Audiovisual content

1. Which parameter is the most important to the projected image?

		a)	contrast
		b)	brightness
		c)	color
		d)	resolution

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2. Which light source provides the best light output (for projection)?

		a)	classical discharge lamp
		b)	LED
		c)	plasma
		d)	bulb

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3. What is the definition of sound?

		a)	mechanical movement of particles
		b)	acoustic form of an electromagnetic wave
		c)	mechanical movement of particles in vacuum
		d)	audible waves

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4. What is the speed of sound in the air?

		a)	about 340 m/s
		b)	about 1500 m/s
		c)	about 6000 m/s
		d)	about 30 m/s

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5. What is the frequency range of audible sound?

		a)	20 Hz - 20 kHz
		b)	2 - 4 kHz
		c)	0.5 - 2 kHz
		d)	20 Hz - 20 MHz

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6. What is the "inverse square" rule?

		a)	When the listening distance is doubled, the volume is reduced to 25% of the original value. Dubbing the listening distance increases the listening area four times.
		b)	When doubling the listening distance, the volume increases by 25% of the original value. When dubbing the listening distance, the listening area is reduced by four times.
		c)	When doubling the listening distance, the volume is reduced to 50% of the original value. When dubbing the listening distance, the listening area increases eight times.
		d)	When doubling the listening distance, the volume increases by 50% of the original value. When the listening distance is doubled, the listening area is reduced eight times.

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7. What is decibel?

		a)	a physical unit used to measure sound intensity level
		b)	a basic physical SI unit
		c)	a physical unit used to express the gain parameter (of sound)
		d)	a physical unit used to express sound attenuation

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8. A decibel unit is:

		a)	logarithmic
		b)	linear
		c)	exponential
		d)	parabolic

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9. Which frequencies are usually affect by the delay (speaker installation)?

		a)	high
		b)	low
		c)	medium
		d)	delay does not affect sound reproduction

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10. Which component is a basic component of a control system?

		a)	central controller
		b)	software and applications
		c)	communication gates
		d)	environmental detectors

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11. What does IoT mean?

		a)	Internet of Things
		b)	Internet technology
		c)	Internet in the facility
		d)	smart Internet

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12. What is the function of a switch?

		a)	it allows you to create individual segments of a local network
		b)	it allows you to connect multiple LANs or connect two or more geographically distant networks
		c)	it allows routing only based on a static routing table
		d)	it allows you to create secure communication tunnels

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13. What is the function of a router?

		a)	it allows you to connect multiple LANs or connect two or more geographically distant networks
		b)	it allows you to create individual segments of a local network
		c)	it allows you to connect client devices to your local network
		d)	it enables PoE/PoE + local power supply

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14. What is streaming?

		a)	technology for the continuous transmission of audiovisual material between the source and the end user
		b)	technology for secure transferring audiovisual material between the source and the end user
		c)	technology for storing and managing audiovisual material
		d)	technology for creating audiovisual content

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15. Which parameter takes into account properties of a projector, screen and lighting conditions in a room?

		a)	system contrast
		b)	system brightness
		c)	lighting level
		d)	light output intensity

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16. What device is used for large-screen image projection?

		a)	data projector
		b)	flat display
		c)	TV set (receiver)
		d)	camera

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17. What is the unit indicating light intensity of a light source?

		a)	lumen
		b)	lux
		c)	decibel
		d)	candela

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18. In which part of the electroacoustic chain is there a microphone?

		a)	at its beginning
		b)	at its end
		c)	in the middle
		d)	anywhere

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19. What is a microport?

		a)	wireless microphone
		b)	earphone
		c)	wireless loudspeaker
		d)	headset

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20. Which codec is currently the most used for streaming?

		a)	H.264
		b)	CDN
		c)	RS232
		d)	MPEG-2

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