WorksheetsIoT-Topic 4 Sensors and Outputs
Total questions: 13
Worksheet time: 6mins
Name
Class
Date
1.
How many types of electronic sensors are there?
a)
One
b)
Two
c)
Three
d)
Four
2.
A sensor is a
a)
subsystem.
b)
machine.
c)
module.
d)
All of the above.
3.
The function of a sensor is to
a)
a. detect events within specified environment
b)
b. separate physical parameters
c)
c. track and transfer data to computer processor.
d)
both a and c
4.
What kind of signals are generated by analog sensors?
a)
a. Discrete
b)
b. Continuous
c)
Both a and b
d)
None of the above
5.
What are the two groups of humidity sensors?
a)
Relative and Absolute
b)
Relative and Resistive.
c)
Capacitive and Absolute
d)
Relative and Capacitive.
6.
A relative humidity sensor uses which property as a reference to get a relative humidity reading?
a)
Temperature
b)
Capacitance.
c)
Resistance
d)
Humidity
7.
Ultrasonic sensor works similar to
a)
a. sonar.
b)
b. radar.
c)
c. UV
d)
both a and b.
8.
TMP36 is an example of
a)
Temperature
b)
Light
c)
PIR
d)
IR
9.
Which of the following are humidity sensors?
a)
a. DHT11
b)
b. DHT22
c)
c. DHT55
d)
both a and b.
10.
An object is detected by an ultrasonic sensor. The time taken from the transmission to reception of reflected waves is 800 μs. Given the speed of sound is 0.0343 cm/μs, calculate the distance of the object.
a)
27.44 cm
b)
27.44 m
c)
1.372 cm
d)
0.1372 m
11.
Which one of the following is NOT a display device?
a)
Servo Motor
b)
LED
c)
OLED
d)
LCD
12.
Which statement about LEDs is correct?
a)
They can only produce one color, red.
b)
They make use of reflectors to show an image.
c)
WIth different bandgaps and photon energy, they can produce different colors.
d)
They produce better quality images compared to an OLED.
13.
Which communication protocol uses peripheral (slave) and controller (master) techniques?
a)
I2C
b)
GPIO
c)
HTTP
d)
HDMI
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