WorksheetsRAE 200 Part 3
Total questions: 49
Worksheet time: 16mins
Name
Class
Date
1.
Q101. A neighbour using a TV set top antenna complains of interference when you are transmitting at VHF. As a first step to eliminating this problem you can suggest:
a)
better coaxial cable on their antenna
b)
they use a preamplifier
c)
they use a roof mounted antenna
d)
their set is no good
2.
Q102. Which of the following does not rely on a magnetic field
a)
a dynamic microphone
b)
a loudspeaker
c)
a carbon microphone
d)
a transformer
3.
Q104. The main purpose of a Varactor Diode is
a)
tuning
b)
rectification
c)
voltage regulation
d)
display
4.
Q105. An antenna which transmit well is one direction is a
a)
dipole with a reflector only
b)
quarterwave grounder vertical
c)
a yagi
d)
none of the above
5.
Q106. The purpose of a balun in a transmitting antenna system is to
a)
balance harmonic radiation
b)
reduce unbalanced standing waves
c)
protect the antenna system from lightning strikes
d)
match unbalanced and balanced transmission lines
6.
Q107. The main characteristic of a vertical antenna is that it
a)
requires few insulators
b)
is very sensitive to signals coming from horizontal aerials
c)
receives signals from all points around it equally well
d)
is easy to feed with TV ribbon feeder
7.
Q108. A noise blanker on a receiver is most effective to reduce
a)
50Hz power supply hum
b)
noise originating from the mixer stage of the receiver
c)
ignition noise
d)
noise originating from the RF stage of the receiver
8.
Q109. What does an antenna tuner do
a)
it matches a transceiver output impedance to the antenna system impedance
b)
it helps the receiver automatically tune in stations that are far away
c)
it switches an antenna system to a transceiver when sending and to a receiver when listening
d)
it switches a transceiver between different kinds of antennas connected to one feed line
9.
Q110. How is a Yagi antenna constructed
a)
two or more straight, parallel elements are fixed in line with each other
b)
two or more square or circular loops are fixed in line with each other
c)
two ore more square or circular loops are stacked inside each other
d)
a straight element is fixed in the center of three or more elements that angle towards the ground
10.
Q111. When operating a mobile HF set at home from a battery supply and using the base antenna there is no interference problem. When using the same arrangment but with an earthed battery charger connected interference occurs on an electric organ. The possible cause is:
a)
the production of sub-harmonics at the transmitter
b)
very strong received signal
c)
poor RF earthing
d)
that the RF earthing is too good
11.
Q112. Yagi antenna is said to have a power gain over a dipole antenna for the same frequency band because
a)
it radiates more power than a dipole
b)
more powerful transmitters can use it
c)
it concentrate the radiation in one direction
d)
it can be used for more than one band
12.
Q113. The bandwidth of a beam antenna is dependent on
a)
radiation resistance of the dipole
b)
spacing of directors and reflectors
c)
feed cable impedance
d)
propagation conditions
13.
Q114. What is loop antenna
a)
a large circularly polarised antenna
b)
a small coil of wire tightly wound around a toraidal ferrite core
c)
serveral turns of wire wound in the shape of a large open coil
d)
any antenna coupled to a feed line through an inductive loop of wire
14.
Q115. What device is used in place of an antenna during transmitter tests so that no signal is radiated
a)
an antenna matcher
b)
a dummy load
c)
a low pass filter
d)
a decoupling resistor
15.
Q116. What phenomenon has the most effect on radio communication beyond ground wave or line of sight ranges
a)
solar activity
b)
lunar tidal effects
c)
the F1 region of the ionosphere
d)
the F2 region of the ionosphere
16.
Q117. When a signal travels in a straight line from one antenna to another what is this called
a)
line of sight propagation
b)
knife edge diffraction
c)
straight line propagation
d)
tunnel ducting
17.
Q118. An antenna which transmit equally well in all compass direction is a
a)
dipole with a reflector only
b)
quarterwave grounder vertical
c)
dipole with director only
d)
half-wave horizontal dipole
18.
Q119. What pattern is desirable for a direction-finding antenna
a)
one which is non-cardiosis
b)
one with good front-to-back and front-to-side ratios
c)
one with good top-to-bottom and side-to-side ratios
d)
one with shallow nulls
19.
Q120. To check for harmonics in a radiated signal, which of the following could be used
a)
a SWR meter
b)
an absorbption wave meter
c)
a digital frequency meter
d)
an AVO meter
20.
Q121. Radio wave polarisation is defined by the orientation of the radiated
a)
magnetic field
b)
electric field
c)
inductive field
d)
capacitive field
21.
Q122. For long distance propagation, the radiation angle of energy from the antenna should be
a)
less than 30 degrees
b)
more than 30 degrees but less than 45
c)
more than 45 degrees but less than 90
d)
90 degree
22.
Q123. A band pass filter following a VHF transmitter will
a)
stop all transmitting frequencies
b)
allow all harmonics to be radiated
c)
allow all sub harmonics to be radiated
d)
pass the desired frequency range with minimum loss
23.
Q124. The ionosphere layer mainly responsible for long distance communication at HF is
a)
D
b)
E
c)
F2
d)
F1
24.
Q125. High frequency long-distance propagation is most dependent on
a)
ionospheric reflection
b)
tropospheric reflection
c)
ground reflection
d)
inverted reflection
25.
Q126. A low pass filter will
a)
suppress sub-harmonics
b)
reduce harmonics
c)
always eliminate interference
d)
improve harmonic radiation
26.
Q127. To prevent unwanted radiation in the shack, RF connection between unit should be by
a)
open wire feeder
b)
good quality coaxial cable
c)
bell wire
d)
mains type cable
27.
Q128. What is the proper procedure for surpassing electrical noise in a mobile transceiver
a)
apply shielding and filtering where necessary
b)
insulate all place sheet metal surface from each other
c)
apply antistatic spray liberally to all non-metallic surface
d)
install filter capacitors in series with all DC wiring
28.
Q129. The resonant frequency of a tuned circuit can be checked by
a)
a DC Voltmeter
b)
a DIP Oscillator
c)
a digital frequency meter
d)
an Ohm meter
29.
Q130. How can alternator whine be minimized
a)
by connecting the radio's power leads to the battery by the longest possible parth
b)
by connecting the radio's power leads to the battery by the shortest possible path
c)
by installing a high pass filter in series with the radio DC power lead to the vehicle electrical system
d)
by installing filter capacitors in series with the DC power lead
30.
Q131. A corroded connector on a neighbour TV receiving antenna may cause
a)
unwanted mixing products due to it exhibiting diode properties
b)
mains rectification
c)
enhanced signal reception due to its filtering propeties
d)
increased amplification
31.
Q132. What is the proper way to break into a conversation on a repeater
a)
wait for the end of a transmission and start calling the desired party
b)
shout "break, break!" to show that you're eager to join the conversation
c)
turn on an amplifier and override whoever is talking
d)
say your callsign during a break between transmissions
32.
Q133. What is a digipeater
a)
a packet-radio station that retransmits only data that is marked to be retransmitted
b)
a packer-radio station that restranmits any data that it receives
c)
a repeater that changes audio signals to digital data
d)
a repeater built using only digital electronics parts
33.
Q134. When calling a station it is good practice to
a)
put your callsign first
b)
use your callsign only
c)
put the callsign of the station being called first
d)
use the callsign of the other station only
34.
Q135. When should you use simplex operation instead of a repeater
a)
when the most reliable communication are needed
b)
when a contact is possible without using a repeater
c)
when an emergency telephone call is needed
d)
when you are travelling and need some local information
35.
Q 136. The equipment at an amateur station should be so designed, constructed or maintained so that
a)
it does not cause undue interference with any wireless telegraphy
b)
it couses interference with any wireless telegraphy
c)
it will transmit automatically
d)
it operates outside the specified bands
36.
Q137. If you are talking to a station using a repeater, how would you find out using simplex instead
a)
see if you can clearly receive the station on the repeater input frequency
b)
see if you can clearly receive the station on a lower frequency band
c)
see if you can clearly receive a more distant repeater
d)
see if a third station can clearly receive both of you
37.
Q138. What is the meaning of the procedural signal CQ
a)
call on the quarter hour
b)
new antenna is being tested (no station should answer)
c)
only the called station should transmit
d)
calling any station
38.
Q139. What is the purpose of repeater operation
a)
to cut your power bill by using someone else's higher power system
b)
to help mobile and low power stations extend their usable range
c)
to transmit signals for observing propagation and reception
d)
to communicate with station in services other than amateur
39.
Q140. A band pass filter following a VHF transmitter will
a)
stop all transmitting frequencies
b)
allow all harmonics to be radiated
c)
allow all sub harmonics to be radiated
d)
pass the desired frequency range with minimum loss
40.
Q141. Spurious oscillations may be caused by
a)
self resonance of a carbon resistor
b)
self resonance in diode
c)
self resonance of an RF choke
d)
damping
41.
Q142. A spurious transmission from a transmitter is
a)
an unwated emission unrelated to the output signal frequency
b)
an unwanted emission that is harmonically related to the modulating audio frequency
c)
generated at 50Hz
d)
the main part of the modulated carrier
42.
Q143. A band pass filter will
a)
pass frequencies each side of a band
b)
attenuate low frequencies but not high
c)
attenuate frequencies each side of a band
d)
attenuate high frequencies but not low
43.
Q144. The correct order for callsign in a callsign exchange at the start and end of a transmission is
a)
the other callsign followed by your own callsign
b)
your callsign followed by the other callsign
c)
your own callsign repeated twice
d)
the other callsign repeated twice
44.
Q145. If the VFO of a transmitter is subject to varying temperatures this might caused
a)
chirp
b)
drift
c)
harmonic generation
d)
no problem
45.
Q146. A signal report of 5 and 9 indicates
a)
very low intelligibility but good signal strength
b)
perfect intelligibility but very low signal strength
c)
perfect intelligibility high signal strength
d)
medium intelligibility and signal strength
46.
Q147. At the end of the QSO you say the following
a)
73s
b)
73s and clear on frequency
c)
over and out
d)
goodnight
47.
Q148. The standard frequency offset (split) for 70 cm repeaters in Malaysia is
a)
plus 600 kHz
b)
minus 500 kHz
c)
minus 5 MHz
d)
plus 5 Mhz
48.
Q149. What kind of amateur station simultaneously retranmits the signal of other stations on a different channel
a)
repeater station
b)
space station
c)
telecommand station
d)
relay station
49.
Q150. To prevent annoying other user on a band a transmitter should always be tuned initially
a)
on a harmonic
b)
into an antenna
c)
into a dummy load
d)
on a dipole
100 %
