This set of Flexible Manufacturing System Multiple Choice Questions & Answers (MCQs) focuses on “Electric Motors”.
1. Which of the following consists of linear series of photoelectric switches?
a) Radiator Array
b) Photoelectric sensor Array
c) Bi metallic Array
d) Mutual Array
View Answer
Explanation: The device which consists of linear series of photoelectric switches is known as Photo electric sensor Array. It is a digital sensor. Radiator Array, Bi metallic Array and Mutual Array do not consist of a series of photoelectric switches.
2. Which switch consists of an emitter and a receiver that will be triggered by a light source?
a) Modulator Switch
b) Radiant Switch
c) Photoelectric Switch
d) Abstractive Switch
View Answer
Explanation: The switch which consists of an emitter and a receiver that will be triggered by a light source is known as photoelectric switch. It is a binary type of sensor and can be operated without any physical contact.
3. Which of the following measures illumination and light intensity?
a) Dynamometer
b) Modular
c) Ammeter
d) Photometer
View Answer
Explanation: The device which has the capability to measure illumination and light intensity is known as photometer. It is an analog sensor. Dynamometer, Modular and Ammeter were not used to measure illumination and light intensity.
4. Retro reflective type of photoelectric switch blocks the light beam between emitter and receiver.
a) False
b) True
View Answer
Explanation: The photoelectric switch which blocks the light beam between the emitter and receiver is known as Transmitted type of photoelectric switch. Retro reflective type of photoelectric switch does not block the light beam between emitter and receiver.
5. Which of the following produces electrical charge when the material is deformed?
a) Bimetallic Transducer
b) Modular Transducer
c) Abstractive Transducer
d) Piezoelectric Transducer
View Answer
Explanation: The device which produces electrical charge when the material is deformed is known as Piezo electric transducer. It is an analog device. Bimetallic Transducer, Modular Transducer and Abstractive Transducer do not produce electrical charge when the material is deformed.
6. Which of the following device measures resistance by means of the position of slider on resistor?
a) Resistor
b) Potentiometer
c) Radiator
d) Pyrometer
View Answer
Explanation: The device which measures the resistance by means of the position of slider on resistor is known as potentiometer. It is an analog position sensor that is available for both linear and rotational measurements.
7. Which of the following switch is triggered when a nearby object induces change in the electromagnetic field?
a) Proximity Switch
b) Dynamo Switch
c) Feeler Switch
d) Thermo Switch
View Answer
Explanation: The switch which is triggered when a nearby object induces change in the electromagnetic field is known as Proximity switch. It is type of binary sensor and it is noncontact based.
8. Which of the following temperature measuring device measure radiation in the visible and infrared range of spectrum?
a) Micro Transducer
b) Macro Transducer
c) Radiation Pyrometer
d) Float meter
View Answer
Explanation: The temperature measuring device which measures radiation in the visible and infrared range of spectrum is known as radiation Pyrometer. It is an analog based temperature measuring device.
9. Which device is used to measure angular position using a transducer that will convert location on a circular scale into rotational position?
a) Rotary Encoder
b) Buzzer Encoder
c) Fluid flow Encoder
d) Drag Encoder
View Answer
Explanation: The device which is used to measure angular position using a transducer that will convert location on a circular scale into rotational position is known as rotary encoder. It is a digital device.
10. Which of the following device is used to measure force based on the change in strain of the conducting material?
a) Plug Gauge
b) Strain Gage
c) Limit Gauge
d) Buzz Gauge
View Answer
Explanation: The device which is used to measure force based on the change in strain of the conducting material is known as strain gage. It is one of the widely used analog sensors.
11. Which of the following device indicates physical contact between two objects?
a) Moderator
b) Tactile Sensor
c) Linear Encoder
d) Insulator
View Answer
Explanation: The device which indicates the physical contact between two objects is known as Tactile Sensor. Moderator, Linear Encoder and Insulator were not used to indicate physical contact between two objects.
12. Which of the following is a temperature measuring device based on the change in electrical resistance of the semiconductor material?
a) Plug Gauge
b) LVDT
c) Hermistor
d) Thermistor
View Answer
Explanation: The temperature measuring device which is based on the change in electrical resistance of the semiconductor material is known as Thermistor. The term is the combination of thermal and resistor.
13. Which of the following is a temperature measuring device based on thermoelectric effect?
a) Dynamometer
b) Voltmeter
c) Thermocouple
d) Ammeter
View Answer
Explanation: The measuring device which is used to measure temperature based on thermoelectric effect is known as thermoelectric effect. It is an analog temperature measuring device.
14. Which produces electrical voltage proportional to rotational speed?
a) Barometer
b) Row meter
c) Tachometer
d) Thermometer
View Answer
Explanation: The device which produces electrical voltage proportional to rotational speed is known as tachometer. It can be used to measure the rotational speed of a motor. It is available in both contact and non-contact type.
15. Which of the following device can be used to either the distance or presence of an object?
a) Plug Gauge
b) Ohmmeter
c) Micrometer
d) Ultrasonic Range Sensor
View Answer
Explanation: The device which can be used either to measure the distance or presence of an object is known as ultrasonic range sensor. It functions based on the time lapse between the emission and reflection of sound pulses from the object.
16. Resistance Temperature detector is a pressure measuring device that results in increasing in resistance when the temperature is increased.
a) True
b) False
View Answer
Explanation: Resistance Temperature detector is a temperature measuring device. Resistance will increase when the temperature is increased in the system.
17. Which of the following process has to be done before using any device to ensure its transfer function?
a) Recession
b) Reverberation
c) Calibration
d) Production
View Answer
Explanation: The process which has to be done before using any device to ensure its transfer function is known as calibration. It is the process of comparing the given value to a standard value.
18. Which is defined as the gradual loss in accuracy over time?
a) Precision
b) Drift
c) Accuracy
d) Range
View Answer
Explanation: Drift is defined as the gradual loss in accuracy over time. It is one of the desirable features of a sensor. Precision, Accuracy and Range were not typically defined as the gradual loss in accuracy over time.
Sanfoundry Global Education & Learning Series – Flexible Manufacturing System.
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