CBT Practice Test Video Answers

1. B

FM broadcasting uses frequency modulation

2. B

ATSC defines digital video and audio transmission standards

3. B

An encoder converts analog audio into digital

4. B

An exciter modulates the carrier signal

5. A

VHF ranges from 30–300 MHz

6. B

BNC connectors are standard in video

7. B

Impedance matching minimizes reflections

8. B

The SBE administers the CBT

9. A

Multiplexing combines multiple signals

10. B

75 ohms is the standard impedance

11. B

RF power is measured in watts

12. A

UPS provides voltage stabilization

13. B

A vectorscope measures color phase and saturation

14. B

Dolby Digital (AC-3) is standard in TV

15. B

ESD protection prevents static damage

16. B

FCC Part 73 covers broadcasters

17. A

Modulation monitors check legal modulation limits

18. B

Fall-arrest systems are required

19. B

Digital broadcasting improves quality and efficiency

20. C

A multiplexer combines multiple signals

21. C

OFDM is used in HD Radio

22. B

Crest factor is RMS-to-peak ratio

23. B

Spectrum analyzers measure frequency content

24. C

Coaxial cable is most used

25. D

Proof of Performance ensures FCC compliance

26. C

Dipoles radiate omnidirectionally

27. B

Return loss indicates reflected signal

28. B

Grounding ensures safety and reduces interference

29. A

Program logs list daily broadcast content

30. C

±75 kHz is maximum FM deviation

31. B

Redundancy ensures backup operation

32. A

Nyquist theorem sets sampling rate

33. B

DVB-T is Europe’s digital TV standard

34. B

STL links studio to transmitter

35. B

Modulation index = frequency deviation / modulating frequency

36. B

FCC regulates spectrum and licensing

37. B

Circulators protect transmitters from reflections