Wireless Sensor Networks Quiz

What is the main purpose of a sensor?

• Store energy

• Transmit sound waves

• Convert physical energy to electrical energy

• Measure voltage

Which of the following is an example of a biological sensor?

• Thermometer

• Eyes

• Microphone

• GPS sensor

What is the role of signal conditioning in sensing systems?

• Data encryption

• Filtering and amplifying captured signals

• Image processing

• Reducing file size

Which device converts an analog signal to a digital signal?

• DAC

• ADC

• CPU

• Modem

Active sensors require:

• No external power

• External power supply

• Manual triggering

• Mechanical input

Which type of sensor uses change in resistance to detect a parameter?

• Capacitive sensor

• Inductive sensor

• Resistive sensor

• Piezoelectric sensor

The main purpose of a Wireless Sensor Network (WSN) is to:

• Replace wired connections

• Monitor physical environments cooperatively

• Store large amounts of data

• Replace servers

What is the main difference between single-hop and multi-hop communication?

• Number of sensors used

• Use of relays to forward data

• Frequency range

• Data rate

Which of the following standards is best suited for low-power WSNs?

• IEEE 802.11

• IEEE 802.15.4

• IEEE 802.3

• IEEE 802.16

In WSNs, idle listening refers to:

• Sensors overhearing data

• Sensors listening when no transmission occurs

• Sensors sleeping during data transmission

• Repeated data transmission