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