QADV Practice Paper 2
for the RCF Advanced Level Exam
in Radio Communications
Version 8
This exam consists of a single paper with 62 questions
You
will need
Reference Data Booklet
Optical Mark Sheet
calculator
pencil and soft rubber
black pen
Try to set aside 2 hours when you will not be distracted by phone calls, pets, children,
cups of tea. Before you begin, visit the loo.
1
Go through the whole paper, answering all the questions you are sure of by lightly
making a small pencil mark in the appropriate box on the Optical Mark Sheet.
2
Go through the paper a second time.
Think about each question and answer it if you can.
3 Go through the paper a third time.
For each question still unanswered, eliminate any option you know is wrong.
Then make an intelligent guess at the correct answer.
Marks are not delucted for wrong answers, so leave no question unanswered.
4
Look over your answers, and check the calculations.
If you change your mind, rub out the original pencil mark and try again.
5
During the last 10 minutes of the exam,
cover each pencil mark by filling in the box with your black pqn.
Once a box has been inked in, the answer cannot be changed.
Staft time
Duration 2
hours
Finish time
You can do any calculations on the back of this question paper.
In the'proper'exam, everything will be handed in.
Reference Data Booklet and Optical Mark Sheet can be downloaded from
http : //freespace.vi rq i n. net/mu rray. g3kzb
This website also gives details of other Practice Papers.
G3KZB @ ZOr+ QADVpp2vB
A Licensee may append the suffix
callsign when operating
A
with hand-held equipment
B
from a temporary location
C
away from mains power
D
from a parked vehicle
-/P'to the
5
What frequency bands are available to a Full
UK Licensee operating /.}lll in international
waters?
A
B
The bands
dlo*d
C
The bands allo*d by the ITU in the
region where the rcsel is located.
D
The bands set a$de by the ITU for
/MM operations.
for use in the UK.
The top lOkltz deach band in
Schedule 1 dthe Ucence.
In which of the following happeniqgs rnay
a Licensee use the Radio Equipment to 6ist
communications?
In times of (1) national emeryency
(2) international emergency
(3) disasten
A
(1) and (2) only.
B
(1) and (3) only.
c
(2) and (3) only.
D
All three of them.
5
Which of the following conditions apply to
il)esags sent by UK Amateurc?
(1) They must be in English
(2)
(3)
A
B
C
D
They must be un-encrypted
They must be free of menace
(1) and (2) only.
(1) and (3) only.
(2) and (3) only.
All three of them.
If the Ucensee controls the equipment, under
what circr.rmstanes may a non-licensed
person talk into the mioophone?
A
B
C
D
Whidr one of the following restridiorrs applies
to the Remote Control of Rdlo Equiprnent by
a Full Licence holder?
Under no circumstances.
Only if the Licensee holds a
Full Licence.
A
The control signal must not exceed
0'5 watts in power.
Only if the Licensee holds a
Intermediate or Full Licence.
B
It must not allow other Amateurs
If the Licencee holds any UK
Amateur Radio Licence.
C
unsupervised use of the Equipment.
It must only be used with a Club
callsign.
D
A NoUce of Variation to the Licence
must be obtained for Ofcom,
When must a'Maritime Mobile' operation
cease?
A
The callsign given in the Licence, together
with a Regional Secondary Location if
appropriate, must be transmitted at intervals
not exceeding
If the vessel is carrying flammable
cargo.
B
C
D
When entering harbour or canal.
In a designated danger area.
On the instruction of the vessel's
master.
PP2page2
A
B
C
D
10 minutes
15 minutes
30 minutes
45 minutes
The frequency of a transrnission must be as
stable as
A
technical development reasonably
permits
B
1 part in 100,0O0
C
required by a duly authorized officer
of Ofcom
D
necessary to prevent undue
interference ts users on adjacent
frequencies
On this graph voltage lags current by
10 Which one of the following bands has an
allocation to the Amateur Satellite Service?
A
C
D
11
1.810
3,500 50;OO 144"0 -
l
2,000 MHz.
L2.
Rr
2700
D
3600
R2
B
D
Which capacitor decouples this amplifier from
the rest of the circuit?
200ka.
ACa
400ko.
CCc
BCb
DCd
16 Which one of the following is decreased if a
damping resistor is added to a resonant
circuit?
60pf
A
B
C
D
The comhined capacitance of these two
capacitors in series is
A
sqf_
B
l0pf
C
129t
D
15pf
13 A circuit consisting of a resistor and inductsr
in series has a time constant of 12rnsecs.
After voltage is applied, the final value of the
current will be reached after approximately
90msecs
c
Eoorc
300ka.
30msecs
1800
146,O MHz.
-{Hl-
A
C
B
15
52.00 MHz.
100ko.
2Opf
900
3,800 MHz.
In this figure, what value of Rz will make the
fphagg at the junction of Rr and Rz 3V?
A
c
A
B
D
60msecs
120msecs
PP2page3
Bandwidth.
Q factor.
Resonant frequenry.
Phase angle.
a7 A 15 ohm loudspeaker is driven frsm a
6,000 ohm source.
What ratio of transformer is required?
A
5:1
B
20:
C
250e1
D
5OO:
1
1
18 The cut-off frequency of a low-pass filter is
defined as the frequency at which the output
voltage has fallen to
A
0"404 of its maximum value
0.5OS of its maximum value
0.606 of its maximum value
D
0"707 of its maximum value
This is the circuit of a
19
A
buffer amplifier
B
frequenry synthesiser
12 times.
C
crystal oscillator
27 times.
D
va
The power gain of an amplifier is 9dB.
By how many times is the power increased?
A
B times.
C
18 tirnes.
B
D
20 If the reverse bias on a varicap diode is
24
increased, then
2L
A
the depletion layer is widened and
the capacitance is increased
B
the depletion layer is narowed and
the capacitance is increased
C
the depletion layer is widened and
the capacitance is decreased
D
the depletion layer is narrowed and
the capacitance is decreased
In which class of transistor amplifier does
collector current flow all the time that
Class A.
Class B.
B
D
A
B
C
D
Class C.
current
increase
A
B
C
D
decrease
increase
decrease
32.0 to 32.3 MHz
40.5 to 40.8 MHz
1.5 kHz
3kHz
6kHz
12 kHz
electrons emitted?
A
B
C
D
duration of curent
increase
increase
decrease
decrease
23.5 to 23.8 MHz
26 From which part of a triode valve are
rectifier?
peak
6.0 to 6.3 MHz
25 The bandwidth of an amateur AM signal is
approximately
Class AB.
22 If the smoothing capacitor in a half-wave
rectifier circuit is in increased in size, what
will happen to the current through the
Within a transmitter, a modulated signal is
produced on 10.0 MHz.
To give an output on B0 metres (3.5 to
3.8 MHz) it is mixed with a synthesiser
signal on 13.5 to 13.8 Mhz.
Also produced (and filtered out) is an
unwanted mixer product on
A
B
C
D
voltage is apptied?
A
C
riable frequency oscil latcr
PP2page4
Anode.
Grid.
Cathode.
Heater.
2V
WitFr which rnode of transmission is the
'chirp' associated?
A.
B
C
D
23
29
What happens if two IF coils are overcoupled?
A
B
C
D
AM.
558,
FM.
to
B3
An AGC voltage is produced.
The response has a dip at its centre,
Sensitivity is at a maximurn.
Self oscillaticn occurs.
Doubre superhet receivers have
A'
separate the CTCSS sub-audible tone
from speech entering a repeater
A
B
a low first IF for image rejection and
a ftigh second IF for selectivity
reduce excessive bandwidth caused by
overdriving a linear amplifier
B
C
a low first IF for selectivity and
a high second IF for image rejection
remove one particular hantoaie from
the output of a transrnitter
C
D
a high first IF for irnage rejeetion and
a low second IF for selectivity
remove 5O Hz mains hum from an
audis stage
D
a high first IF for selectivity and
a low second IF for image rejection
From which part of a frequency synthesiser is
the'out-of-lock' ind icator obtai ned?
34
Crystal reference oscillator.
As well as altering the gain, the AGC circuit
in a receiver can also be used to
A
B
C
D
Programmable divider.
Phase comparator.
Voltage controlled oscillator.
drive the S meter
change the receiver bandwidth
imprcve the SWR
rernove splkes of interference
'SINAD'in a receiver is related to its
A
B
C
D
3l
32
CW,
A notch filter can be used
A
B
C
D
30
fault
selectivity
?5 what does the Rlr contror on a receiver do?
A Varies the receiver bandwidth.
B Tunes the receiver over a narrow
dynamic range
signal to noise ratio
image
rejection
In a superhet SSB receiver, how is the
produced?
A, The IF mixes with the CIO.
B The RF rnixes with the IF.
C The LO mixes with the RF.
D The CIo mlxes with the Lo.
range.
audio
PP2pase5
C
D
Limits the peak value of the RF.
Allows pa$icular frequencies to be
stored in memory.
40
36
The'roller coaster'form of variable inductor
is commonly found in
8 turns-
A
B
C
D
--,"u'
This is the diagram of a
1
B
braid breaker
C
IF transformer
D
harmonic filter
4L
an oscilloscope
a transve*er {HF to/from \lHF}
The amount of electromagnetic energy
falling on an area of 1 square metre is
called the
A
B
C
D
37 The feed point impedance of a loaded vertial
five-eights wavelength antenna is
approximately
field strength
velocity factor
power flux density
incident power
37f,.
42
50a
c
D
a Standing Wave Ratio meter
: 1 balun
A
A
an Antenna Matching t"Init
Ionisation in the atmasphere is caused by
A
B
73{2
300a
the earth's magnetic field
jet streams where the troposphere
and stratosphere meet
38 The'traps'in
A
E
C
D
39
C
D
a HF trap dipole antenna are
low pass filters
43
series tuned circuits
Vr-Vr
Vr xVr
Vr*
Vr-
Vr
Vr
B
Vr
Vr
D
Vr xVr
Vf *Vr
The longest range obtainable by ground wave
propagation is norrnally over
A
B
C
D
parallel tuned circuits
voltages measured on a Standing tl/ave
Ratio meter.
The SWR =
C
over-the-horizon radars
high pass filters
Vr and Vr are the forward and reverse
a
solar emissions
-Vr
44
*Vr
deserts
seas
mountains
rain forests
When a receiver is tuned to Fr a faint signal
on a higher frequency of Fi can be heard at
the same time.
What is the frequency of the local oscillator?
* Fr
Fi -Fr
Fi-fr
C
PP2page6
Fi
*Fr
.Ft
D
Fr*Fr
2
45
49
1#hy is an FM signal less likely to cause
cross-modulation in receivers than other
modes of rnodulation?
A
.
B
C
The amplitude of the carrier remains
canstant.
A
B
C
D
None of the power is contained in
sidebands.
It is not possible for an F$tl signal to be
over-modulated.
D
The duty rycle of the carrier is smalf.
50
46 Tests have shown that a base-emitter
junction in an audio amplifier is acting as a
rectifier for an RF signal,
Te cure the interference, which one of the
following capacitors should be wired across
the base-ernitter leads?
A
B
C
D
47
B
C
D
43
lnF disc ceramic"
D
1O00pF electrolytic.
2.08 volts per metre.
3.12 volts per metre.
4.26 volts per metre.
Head and rear lights.
Engine mafiagement system.
Front and rear screen wipers and
washers.
In-c:r broadcast radio.
10pF polystyrene.
51 if a Radio Amateur's
lpF polyester.
signals are causing
problems on a neighbour's computer and the
neighbour is not willing to cooperate in
finding a cure, the Amateur should advise
him to contact
in alternate wines on alternate cycles
of AC
in both wires but in oppesite directions
only in one wire
A
B
C
D
in the same direction in both wires
If a 2 metre signal is breaking through ento a
TV, what should be fitted in the TV downlead
to prevent this?
A
B
C
D
1.O4 volts per metre.
In which part cf a car's electrics does induced
RF pose the greatest hazard?
A
B
C
In a cable containing two wires, a cornmon
rnode current flows
A
A 40 watt transmitter is feeding an antenna
with a gain of 6dB through a feeder with a
3db loss.
What is the field strength 50 rnetres from the
antenna?
RSGB
Ofeom
Citizens Advice Bureau
Trading Standard Department of
the local council
52 By which of the following ways can a Packet
Radio message reach its destination?
(1) directly if within range
(2] via a mailbox
(3) using a digipeater
Balun"
A
(1) and (2) only.
B
(1) and {3} only.
C
{2} and {3} only.
D
All three ways.
Attenuator.
N-ow-pass
filter.
High-pass filter.
PPZpageT
53
What happens when a repeater'times
out'?
A
rt is crosed down by the
B
lts Notice of Variation is revoked
Keeper.
by
C
57 The less RF radiation
Repeater
iXBTir'=inffffi'.;:J$'["'L""1:'l?:"to'
A 14 volts per metr€
B 28 volts per metre
C 42 volts per metre
D 55 volts per metre
Ofcom.
It transmits the current time in the
format used by MSF.
D
to which an adult is
It stops re-transmitting the incoming
signal.
58 In a PME mains wiring system, Brc neutral
conductor is
54
Intermodulation prcducts generated within
receiver can be minimised by
A
B
C
D
switching in an
reducing the audio output
increasing the IF
bandwidth
t44.4OA
145.20O
to
145.5935 MHz.
145.800
to
146-OOO
to
59
satellite
MHz.
to 144,490 MHz.
144.O00
isolated from earth
conne&d to earth at the
electricity
attenuator
part of the 2m band do
commu nications take place?
t5
A
B
turning back the squelch
55 In which
A
B
C
D
a
C
conneeted b erth B'herc the supply
enters tlle house
D
connected to earth at the
electricity generator
How can a high voltage be measured with a
IOOU,E moving coil rneter?
A
By mrnedir1g a high value rcsistor
-n pamlH with iL
B
By
C
By connecting a high value resistor
in series with it.
D
By connecting a low value resistor
in series with it.
144-11O
MHz.
suMion
onrHing a low value resistor
in parallel with it.
ltlhy is special care neded when dealing with
equipment containing thermionic valves?
5O The ovemll acuracy of a digital frequency
A
B
Valves are mechanically
counter
Valved equipment
voltages.
C
D
Large currents are involved,
A
B
C
D
fragile.
contains high
Replacement valves are now diffieult
to
obtain,
PP2pageS
Ls
limited by
tte
number of digiB on the dispLay
stability of the gate time
input im@ance
losses in the prcbe
61 What happens when the knob labelled
'Y GAIN'on an oscilloscope is turned
anti-clockwise?
cf the trace is slower.
A
Each srrreep
B
The whole cf the trace rnoves down.
C
The height sf the trace decreases.
D
The trace becomes fainter.
62
This drawing shows a current transformer
asfound in an SWR meter.
The earthed braid of the csax
A
B
C
D
reduces eddy currents
maximises the sensitivity
prevents voltage flashover
minimises capacitive coupling
End of questions
PP2pageg
QADV Practice Pa per 2 Answer Key
Syllabus section
:
Advance! The Full Licence Manual page
Reference Data Booklet page
I
2a.7
4
5
6
7
B
8
B
C
C
3f.3
13
39.3
3h.3
t4
B
B
27
28
29
30
31
328
33C
34A
3sB
5
3i.4
3j.2
3n.7
3p.1
C
B
c
c
4
28
30
32
32
c
C
C
Ab.t 47
4e.1 52
4f .2 44,6t
4hi
ss
A
45
46
47
48
A
A
49
50
51
52
A
57
58
59
60
61
62
4h.3 57, 92
4h.6 47, 48
4j.3 61
4k.t 67, 68
4n.2
4n.1
4p.1
40
4L
42
43
44
53
54
55
56
40
35
43
A
B
D
C
c
C
B
D
11
23
26
27
49.3
36
37
38
39
5
3k.1 91
3o.1 1O2
3n.3 36
18
19
20
2L
22
23
24
25
26
3
2f.1 810
2g.t 9 6
2h.1 9 6,7
3d.1
3e.5
t2
2
2e.1 7
2i.1 zJ.t 10
9
10
11
15
16
17
10
zb.t B
2c.7 6
2d.t 7
2
3
D
D
7c.L
7e.\
7f .L
Ba.l
D
8b.1
12
D
Bc.1
Be.1
89
13
74
D
B
B
B
9a.4
B
B
c
c
B
c
D
4r.l
This Practice Paper is based on
Advanced Exam Syllabus Issue 3, 2OO7 (RCF)
Advance! the Full Licence Manual 3rd edition, 20A7 (RSGB).
PP2page10
5e.1 79
6a.2 B0
6b.2 81
6c.1 83
7a.L 90
7a.2 89
7a.4 94
7b.2 93
7b.5 97,92
65
63
55
Version B. Nov 2014
5b.1 7t
5c.3 75
5c.5 77
5d.1 73
9c.1
9f.1
86
16
95
11
16
17, 95
10a.1 96
10b.2 101
10c.1 100
10e.1 98