Robotics

Question 1

1An ultrasonic pulse returns to the sensor after 0.002 s. If sound travels at 340 m/s, how far away is the obstacle?

Medium

A. 680 m B. 0.68 m C. 0.34 m D. 0.17 m

Question 2

2Sensor fusion combines

Hard

A. battery cells B. programs and wheels C. two motors D. data from several sensors for better estimates

Question 3

3An encoder on a motor measures

Easy

A. how far the shaft has turned B. light C. temperature D. air pressure

Question 4

4A sensor used to follow a black line on a white floor is an

Easy

A. ultrasonic sensor B. temperature sensor C. microphone D. infrared (IR) reflectance sensor

Question 5

5A 10-bit ADC with a 5 V reference has a resolution of about

Hard

A. 4.9 mV B. 1 mV C. 0.5 V D. 50 mV

Question 6

6A touch (bump) sensor detects

Easy

A. light B. temperature C. sound D. physical contact

Question 7

7An ultrasonic sensor measures distance by

Easy

A. timing the echo of sound waves B. measuring light colour C. weighing objects D. detecting heat

Question 8

8A robot that uses a camera to recognise objects is using

Easy

A. pneumatics B. computer vision C. soldering D. hydraulics

Question 9

9A PIR sensor detects

Easy

A. colour B. infrared radiation from warm bodies such as people C. sound D. magnetic fields

Question 10

10An ultrasonic sensor measures

Easy

A. light intensity B. temperature C. distance, using sound echoes D. colour