closed. Modular Sensor, Analog Sensor and Polar Sensor do not produce an ON/OFF signal.
6. Which type of sensors produces output in the form of a set of parallel status bits?
a) Binary Sensor
b) Digital Sensor
c) Analog Sensor
d) Polar Sensor
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Explanation: The type of sensors which produces output in the form of a set of parallel status bits is known as digital sensor. Some models of this type produce a series of pulses that will be counted.
7. Which are becoming common these days with its capability to easily read when used as a standalone measuring instrument?
a) Bipolar Transducer
b) Digital Transducer
c) Polar Transducer
d) Analog Transducer
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Explanation: The transducers which are becoming common these days with its capability to easily read when used as a standalone measuring instrument is the digital transducers. They are also easily compatible with the digital computers.
8. Which sensors have the physical features with dimensions in the micron range?
a) Micro sensor
b) Macro sensor
c) Polar sensor
d) Bipolar sensor
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Explanation: The sensors which have the physical features with dimensions in the micron range are known as micro sensor. They should be handled with precautions and it is very delicate instrument.
9. Which processing techniques are used fabricating micro sensors?
a) Helium
b) Silicon
c) Vanadium
d) Iridium
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Explanation: Silicon processing techniques are used in the fabrication of micro sensors. These techniques are associated with integrated circuit manufacturing.
10. Which type of sensor responds to an external stimulus without an external power?
a) Translucent Sensor
b) Active Sensor
c) Transparent Sensor
d) Passive Sensor
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Explanation: The type of sensor responds to an external stimulus without an external power supply is known as Active Sensor. The output variable will be directly proportional to the process parameter.
11. Which category of physical variable does force, stress and strain fall under?
a) Magnetic
b) Mechanical
c) Chemical
d) Electrical
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Explanation: The physical variables such as force, stress and strain fall under the category of mechanical variables.
12. Which category of physical variable does voltage, current and resistance fall under?
a) Magnetic
b) Mechanical
c) Chemical
d) Electrical
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Explanation: The physical variables such as voltage, current and resistance fall under the category of electrical variables.
13. Which of the following does not belong to the category of magnetic physical variable?
a) Magnetic flux
b) Magnetic conductivity
c) Wavelength
d) Permeability
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Explanation: Wavelength does not belong to the category of magnetic physical variable. Magnetic flux, magnetic conductivity and permeability belong to magnetic physical variable.
14. Which category of physical variable does specific heat and temperature fall under?
a) Thermal
b) Mechanical
c) Chemical
d) Electrical
View Answer
Explanation: The physical variables such as specific heat and temperature fall under the category of thermal physical variables.
15. Which category of physical variable does pH level and concentration fall under?
a) Thermal
b) Mechanical
c) Chemical
d) Electrical
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Explanation: The physical variables such aspH level and concentration fall under the category of chemical variables.
16. Which type of sensor requires an external power source to operate?
a) Translucent Sensor
b) Active Sensor
c) Transparent Sensor
d) Passive Sensor
View Answer
Explanation: The type of sensor which requires an external power supply is known as Passive Sensor. In order to operate this sensor, electric current need to be passed through it.
17. Which function establishes the relation between the value of the physical stimulus and the value of the signal produced by the sensor?
a) Stimulus Function
b) Value Function
c) Signal Function
d) Transfer Function
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Explanation: The function which establishes the relation between the value of the physical stimulus and the value of the signal produced by the sensor is known as transfer function. It is a measure of operation of the sensor.
18. Stimulus is the output generated by the sensor.
a) True
b) False
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Explanation: Stimulus will be the input to the sensor. Signal generated will be the output of the sensor.
19. Which of the following is not an analog sensor?
a) Thermocouple
b) Strain gauge
c) Optical Encoder
d) Potentiometer
View Answer
Explanation: Optical encoder is not an analog sensor. Thermocouple, Strain gauge and Potentiometer are the different analog sensors.
20. Output from an analog device is converted using DAC device.
a) True
b) False
View Answer
Explanation: Output from an analog device is converted using ADC device. Since, the output from an analog device is analog. It needs to be converted to digital. Hence, analog to digital converters are typically used.
Sanfoundry Global Education & Learning Series – Flexible Manufacturing System.
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