Which of the following statements is true of the line-following sensor?

Uses an LED and a photo detector to see the line.

_______ sensors have the ability to return a(n) ________ of values.

analog, range, digital, binary set

Suppose you found that your line-following reads 50 off the line and 100 on the line.

75 would be a good threshold value

An autonomous robot ____________.

uses sensors to provide feedback

The VEX Ultrasonic Sensor is connected to:

A digital output and an interrupt port.

All Mars Rovers have needed autonomous driving functions because:

radio signals can take up to 20 minutes to get to Mars

A system such as the one pictured below which uses operator control to move hazardous materials

is an example of an open loop control system.

Which factor does NOT affect the speed of sound?

The sound amplitude (loudness) and frequency.

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Robotic SENSORS (REC UNIT 4) CPAS Review

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Robotic Sensors (MS Engineering CPAS Prep); emphasizes Learnmate REC Unit 4 content.

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Questions 15

Answers

1
Digital sensors _______________.
do not work on robots with analog sensors
can be only ON or OFF
are always on in easyC
have a variety of values
2
Which of the following statements is true of the line-following sensor?
Returns on/off (digital) value to indicate on/off the line.
Is always plugged into motor port three (3).
Uses an LED and a photo detector to see the line.
Uses ambient light with a detector to see the line.
3
_______ sensors have the ability to return a(n) ________ of values.
digital, range
analog, range
analog, binary set
digital, binary set
4
Suppose you found that your line-following reads 50 off the line and 100 on the line.
60 would be a good threshold value
25 would be a good threshold value
150 would be a good threshold value
75 would be a good threshold value
5
An autonomous robot ____________.
has wheels
uses sensors to provide feedback
strongly resembles an automobile
is controlled by remote control
6
A(n) ______ uses a disk with pie shaped wedges and optical sensor to measure distance.
global positioning system
potentiometer
compass
encoder
7
Most garage doors utilize a(n) ________ to tell the controller when the door is fully open.
bump switch
ultraviolet LED and detector
limit switch
ultrasonic sensor
8
The VEX Ultrasonic Sensor is connected to:
An analog input and an interrupt port.
A digital output and an interrupt port.
The Rx1 and/or the Rx2 ports.
An analog input and a digital output.
9
A(n) _______ is a sensor that reports the rate of change in the speed of a moving object.
accelerometer
ultrasound
contagion
potentiometer
10
All Mars Rovers have needed autonomous driving functions because:
radio signals can take up to 20 minutes to get to Mars
artificial intelligence of NASA robots is better than humans
the terrain makes remote control driving impossible
joystick technology is not sensitive enough for fine control
11
A system such as the one pictured below which uses operator control to move hazardous materials
is an example of an open loop control system.
is an example of a continuous loop control system.
is an example of a closed loop control system.
is an example of an extraneous loop mechanism.
12
In general, sensors provide ______ to a program via the controller.
programming
error messages
code
feedback
13
All autonomous robots have the following capabilities; which one must the robot perform first?
Action
Combustion
Interpretation
Sensing
14
If the speed of a sonar ping in water is 1500 m/sec and a ping takes 300 ms to return to a sub
225 m
450 m
the target is 112.5 m
300 m
15
Which factor does NOT affect the speed of sound?
The temperature of the medium through which it travels.
The sound amplitude (loudness) and frequency.
In air, the altitude above sea level..
The type of material through which the sound is traveling.

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