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WorksheetsMCOM Quiz1
Total questions: 51
Worksheet time: 26mins
Name
Class
Date
1.
Which of the following occurs when the wave hits the objects with smooth surface?
a)
Refraction
b)
Diffraction
c)
Scattering
d)
Reflection
2.
Which of the following occurs when the wave hits the objects with rough surface?
a)
Reflection
b)
Diffraction
c)
Scattering
d)
Refraction
3.
Small scale fading is caused by _____________
a)
Drag shift
b)
Doppler shift
c)
Vertical shift
d)
Horizontal shift
4.
Diffraction occurs when the wave hits the __________ surfaces
a)
rough
b)
smooth
c)
sharp edge
d)
flat
5.
Which phenomenon occurs when a radio wave hits objects much larger than its wavelength?
a)
Reflection
b)
Diffraction
c)
Scattering
d)
Absorption
6.
Which phenomenon occurs when a radio wave hits objects much smaller than its wavelength?
a)
Reflection
b)
Diffraction
c)
Absorption
d)
Scattering
7.
When a signal hits the sharp edge of a hill which of the following occurs?
a)
Reflection
b)
Diffraction
c)
Scattering
d)
Refraction
8.
When a signal is spread in multiple directions from a rough surface, it describes:
a)
Diffraction
b)
Reflection
c)
Scattering
d)
Refraction
9.
The two-ray model includes for
a)
Direct line-of-sight path only
b)
Ground reflection and direct line-of-sight path
c)
Scattering only
d)
Absorption only
10.
The free space propagation model assumes
a)
Multipath fading
b)
Line of sight between transmitter and receiver
c)
Multiple reflections
d)
Ground absorption
11.
In the free space model, the received power decreases with the square of
a)
Frequency
b)
Transmit power
c)
Distance
d)
Antenna height
12.
At large distances, the received power in the two-ray model falls off as
a)
1/d
b)
1/d^2
c)
1/d^3
d)
1/d^4
13.
In the free space model, if the distance between transmitter and receiver increases, the received power will:
a)
Increase
b)
Decrease
c)
Stay the same
d)
become zero
14.
In the two ray model, if the distance between transmitter and receiver increases, the received power will:
a)
Increase
b)
Decrease
c)
Stay the same
d)
become zero
15.
In the two ray model, if the power of the transmitter increases, the received power will:
a)
Increase
b)
Decrease
c)
Stay the same
d)
become zero
16.
Which of these environments causes higher path loss?
a)
Open field
b)
Indoor hallway
c)
Dense urban area with buildings
d)
Ocean surface
17.
Which factor has the biggest effect on large-scale path loss?
a)
Device temperature
b)
Weather condition
c)
Distance between transmitter and receiver
d)
Length of antenna cable
18.
Which of the following is the the rapid fluctuation of a radio signal's amplitude and phase over short distances?
a)
Shadowing
b)
Path loss
c)
Free space propagation
d)
Small-scale fading
19.
Which of the following is large-scale path loss?
a)
Signal gets weaker quickly over short distances
b)
Signal gets weaker slowly over long distances
c)
Signal becomes stronger when moving
d)
Signal is blocked by one object only
20.
Small-scale fading happens _____________
a)
Over long distances
b)
When changing phone settings
c)
Over short distances and short times
d)
When antenna is turned off
21.
BTS stands for __________________
a)
Base Transceiver Switch
b)
Base Transceiver Station
c)
Base Telephone Station
d)
Base Telephone Switch
22.
In ______________ channels are permanently allotted for cellular technology
a)
fixed assignment strategy
b)
dynamic assignment strategy
c)
double assignment strategy
d)
single assignment strategy
23.
If cluster size is 7, the frequency reuse factor is ________
a)
1/4
b)
1/7
c)
1/9
d)
1/5
24.
In ____________ handover, make before break handoff is followed.
a)
light
b)
soft
c)
hard
d)
tight
25.
Which of the following generation provides ultra broadband internet access(high speed)
a)
1 G
b)
2 G
c)
3 G
d)
4 G
26.
If the frequency reuse factor is 1/4, the cluster size is ____
a)
4
b)
7
c)
9
d)
5
27.
In ____________ handover, break befrore make handoff is followed.
a)
light
b)
soft
c)
hard
d)
tight
28.
Which of the following is frequency reuse in cellular networks?
a)
Using a frequency only once
b)
Using different frequencies in every cell
c)
Reusing the same frequency in different cells that are far apart
d)
Blocking frequencies to reduce interference
29.
The frequency reuse is used ________
a)
To reduce battery usage
b)
To improve camera quality
c)
To change mobile phones
d)
To use limited frequencies more efficiently
30.
Which component controls multiple BTS units?
a)
SIM card
b)
HLR
c)
BSC (Base Station Controller)
d)
MSC (Mobile Switching Center)
31.
Which one helps in reducing interference in frequency reuse?
a)
Placing same-frequency cells close together
b)
Using high power in all cells
c)
Keeping distance between same-frequency cells
d)
Using the same channel for all users
32.
A system that gives channels only when needed uses _______
a)
Static assignment
b)
Random assignment
c)
Dynamic assignment
d)
Bluetooth assignment
33.
Why do we need channel assignment strategies?
a)
To stop people from calling
b)
To reduce tower height
c)
To manage how frequencies are given to users
d)
To charge user fees
34.
Why is handoff prioritization important?
a)
To increase battery life
b)
To avoid dropping ongoing calls
c)
To reduce internet speed
d)
To block new users
35.
In practical systems, which of the following is used to decide when to handoff?
a)
Phone model
b)
Signal strength comparison
c)
Battery percentage
d)
SIM card type
36.
The main reason for dividing a city into cells is
a)
To use frequencies more efficiently and serve more users
b)
To reduce network coverage
c)
To increase data charges
d)
To avoid using towers
37.
The commonly used shape to represent cells in diagrams is __________
a)
Circle
b)
Triangle
c)
Square
d)
Hexagon
38.
When a mobile user moves from one cell to another during a call, __________
a)
the call ends automatically
b)
a handoff occurs
c)
the phone turns off
d)
the signal is lost permanently
39.
A cell in a cellular network refers to ____________
a)
A battery unit
b)
A mobile phone
c)
A small area covered by a base station
d)
A data center
40.
Which of these is the correct hierarchy in a mobile network?
a)
BTS → BSC → MSC
b)
BTS → MSC → BSC
c)
MSC → BTS → BSC
d)
BSC → SIM → BTS
41.
Which of the following controls many BSCs?
a)
BTS
b)
MSC
c)
SIM card
42.
The co-channel interference in cellular systems is caused due to the
a)
Signals from nearby Wi-Fi routers
b)
Signals from different cells using the same frequency
c)
Signals from distant radio stations
d)
Signals from Bluetooth devices
43.
Cells that use the same frequency are called as _________
a)
Master cells
b)
Co-channel cells
c)
Power cells
d)
Backup cells
44.
The adjacent channel interference is caused by the __________
a)
Interference from signals using the same frequency
b)
Interference from neighboring frequency channels
c)
Interference from 5G towers only
d)
Interference from Wi-Fi routers
45.
Adjacent channel interference is more common when
a)
Phone is far from BTS
b)
Phones are switched off
c)
Network is not in use
d)
Frequencies are spaced too closely
46.
Which of the following defines cell splitting?
a)
Breaking a phone into two
b)
Using Wi-Fi and mobile data at the same time
c)
Dividing a large cell into smaller cells to increase capacity
d)
Using more towers for the same user
47.
The adjacent channel interference can be reduced by _____________
a)
Using proper filtering and guard bands
b)
Changing mobile phone brand
c)
Using same frequencies everywhere
d)
Making cells closer
48.
In cell splitting, the original cell is divided into:
a)
Larger cells
b)
Smaller cells with the same capacity
c)
Smaller cells with lower power transmitters
d)
Higher frequency cells
49.
In cell sectoring, a cell is typically divided
a)
Into equal squares
b)
Into concentric circles
c)
Into 60° or 120° sectors
d)
Into 45° sectors
50.
The function of a repeater in a wireless system is
a)
To generate new signals
b)
To reduce frequency reuse
c)
To amplify and retransmit signals
d)
To store and forward messages
51.
Repeaters are used in cellular systems primarily to:
a)
Encrypt voice data
b)
Increase the number of users
c)
Improve billing accuracy
d)
Extend coverage in weak signal areas
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