Motion Sensors MCQ’s

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This set of Mechatronics Multiple Choice Questions & Answers (MCQs) focuses on “Motion Sensors”.

1. The Samuel motion sensor works on which principle?
a) Hall effect
b) Inductive effect
c) Doppler effect
d) Capacitive Effect

2. Tomographic sensors uses which type of waves for motion detection?
a) Radio waves
b) Ultrasonic waves
c) Infrared waves
d) Microwaves

3. Which type of lens is generally used in the PIR sensors?
a) Concave lens
b) Convex lens
c) Bifocal lens
d) Fresnel Lens

4. Combined motion sensors are triggered when all the motion sensors detect a motion.
a) True
b) False

5. What is the frequency range of the ultrasonic sound waves used by the ultrasonic sensors?
a) 20000Hz to 25000Hz
b) 25KHz to 50KHz
c) 25Hz to 55Hz
d) 25Hz to 50Hz

6. RCWL- 0516 is an example of which type of sensor?
a) Infrared Sensor
b) Microwave Radar Sensor
c) Ultrasonic Sensor
d) Temperature Sensor

7. Microwave motion sensors has more area coverage than the PIR sensors.
a) True
b) False

8. PIR stands for ____
a) Passive Infrared
b) Pulsating Infrared
c) Pulsating ratio
d) Pulse is radiation

9. The distance range of detection of the PIR sensor is ________
a) 5-10 cm
b) 5-7 m
c) Up to 12 m
d) 5-12 cm

10. A car moves with a speed of 30 km/hr. What will be the speed of the same car measured by a speed sensor which is placed in a truck which is moving with a speed of 20 km/hr in the same direction?
a) 30 km/hr
b) 50 km/hr
c) 10 km/hr
d) 0 km/hr

11. A car moves with a speed of 60 km/hr. What will be the speed of the same car measured by a speed sensor which is placed in a bicycle which is moving with a speed of 12 km/hr in the opposite direction?
a) 60 km/hr
b) 72 km/hr
c) 58 km/hr
d) 48 km/hr

12. “SAW” in respect to acoustic wave technology stands for ______
a) Sound Acoustic Wave
b) Surface Acoustic Wave
c) Simple Acoustic Wave
d) Surface Acoustic Wave

13. A moving platform moves with a speed of 100 km/hr. What will be the speed of a boy who is running on it with a speed of 10 km/hr along the motion of the moving track measured by a speed sensor placed on stationary ground?
a) 150 km/hr
b) 160 km/hr
c) 110 km/hr
d) 140 km/hr

14. A moving platform moves with a speed of 80 km/hr. What will be the speed of a boy who is running on it with a speed of 20 km/hr opposite to the motion of the moving track measured by a speed sensor placed on stationary ground?
a) 50 km/hr
b) 60 km/hr
c) 100 km/hr
d) 160 km/hr

15. A car moves with a speed of 50 km/hr. What will be the speed of a stationary bicycle parked along the roadside measured by a speed sensor which is placed in the same car?
a) 50 km/hr
b) 60 km/hr
c) 0 km/hr
d) 40 km/hr

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