Audio / Video

Question 1

ISDN uses ____ technology?
A) Only digital
B) Digital and analog
C) Only analog
D) neither digital or analog

Answer 1

Only digital

Question 2

Maximum color depth of SVGA monitor?
A) 16million
B) 64k
C) 256
D) 1024

Answer 2

16 million

Question 3

How many devices a DMX512 can support

Answer 3

32

Question 4

What is the SMPTE speed for a NTSC color TV

Answer 4

29.97 frames per sec

Question 5

What type of microphone is essentially a capacitor with one plate of the capacitor moving in respond to sound waves. usually requires a small battery to provide voltage across the capacitor.

Answer 5

Condenser microphone

Question 6

A 120 ohm terminator is used in a DMX loop to

Answer 6

absorb reflected signals or reduce reflection interference

Question 7

Advantage of using a 70 volt audio system

Answer 7

Less line loss

Question 8

What amp configuration is best for high frequency operation

Answer 8

common emmitter

Question 9

What is standard lighting control protocol

Answer 9

DMX512

Question 10

In a DMX 512 channel, how many increments are required to go from 0 to 100%
A) 256
B) 512
C) 128
D) 1024

Answer 10

256

Question 10

a phase locked loop might be used in a

Answer 10

TV tuner

Question 11

You would expect to find a comb filter

Answer 11

in a tuner

Question 12

Video convergence is a process of

Answer 12

aligning the different color electron beams so they overlay each other

Question 13

DMX 512 uses what impedance standard

Answer 13

RS-485

Question 14

A CRT’s refresh rate is important because it controls

Answer 14

flicker

Question 15

What is the SMPTE speed for film

Answer 15

24 frames per second

Question 16

What is a ringing test used for television

Answer 16

test the transformer coil in the flyback and yoke

Question 17

Which of the following statements is true about DMX
A) it must be terminated with a 120 ohm resistor
B) it must be tapped back to the controller
C) it must be addressed to 255
D) it must be terminated with a 50 micro farad capacitor

Answer 17

it must be terminated with 120 ohm resistor

Question 18

What is the SMPTE video data transfer rate

Answer 18

80 bits per second

Question 19

What is the NTSC horizontal frequency for TV

Answer 19

15.7 KHz

Question 20

The correct way to install four 8 ohm speakers to one 8 ohm input is

Answer 20

connect 2 speakers in parellel in series with other 2 more speakers in parellel

Question 21

power supply has an internal source resistance of 10 ohm. What value of DC load resistor results in the maximum power transfer

Answer 21

10 ohm

Question 21

When you increase the gain of an amp you automatically

Answer 21

decrease the bandwidth

Question 22

24 frame timecode is used for

Answer 22

film

Question 23

increase of 3db will ___the power of the audio signal

Answer 23

double

Question 24

An amplifier generates a completely new output signal based on? A) input signal B) the gain C) resonant frequency D) the gain

Answer 24

the input signal

Question 25

On a 70 volt audio system, one speaker out of a chain of speakers needs to be louder. This is accomplished by ___?

Answer 25

Changing the tap on the transformer

Question 26

A CRT's grid voltage can be as high as

Answer 26

15000 volts

Question 27

Have a 70 volt audio system with a 350 watt amp. How many speakers can be connected if all speakers are tapped at 5w

Answer 27

70 speakers

Question 28

What is the vertical frequency of a standard NTSC composite signal

Answer 28

60 Hz

Question 29

How do you create a raster?

Answer 29

electron beam scanned rapidly from left to right and top to bottom

Question 30

The audible audio freq range is from ____to ___

Answer 30

20 Hz - 20KHz

Question 31

Disadvantages of a 70V system?

Answer 31

Limited frequency response, limited to 250 Watts

Question 32

Video display that paints a complete picture on the screen in one pass is? A) non-interlaced B) LCD C) gas Plasma D) interlaced

Answer 32

non-interlaced

Question 33

NTSC signals are transmitted in? A) AM (Video signals) B) VM C) IR D) FM (audio Signal)

Answer 33

AM (Video Signal)