Faculty of Computer Science & Engineering Chapter 02. Radio
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Transcript Faculty of Computer Science & Engineering Chapter 02. Radio
FACULTY OF
COMPUTER SCIENCE &
ENGINEERING
Chapter 02. Radio
Frequency
QUESTION 1
1. When visual line of sight (LOS) is present, RF
LOS will always be present.
A. This statement is always true
B. This statement is always false
C. It depends on the configuration of the antennas
QUESTION 2
2. When RF LOS is present, visual LOS will
always be present.
A. This statement is always true
B. This statement is always false
C. It depends on the specific factors
QUESTION 3
3. What unit of measurement is used to quantify
the power gain or loss of an RF signal? Choose all
that apply.
A. dBi
B. dBm
C. Watts
D. dB
QUESTION 4
4. Using which of the following will reduce VSWR?
Choose all that apply.
A. Cables and connectors that all have an impedance of 50
Ohms
B. Cables with a 50 Ohm impedance and connectors with
75 Ohm impedance
C. Cables and connectors that all have an impedance of 75
Ohms
D. Cables with 75 Ohm impedance and connectors with 50
Ohm impedance
QUESTION 5
5. In an RF circuit, what is the intentional
radiator defined as?
A. The output of the transmitting device
B. The output of the last connector before the signal
enters the antenna
C. The output as measured at the antenna element
D. The output after the first length of cable attached
to the transmitting device
QUESTION 6
6. dBi is a relative measurement of decibels to
which one of the following?
A. Internet
B. Intentional radiator
C. Isotropic radiator
D. Isotropic radio
QUESTION 7
7. Which one of the following is considered
impedance in an RF circuit?
A. The inability to transmit RF signals
B. Interference of an RF signal during foul weather
C. Resistance to current flow, measured in Ohms
D. The frequency on which an RF transmitter sends
signals
QUESTION 8
8. In RF mathematics, 1 watt equals what
measurement of dBm?
A. 1
B. 3
C. 10
D. 30
E. 100
QUESTION 9
9. Which one of the following RF behaviors is
defined as “the bending of a wave as it passes
through a medium of different density”?
A. Diffraction
B. Reflection
C. Refraction
D. Distraction
QUESTION 10
10. Given an access point with 100 mW of output
power connected through a 50-foot cable with 3
dB of loss to an antenna with 10 dBi of gain,
what is the EIRP at the antenna in mW?
A. 100 mW
B. 250 mW
C. 500 mW
D. 1 W
QUESTION 11
11. Given a wireless bridge with 200 mW of
output power connected through a 100 foot cable
with 6 dB of loss to an antenna with 9 dBi of
gain, what is the EIRP at the antenna in dBm?
A. 20 dBm
B. 26 dBm
C. 30 dBm
D. 36 dBm
QUESTION 12
12. Given an access point with an output power of
100 mW connected through a cable with a loss of
2 dB to antenna with a gain of 11 dBi, what is the
EIRP in mW?
A. 200 mW
B. 400 mW
C. 800 mW
D. 1 W
QUESTION 13
13. Given an access point with an output power of
20 dBm connected through a cable with a loss of
6 dB to an amplifier with a 10 dB gain, then
through a cable with 3 dB of loss to an antenna
with 6 dBi of gain, what is the EIRP in dBm?
A. 18 dBm
B. 23 dBm
C. 25 dBm
D. 27 dBm
QUESTION 14
14. What is the net gain or loss of a circuit if it is
using two cables with 3 dB loss each, one
amplifier with a 12 dB gain, 1 antenna with 9 dBi
gain, and an attenuator with a loss of 5 dB?
A. 5 dB
B. 10 dB
C. 15 dB
D. 20 dB
QUESTION 15
15. Which of the following is a cause of VSWR?
A. Mismatched impedances between wireless LAN
connectors
B. Too much power being radiated from the antenna
element
C. The incorrect type of antenna used to transmit a
signal
D. Use of the incorrect RF frequency band
QUESTION 16
16. Radio waves propagate (move) away from the
source (the antenna) in what manner?
A. In a straight line in all directions at once within
the vertical and horizontal beamwidths
B. In circles spiraling away from the antenna
C. In spherical, concentric circles within the
horizontal beamwidth
D. Up and down across the area of coverage
QUESTION 17
17. Why is the Fresnel Zone important to the integrity of
the RF link?
A. The Fresnel Zone defines the area of coverage in a typical
RF coverage cell
B. The Fresnel Zone must always be 100% clear of any and all
blockage for a
wireless LAN to operate properly
C. The Fresnel Zone defines an area around the LOS that can
introduce RF signal
interference if blocked
D. The Fresnel Zone does not change with the length of the RF
link
QUESTION 18
18. The FCC allows how many watts of power to
be radiated from an antenna in a point to
multipoint wireless LAN connection using
unlicensed 2.4 GHz spread spectrum equipment?
A. 1 watt
B. 2 watts
C. 3 watts
D. 4 watts
QUESTION 19
19. In regards to gain and loss measurements in
wireless LANs, the statement that gains and
losses are additive is:
A. Always true
B. Always false
C. Sometimes true
D. Sometimes false
E. It depends on the equipment manufacturer
The
END