Lecture 14

What type of wave is sound classified as?

• Transverse wave

• Longitudinal wave

• Surface wave

• Electromagnetic wave

What is the speed of sound in air at 0°C?

• 331.5 m/s

• 343 m/s

• 299.7 m/s

• 300 m/s

What does amplitude measure in a sound wave?

• Maximum displacement of particles

• Wavelength of the wave

• Speed of the wave

• Frequency of the wave

What is the unit of frequency?

• Joule (J)

• Newton (N)

• Hertz (Hz)

• Decibel (dB)

What is infrasound?

• Sound at 100 Hz

• Sound at 1 kHz

• Sound above 20,000 Hz

• Sound below 20 Hz

Which of the following is a characteristic of digital signals?

• Continuous values

• Discrete values

• Analog representation

• Variable amplitude

What is the primary function of a Building Management and Control System (BMCS)?

• Control HVAC systems

• Monitor security systems

• Manage lighting systems

• Control fire alarms

What does a modem do?

• Amplifies sound

• Converts digital signals to analog

• Stores data

• Transmits video signals

What is the purpose of a temperature sensor?

• To measure sound levels

• To monitor light intensity

• To detect temperature changes

• To measure pressure

Which type of CCTV system uses a video server to stream footage over the internet?

• Analog CCTV Systems

• IP CCTV Systems

• Hybrid CCTV Systems

• Digital CCTV Systems