Analog Communications Mock Test 8

10%

Question 1 of 10

1. Scattering causes _________

reflection

dispersion

refraction

loss

Question 1 of 10

Question 2 of 10

2. What is the height of the geosynchronous orbit above the equator?

depends on escape velocity

35,780km

3,578km

depends on satellite velocity

Question 2 of 10

Question 3 of 10

3. Pagers use _________

Both VHF and UHF bands

UHF band

VHF band

HF band

Question 3 of 10

Question 4 of 10

4. What is the advantage of using a switch instead of a hub?

it is helpful in placing outputs in an ordered way

it is faster when used in large networks

it is cheaper when used in large networks

it reduces the number of collisions

Question 4 of 10

Question 5 of 10

5. NTSC specifications was drawn up by ________

EIA

IBM

FCC

Cisco

Question 5 of 10

Question 6 of 10

6. What is the approximate IEEE specification covering wireless LANs?

802.12

802.10

802.13

802.11

Question 6 of 10

Question 7 of 10

7. LNA stands for __________

low noise amplification

low narrow amplification

low noise amplifier

low narrow amplifier

Question 7 of 10

Question 8 of 10

8. Signal to noise ratio is calculated as signal voltage divided by noise voltage.

False

True

Question 8 of 10

Question 9 of 10

9. If we compared to the core, the index of refraction of cladding must be ________

infinite

less

greater

same

Question 9 of 10

Question 10 of 10

10. AMPS was designed for POTS only.

True

False

Question 10 of 10