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Final Battle

Total questions: 99

Worksheet time: 2hrs 37mins

Name
Class
Date
1.

What does RADAR stand for?

a)

Radio Detection and Ranging

b)

Royal Association for Disability and Rehabilitation

c)

Random Access Digital Audio Recorder

d)

Results, Approaches, Deploy, Assess, Refine

2.

A microwave is an electromagnetic wave with a relatively ____ wavelength and ____ frequency

a)

low high

b)

high low

c)

long low

d)

short high

3.

Microwaves are often classified as radio waves, but they have ______ frequencies

a)

lower

b)

higher

c)

longer

d)

shorter

4.

A cell phone encodes the sound of the caller's voice in microwaves by changing the ______ of the waves

a)

amplitude

b)

frequency

c)

wavelength

d)

pitch

5.

Why do you think cell towers are high above the ground?

a)

To prevent interruption from buildings and other obstructions

b)

So people know where to point their phone when trying to make a call

c)

So birds can see them and fly around the tall towers

d)

The architect's like to show off their abilities to make tall structures

6.

Which of the following is NOT a use for RADAR?

a)

Tracking storms

b)

Detecting air traffic

c)

vehicle speeds

d)

Making phone calls

7.

Which is NOT a use for mircrowaves

a)

microwave ovens

b)

cell phones

c)

radar

d)

radio

8.

As the car approached the radar gun, the _____ microwaves get bunched up in front of the car

a)

refracted

b)

reflected

c)

absorbed

d)

repealed

9.

The _____ the car is moving, the greater the increase in the __________ of the waves

a)

faster frequency

b)

slower frequency

c)

faster amplitude

d)

slower amplitude

10.

What is used to detect the speed of moving objects?

a)

Electromagnetic spectrum

b)

microwave ovens

c)

doppler effect

d)

Radar gun

11.
Which color of visible light has the longest wavelength? 
a)
green
b)
blue
c)
red
d)
violet
12.
Which type of wave can reflection occur with? 
a)
light waves
b)
sound waves
c)
electromagnetic waves
d)
all of the above 
13.
What type of wave is used for communication?
a)
gamma rays
b)
x rays
c)
radio waves
d)
infrared waves 
14.
Visible radiation is the only part of the electromagnetic spectrum that we can __. 
a)
feel
b)
taste
c)
see
d)
hear 
15.
send out short bursts of microwaves in order to detect objects 
a)
infrared rays 
b)
photophor
c)
incandescent bulb
d)
radar
16.
cant be seen but are felt as heat
a)
gamma rays 
b)
radar
c)
infrared rays
d)
radio waves 
17.
What acts as a prism in nature to separate the colors of white light and create a rainbow? 
a)
Pollution, rainbows came into existence with the industrial revolution.
b)
Air
c)
clouds
d)
rain drop
18.
What is the speed of a microwave?
a)
3.0*10E10
b)
8.0*10E3
c)
3.0*10E8
d)
3.0*10E4
19.
True or False:
Microwaves range in about the size of a building
a)
True
b)
False
20.
Who discovered microwaves?
a)
James Clerk Maxwell
b)
Frederick William Herschel
c)
Johann Ritter
d)
Wilhelm Conrad Roentgen
21.

In a transmission line terminated by characteristic impedance

a)

there is no reflection of the incident wave

b)

the reflction is maximum due to termination

c)

there is a large number of maximum and minimum on the line

d)

the incident current is zero

22.

When electromagnetic waves hit

a surface, they can be reflected, absorbed or...

a)

refracted

b)

diffracted

c)

transmitted

d)

reflected

23.

The curved satellite dish reflects microwaves from a satellite to the...

a)

transmitter

b)

reciever

c)

receiver

d)

satellite

24.

What are optical fibres made from?

a)

Solid Glass

b)

Liquid Hydrogen

c)

Copper

d)

Human Hair

25.

Multiplexing is the method that allows lots of messages to be sent...

a)

one at a time

b)

at the same time

c)

at the same destination

d)

in order

26.

Microwaves have a frequency of...

a)

over 30 MHz

b)

3-30 MHz

c)

over 30 GHz

d)

over 30 kHz

27.

Optical fibers suffer radiation losses at bends or curves on their paths. State true or false


a)

True

b)

False

28.
What are the two general types of fiber optic cable found in current networking environments?
a)
Red and Green
b)
Singlemode and Multimode
c)
High-frequency and Low-frequency
d)
Narrowband and Wideband
29.
True or False: All fiber optic cables have the same type of physical connector?
a)
True
b)
False
30.
Are fiber optics used for long or short distance calls?
a)
Long Distance
b)
Both
c)
Short Distance
31.
How does light travel through the cable?
a)
Refraction and Reflection
b)
Refraction only
c)
Dispersion
d)
Total Internal Reflection
32.
What are Fiber Optics?
a)
Thin, flexible fibers of glass
b)
Flexible fibers of glass
c)
Thin fibers of glass
d)
Those glow toys
33.
How are Fiber Optics used in everyday life?
a)
IPads
b)
iPods
c)
Cell phones
d)
Land lines
34.
How do Fiber Optics work?
a)
By connecting and transferring energy
b)
By remitting and subtracting power from other fiber optics
c)
By using light pulses to transfer data
d)
By converting sound waves in to binary code
35.
Are fiber optics used for long or short distance calls?
a)
Long Distance
b)
Both
c)
Short Distance
36.
Which statement is true?
a)
Digital files of binary code are easy to transmit
b)
Analog systems convert wave information into a binary code
c)
Digital recordings sound more like the original
d)
Analog signals do not distort over long distances
37.
Which of the following increased the efficiency of systems such as TV, telephone, and internet?
a)
DVD burners
b)
MP3 players
c)
Electrical Wires
d)
Fiber Optics
38.
Which of the following allows fiber optic cables to transmit data?
a)
total bending of light
b)
total dispersion of light
c)
total internal combustion
d)
total internal reflection
39.
In fiberoptic cables used to transmit communication data, what does a receiver and decoder do?
a)
receive the sound signal and convert to binary data
b)
receive the light signal and convert to binary data
c)
receive the audio signal and convert to analog data
d)
receive the direct signal and convert it to analog data
40.
What increases the amount of information transmitted by fiberoptic cables?
a)
increasing the length
b)
using plastic instead of glass in the cable
c)
increasing the number of fibers
d)
using fewer optical amplifiers along the cable
41.
Why are fiberoptic cables preferred over copper wire in telephone and Internet applications?
a)
used both indoors and outdoors
b)
easier to manufacture and install into office buildings
c)
more flexible and needs no power source
d)
less sensitive to temperature/electromagnetic interference
42.
When would fiber optics most likely be preferred over radio waves for communication?
a)
The content of the communication needs to remain secure
b)
The climate of the area is hot and humid
c)
There are frequent power outages in the area
d)
little money available to build the communication system
43.
Which describes an advantage of total internal reflection within an optical fiber?
a)
It converts electrical signals into optical signals
b)
allows optical signals to be transmitted along a curved path
c)
It converts optical signals into electrical signals
d)
It allows electrical signals to be transmitted along a curve
44.
What has replaced much of the copper circuitry that connected telephone switching stations?
a)
microelectronics
b)
tungsten wire
c)
fiber optic cable
d)
reinforced plastic
45.

is a machine that makes powerful single color light

a)

fiber optic signals

b)

electromagnetic signal (radio waves)

c)

laser

d)

fiber optic cable

46.

signals that travel through the air without wires.

a)

fiber optic signals

b)

electromagnetic signal

c)

laser

d)

fiber optic cable

47.

The symbol of c represent of . . . . . .

a)

speed of light

b)

speed of wave

c)

speed of material

d)

speed of car

48.

What is the function of fiber optics?

a)

transmit light signals over long distances

b)

transmit energy over long distances

c)

transmit heat over long distances

d)

transmit magnetic signals over long distances

e)

transmit electric over long distances

49.
What is a downlink?
a)
A hyperlink on a website that you click to download material
b)
A satellite dish that receives a satellite signal
c)
A link that stations can hook up to to download audio
d)
A satellite dish that transmits a satellite signal
50.
What is an uplink?
a)
A hyperlink on a website that you click to upload material
b)
A satellite dish that receives a satellite signal
c)
A link where stations can upload audio
d)
A satellite dish that transmits a satellite signal
51.
Which of the following is an artificial satellite ?
a)
Moon
b)
Sun
c)
GPS
52.
Sending TV broadcasts down to Earth would use a...
a)
Geostationary satellite
b)
Low polar orbit satellite
c)
A set of satellites with different orbital patterns
53.
Global Positioning System (GPS) in vehicles would use a...
a)
Geostationary satellite
b)
Low polar orbit satellite
c)
A set of satellites with different orbital patterns
54.
Military purposes including spying would use a...
a)
Geostationary satellite
b)
Low polar orbit satellite
c)
A set of satellites with different orbital patterns
55.
Taking weather measurements, e.g. cloud cover or wind, over a small part of Earth would use a...
a)
Geostationary satellite
b)
Low polar orbit satellite
c)
A set of satellites with different orbital patterns
56.
Giving a general overview of half the Earth for weather
forecasting would use a...
a)
Geostationary satellite
b)
Low polar orbit satellite
c)
A set of satellites with different orbital patterns
57.
The force required to keep satellites in orbit is called...
a)
Centripetal force
b)
Gravity
c)
Air resistance 
58.
Low polar orbit satellites travel _________ than geostationary satellites.
a)
faster
b)
slower
59.
The smaller the radius of the orbit the __________ the gravitational pull
a)
larger
b)
smaller 
60.

People can use the Global Positioning System to locate the position of...

a)

Earth in the solar system

b)

The solar system in the universe

c)

Any object on Earth

d)

Every planet in the solar system

61.

A satellite is any object that is ___________ Earth

a)

escaping from

b)

moving toward

c)

distant from

d)

orbiting around

62.

The ___________ confines the electromagnetic wave so that it is not lost or spread out, thus evening out the energy.

a)

Magnetron

b)

Watchdog timer

c)

Leakage Detector

d)

Waveguide

63.

Which component of the radar system is used to shape the RF energy into a narrow beam?

a)

Transmitter

b)

Antenna

c)

Receiver

d)

Waveguide

64.

Which component of the radar system determines the operating frequency?

a)

Oscillator

b)

Antenna

c)

PFN

d)

Waveguide

65.

What information cannot be provided by the CW Doppler radar?

a)

Bearing

b)

Velocity

c)

Range

d)

Elevation

66.

Referred to as a ferrite device that can be used in lieu of a duplexer to isolate a microwave transmitter and receiver when both are connected to the same antenna.

a)

Isolator

b)

Circulator

c)

Coupler

d)

Diode

67.

A microwave tube that uses a slow-wave structure as an input section that is isolated from another slow-wave section at its output.

a)

Klystron

b)

Magnetron

c)

Twystron

d)

TWT

68.

A waveguide acts as a

a)

LPF

b)

HPF

c)

BPF

d)

Resonator

69.

Which of the following is a microwave frequency?

a)

1.7 MHz

b)

750 MHz

c)

0.98 GHz

d)

22 GHz

70.

When the electric field is perpendicular to the direction of propagation, the mode is said to be

a)

Vertically polarized

b)

Horizontally polarized

c)

Transverse electric

d)

Transverse magnetic

71.

Which of the following is not a microwave tube?

a)

TWT

b)

CRT

c)

Klystron

d)

Magnetron

72.

A microwave band of 18 to 27 GHz is considered as the ______ band.

a)

C

b)

X

c)

Q

d)

K

73.

A waveguide section used to combine two or more signals

a)

Taper

b)

Twist

c)

Bend

d)

Tee

74.

A microwave transmission line constructed of a center conductor suspended between parallel conductive ground planes is called

a)

Microstrip

b)

Coax

c)

Stripline

d)

Waveguide

75.

The region within the influence of the induction field of an antenna.

a)

Far field

b)

Near field

c)

Radiation field

d)

Radiation pattern

76.

The k factor under normal atmospheric conditions in a microwave radio data profile calculation is

a)

2/3

b)

0

c)

4/3

d)

1

77.

How many receiving antenna(s) are used with frequency diversity?

a)

1

b)

2

c)

3

d)

4

78.

A type of diversity reception, where the output of the transmitter is fed to two or more antennas that are physically separated by an appreciable number of wavelengths.

a)

Frequency

b)

Space

c)

Angle

d)

Polarization

79.

Which of the following is used as a high power microwave oscillator?

a)

Thyratron

b)

Magnetron

c)

Klystron

d)

Twystron

80.

A microwave communications system space loss calculation formula

a)

94.2 + 20 log F + 20 log D

b)

92.4 + 20 log F + 20 log D

c)

94.2 + 10 log F + 20 log D

d)

92.3 + 10 log F + 20 log D

81.

Which of the following frequency bands fall under the microwave band?

a)

UHF and SHF

b)

SHF and EHF

c)

UHF, SHF and EHF

d)

VLF, LF and MF

82.

Which of the following frequency bands fall under the microwave band?

a)

UHF and SHF

b)

SHF and EHF

c)

UHF, SHF and EHF

d)

VLF, LF and MF

83.

The progressive decrease of signal strength with increasing distance

a)

Radiation

b)

Attenuation

c)

Modulation

d)

Propagation

84.

A magnetic field is introduced into the waveguide by a

a)

probe

b)

dipole

c)

stripline

d)

capacitor

85.

Varactor and step recovery diodes are widely used in what type of circuit?

a)

Amplifier

b)

Oscillator

c)

Frequency multiplier

d)

Mixer

86.

The optimum clearance from an obstacle in a microwave system is accepted as ________ of the first fresnel zone radius.

a)

0.6

b)

0.5

c)

0.9

d)

1.5

87.

Which of the following microwave tubes uses the principle of velocity modulation?

a)

TWT

b)

CFA

c)

Magnetron

d)

Klystron

88.

An X band radar operates in which frequency band?

a)

1 - 2 GHz

b)

2 - 4 GHz

c)

4 - 8 GHz

d)

8 - 12 GHz

89.

Diodes designed to store energy in their capacitance during forward bias and generates harmonics in the reverse bias

a)

Step recovery

b)

Gunn

c)

APD

d)

IMPATT

90.

Topographical maps are maps used for microwave communications systems design because _________ are shown, thereby elevations are known.

a)

Latitudes

b)

Longitudes

c)

Contour lines

d)

Scales

91.

The angle between electric and magnetic fields in a waveguide is

a)

90º

b)

0º

c)

180º

d)

360º

92.

The first satellite that was able to simultaneously transmit and receive signal was

a)

Echo I

b)

Telstar I

c)

Echo II

d)

Syncom I

93.

The first commercial satellite was

a)

Early Bird

b)

Aguila

c)

Telstar

d)

Echo I

94.

Who coined the term "satellite"?

a)

Louise and Clark

b)

Clarke

c)

MacArthur

d)

Arthur and Clarke

e)

None of these.

95.

The first american satellite that was launched was

a)

Score

b)

Explorer I

c)

Sputnik

d)

Telstar I

96.

Communication satellites could use

a)

geosynchronous orbits

b)

near-geostationary orbits

c)

low Earth-orbits

d)

(all of these)

97.

Satellites that are unusually low in weight and small is size are called

a)

solar power satellites

b)

miniaturized satellites

c)

biosatellites

d)

weather satellites

98.

Reconnaissance satellites differ from earth observation satellites mainly in

a)

structure

b)

speed of revolution

c)

application

d)

design

99.

The first Filipino satellite was

a)

Agila I

b)

Agila II

c)

not yet launched

d)

Eagle II

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