250+ TOP MCQs on Proximity Sensor and Answers

IOT Multiple Choice Questions on “Proximity Sensor”.

1. Which sensor can detect nearby objects?
a) Proximity sensor
b) Humidity sensor
c) Touch sensor
d) Pressure sensor

Answer: a
Clarification: A proximity sensor is a sensor able to detect the presence of nearby objects without any physical contact. A proximity sensor often emits an electromagnetic field or a beam of electromagnetic radiation, and looks for a change in the return signal.

2. The monitoring of machines, gears and objects are achieved by which sensor?
a) Humidity sensor
b) Proximity sensor
c) Touch sensor
d) Pressure sensor

Answer: b
Clarification: The monitoring of machines, gears and objects are achieved precisely by the IOT(INTERNET OF THINGS) wireless proximity sensors. They use in industries ranging from robotics to machine tools, from measuring instruments to assembly lines, from food sector to chemical industry, etc.

3. Which proximity sensor detects metal objects?
a) Capacitive Proximity Sensor
b) Magnetic Proximity Sensor
c) Ultrasonic Proximity Sensor
d) Inductive Proximity Sensor

Answer: d
Clarification: Different proximity sensor targets demand different sensors. The different types of proximity sensors are: Inductive, Capacitive, Ultrasonic, Photoelectric, Magnetic, etc.

4. Which proximity sensor indicates level?
a) Inductive Proximity Sensor
b) Capacitive Proximity Sensor
c) Magnetic Proximity Sensor
d) Ultrasonic Proximity Sensor

Answer: a
Clarification: Capacitive Proximity Sensor indicates level and the fill amount present in containers, behind covering. They are used to track all objects including non-metallic ones.

5. Which proximity sensors are used in automotive?
a) Inductive Proximity Sensor
b) Capacitive Proximity Sensor
c) Magnetic Proximity Sensor
d) Ultrasonic Proximity Sensor

Answer: d
Clarification: They are widely used in automotive such as parking sensors. Ultrasonic Proximity Sensors are used in automotive.

6. Which proximity sensor detects positioning of an object?
a) Inductive Proximity Sensor
b) Capacitive Proximity Sensor
c) Optical Proximity Sensor
d) Magnetic Proximity Sensor

Answer: c
Clarification: They recognize, for non-contact and precisely, the positioning of the object.

7. Are proximity sensors used in retail settings?
a) True
b) False

Answer: a
Clarification: A retailer can use a customer’s proximity to a product to send deals and coupons directly to their smart phone.

8. VCNL4100CT allows the proximity detection up to________
a) 2 meter
b) 1 meters
c) 0.5 meters
d) 1.5 meters

Answer: b
Clarification: VCNL4100CT expand the range of applications by introducing a high-power IR emitter that allows proximity detection up to one meter.

9. Which protocol is used by proximity sensor?
a) I2C
b) SPI
c) UART/USART
d) CAN

Answer: a
Clarification: Microcontroller communication is via standard I2C, where the host can set measurement parameters and request results. If desired, programmable threshold allow the VCNL4100 to interrupt the host once threshold values are crossed, thereby minimizing device polling.

10. Does proximity sensor have a temperature sensor in it?
a) True
b) False

Answer: a
Clarification: A buit-in temperature sensor is used by the signal processing circuitry to provide stable outputs across the temperature range -40 ^oC to +85^oC.

11. Which device generates output signal when metal objects are either inside or entering into sensing area.
a) Capacitive Proximity
b) Magnetic Proximity
c) Inductive proximity
d) Parallel Proximity

Answer: a
Clarification: Device which generates output signal electrical signal when metal objects are either inside or entering into its sensing area from an direction.

12. ________ detects metals but along with it can also detect resins, liquids.
a) Inductive proximity
b) Capacitive Proximity
c) Magnetic Proximity
d) Parallel Proximity

Answer: b
Clarification: Capacitive Proximity can also detect metals but along with it can also detect resins, liquids, powders, etc. This sensor working can vary accordingly covering material, cable longness, noise sensitivity.

13. _________ sensors have no electrical noise effect and it can work DC.
a) Inductive proximity
b) Capacitive Proximity
c) Magnetic Proximity
d) Parallel Proximity

Answer: c
Clarification: Magnetic proximity sensors have no electrical noise effect and it can work on DC, AC, AC/DC.

14. What is the sensing range for magnetic proximity sensors?
a) 120mm
b) 90mm
c) 150mm
d) 100mm

Answer: a
Clarification: Magnetic proximity sensors have no electrical noise effect and it can work on DC, AC, AC/DC. These types of sensors have highest sensing range upto 120mm.

15. What is the sensing range for capacitive proximity sensors?
a) 150mm
b) 25mm
c) 120mm
d) 100mm

Answer: c
Clarification: Capacitive Proximity can also detect metals but along with it can also detect resins, liquids, powders, etc. This sensor working can vary accordingly covering material, cable longness, noise sensitivity.Its maximum range of sensing is 25mm.