AmRad logo

AVALON AMATEUR RADIO CLUB


Amateur Radio Examinations
Practice Test Creator


Advanced-001 (RCF)

This paper consists of 62 questions. Duration 2 hours.
All questions have equal marks and all questions should be attempted.
Each question has 4 possible answers. Only one answer is correct, the others are wrong.

You should have the Terms, Conditions and Limitations of the Amateur Licence; and a formula sheet.
The Licence document may be used to help answer any question.
You may also use a calculator.

Please enter your full NAME:
Please enter your date of birth:
Please enter your ID number (password):
time remaining:


1: A Regional Secondary Identifier is
An Ofcom officer who keeps a list identifying local amateur stations.
That part of a packet message that contains the identity and location of the sender.
One letter in a call sign that indicates the location of the station in the UK.
The abbreviation that identifies each CEPT country on the license Validation Document.

2: Which statement relating to the use of Radio Equipment during an international disaster is MOST complete?
Full licensees may pass messages to other amateurs during an international disaster.
All UK licensees may pass messages to other amateurs during an international disaster.
All UK licensees and all non-licensees may pass messages to other amateurs during an international disaster.
Full licensees may use non-amateur frequencies if called by a station involved in an international disaster.

3: If you hold a Full Licence, you may, on your own authority
use the callsign of the owner of the radio equipment you are using
supervise a trainee using the club callsign
supervise a foreign amateur using your equipment and callsign
operate a club station using the club callsign.

4: When operating in international waters in the southern hemisphere, the frequencies you should use are given in
the schedule to the amateur licence for the closest country
the schedule to the UK amateur licence
the Radio Regulations
the Admiralty Handbook of Radio Signals.

5: A Full UK licensed amateur is on holiday in France. His callsign would be
his own call sign prefixed by F/
his own call sign prefixed by F/ and suffixed by /P
his own call sign prefixed by F/ and suffixed by /M
issued by the French licensing authority.

6: Sending a message which is grossly offensive is a breach of the
amateur licence
civil law
Wireless Telegraphy Act 2006
Content of Transmission Regulations.

7: A radio remote control link operating in an amateur band MUST be
limited to a transmitter output power not exceeding 500mW erp pep
suitably encrypted to prevent other users operating the main transmitter
failsafe to prevent unintended transmissions
restricted to frequencies in the data portion of the band plans.

8: A radio contact with another amateur lasts for 20 minutes. To comply with the licence, the callsign must be given at least
once
twice
three times
four times.

9: Licensees are required to confirm their details
annually
every three years
only when changing their postal or main station address
every five years.

10: Which of the following frequencies are available to a Full licensee on the basis of non-interference to other services outside the UK?
All frequencies in the schedule.
431.5MHz
70.435MHz
1.26GHz

11: A 12V transmitter is being tested on the bench and powered from a 12V battery. When on transmit it is noticed that the supply voltage has fallen to about 10V. This is likely to be due to the
antenna being too close to the battery and causing RF interference
power cable dropping too much voltage
internal resistance of the battery
increased losses in the transmitter.

12: The diagram shows an RC circuit and a graph showing time from switch-on on the X-axis. The Y axis should be marked

voltage across C
charge on C
time constant
voltage across R

13: Which factor below will have the greatest effect on the inductance of a coil?
Inserting a glass rod inside the coil.
Increasing the current through the coil.
Increasing the diameter of the coil.
Reducing the diameter of the wire.

14: Which quantity, A, B, C or D illustrates the RMS value of the sine wave shown?

arrow A
arrow B
arrow C
arrow D

15: The circuit shown is fed from an AC source and two of the three voltmeters show the readings obtained. What should the third meter read?

4V
5V
6V
7V

16: A simple radio receiver has a single LC tuned circuit in the collector of the RF amplifier transistor. The radio is set to receive a medium wave AM broadcast on a frequency of 600kHz and a bandwidth of 6kHz. A suitable Q-factor for the tuned circuit would be approximately
6
50
100
200

17: A balun transformer has two separate coils to provide a balanced output from an unbalanced input. The RF energy is transferred to the output due to the
mutual inductance
transformation ratio
impedance matching
symmetrical output.

18: The diagram shows a filter circuit and four frequency response curves. Which curve shows the response of the filter?

curve A
curve B
curve C
curve D

19: An RF power amplifier is rated at 100W output and a gain of 16dB. For full output power without distortion, the input should be
2.5W
5W
10W
16W

20: If the input voltage is 10V, then, given suitable component values, which circuit can give a 6V output?

circuit A
circuit B
circuit C
circuit D

21: Which configuration of transistor amplifier provides a voltage gain but no current gain?
common emitter
common base
common collector
emitter follower.

22: A mains transformer has a secondary winding rated 18V rms and feeds a half wave rectifier circuit with a single diode and a smoothing capacitor across the output. The maximum voltage across the diode on the non-conducting half-cycles will be about
18V
26V
36V
52V

23: Which type of frequency source utilises an error voltage to correct the frequency of an oscillator.
A crystal oscillator
A frequency synthesiser
Direct digital synthesiser
Beat frequency oscillator.

24: A transmitter utilises a balanced mixer to produce an SSB signal at 12MHz. To obtain an output at 144MHz the transmitter would
mix the signal with an oscillator output at 144MHz
use a frequency trippler followed by two frequency doublers.
mix the signal with another signal at 156MHz
feed the signal to a non-linear amplifier with a tuned collector load at 144MHz.

25: A UHF FM transmitter is set up to operate at 433MHz with a peak deviation of 5kHz. The maximum audio frequency is 35kHz. The bandwidth of the transmission will be approximately
7kHz
10kHz
17kHz
25kHz

26: An external power amplifier operates in class C for maximum efficiency. It would be suitable for
FM
AM and FM
AM and SSB
AM

27: The power supply voltage of a home-made transmitter is seen to drop when on transmit. Unless suitable precautions are taken there is a risk of
key clicks
over-modulation
chirp
harmonic distortion.

28: An SSB transmitter is correctly operating at 7050MHz but is a little over-modulated by an audio voice signal. There is a consequent risk of unwanted transmissions around
7.045MHz
7.065MHz
14.050MHz
14.100MHz

29: If a stage in a transceiver produces an `out of lock' signal, that signal should
inhibit the transmitter stages
indicate the receiver is off-frequency
activate the AGC circuits
activate the AFC circuits.

30: A receiver is specified as having a minimum discernable signal of 0.1V at the input (-157dBW) and a dynamic range of 86dB. It can be expected to produce just detectable spurious signals at an input level of about
11.2V (-116dBW)
2mV (-71dBW)
7.07V (0dBW)
141V (26dBW)

31: In the block diagram of a single superhet, what is the function of the block marked `X'?

frequency synthesiser
beat frequency oscillator
Detector
intermediate amplifier.

32: The gain of an IF amplifier is reduced by reducing the bias voltage close to the `knee' of the transistor characteristic curve, which also causes distortion of the signal. This distortion is removed
in the audio amplifier
by an audio frequency filter
by the intermediate frequency tuned circuits
by some other method.

33: A receiver initially picks up the wanted signal on 7.1MHz and again, weakly, when tuned to 8.7MHz. It is likely the local oscillator is now on a frequency of
7.1MHz
7.9MHz
8.6MHz
15.8MHz

34: The AGC control signal is normally derived from the
RF amplifier
detector
IF amplifier
mixer

35: In order to receive a different band, a down- converter is placed in front of an amateur receiver covering 28-30MHz. Which band may be received?

10m
6m
4m
2m

36: To minimise interference from a 2m transmitter into an FM broadcast receiver, a /4 (at 145MHz) coaxial stub is inserted across the coaxial down-lead from the receiver aerial, as shown in the drawing. The physical length of the coaxial stub will be about

34cm
52cm
77cm
102cm

37: Which drawing correctly shows the current and voltage distribution on a correctly fed quarter wave ground-plane antenna? (Further from the antenna denotes a greater value.)

Drawing A
Drawing B
Drawing C
Drawing D

38: An HF dipole is fitted with a trap in each leg to permit matching at two different frequencies. The traps should be resonant
at the higher of the two frequencies to cut off the outer section
at the higher of the two frequencies to include the outer section
at the lower of the two frequencies to cut off the outer section
at the lower of the two frequencies to include the outer section.

39: An antenna is quoted as having a Return Loss of 12dB at its centre frequency. The feeder to the shack has an attenuation of 2dB. The Return Loss measured in the shack will be
4dB
8dB
14dB
16dB

40: Which statement below best describes the function of an antenna matching unit (AMU).
An AMU removes the reactive portion of the feed impedance.
An AMU adjusts the length of the antenna to bring it to resonance.
An AMU adjusts the input impedance so that Z=50
An AMU brings the input impedance to 50 resistive and non-reactive.

41: The field strength from a UHF antenna is measured at a distance of 20m over clear ground. At twice that distance the measurement will be
much the same value
about half the first value
approximately quartered
impossible to predict.

42: Sporadic-E is a phenomenon that affects radio propagation
only below about 5MHz
up to no more than about 30MHz
well up into the VHF bands
only in UHF bands and above.

43: The maximum usable frequency is
usually within about 10% of the critical frequency
lower than the critical frequency but dependent on the actual path length
higher than the critical frequency and increases as the path length increases
higher than the critical frequency and decreases as the path length increases.

44: A transmission on top-band (160m) is found to cause interference to a domestic medium wave radio. A likely reason for this is
image channel interference
breakthrough into the RF stages of the radio
breakthrough into the IF stages of the radio
an unwanted harmonic of the transmission.

45: A broadcast transmission is suffering interference such that the unwanted interferer can also be heard in addition to the wanted signal. This effect may be due to
blocking in the receiver IF stages
cross-modulation in the RF stages
capture effect in the FM discriminator
non-linearities in the loudspeaker.

46: A neighbour's son has a CD player and audio amplifier in his room and is complaining that an amateur is causing interference. This
cannot be the fault of the amateur because no radio receiving device is present
is just hard luck, the rules only protect licensed radio users so the amateur should do nothing
is possibly caused by pickup in the loudspeaker leads.
is likely to be direct pickup in the CD head.

47: The device shown in the diagram

is a combined balun and harmonic filter
will provide impedance matching on HF
is connected in the mains supply to radio equipment
will cut the power in the event of a fault.

48: Additional protection from strong HF transmissions affecting television reception can be achieved by fitting a
low pass filter in the TV aerial lead
high pass filter in the TV aerial lead
low pass filter in the transmitter feeder
high pass filter in the transmitter feeder.

49: The chance of causing interference to nearby radio and electronic equipment can be reduced by
keeping all antennas below the line of the surrounding roofs
using minimum transmit power for the contact
using vertical polarisation wherever possible
using SSB in preference to FM.

50: Running a transmitter in a motor vehicle could
increase the risk of interference to other stations
cause a malfunction of the engine management system
increase the rate of corrosion of the vehicle bodywork
adversely affect radar operated speed cameras.

51: A neighbour advises that his new digital television is suffering interference. You should
advise that amateur transmissions can affect analogue equipment but not digital and he should contact the supplier
give the neighbour a copy of the TV interference leaflet from the RSGB EMC committee web site
suggest he contacts Ofcom to get his installation arrangements properly checked
ask if you can try out some test transmissions to see if it is likely to be your equipment.

52: The main difference between a packet mailbox and a digipeater used to pass a message to a more distant station is that
a mailbox will check each packet of the message and store it until complete whereas a digipeater forwards each packet immediately and unchecked
a mailbox will check each packet of the message and store it until complete whereas a digipeater checks only the whole message
it is necessary to specify the end to end route of a message sent to a mailbox but a digipeater is able to route messages automatically
digipeaters need to be separately licensed but any amateur can set up a mailbox as part of his or her own station.

53: You are on 433.100MHz, in contact with a mobile amateur who asks if you can hear him directly. To check that you should listen on
431.500MHz
432.500MHz
433.700MHz
434.700MHz

54: A special event station can be recognised by its callsign, which will be of the form (note `a' denotes any number and `x' any letter)
MaSxx
MBaxxx
SPaxxx
2Saxxx

55: Provided you are using the correct mode, it is considered amateur etiquette to transmit on 20m from
14.000 to 14.350MHz
14.000 to 14.089 and 14.112 to 14.350MHz
14.000 to 14.099 and 14.101 to 14.350MHz
14.000 to 14.112 and 14.125 to 14.350MHz

56: An amateur shack should have a
notice saying `no entry to unauthorised persons'
general coverage receiver for all amateur bands
residual current circuit breaker on each item of mains powered equipment
single master `off' switch for the entire installation except a ceiling mounted light.

57: The HPA provides recommendations on
the safe levels of RF exposure
immunity to RF interference
lightning protection of antenna
amateur operating procedures.

58: A significant feature of a PME mains supply to the house is that
the multiple earthing provides a better RF earth than a conventional (non- PME) mains supply
the house earth is bonded to the metal sheath of the company supply cable
the house earth wiring can, under some circumstances, rise well above true earth voltage
any RF earth in the shack must not be connected to the PME earth.

59: The diagram shows part of the circuit of an insulated gate field effect transistor amplifier. The voltage at the gate is measured with a moving coil meter having a full-scale deflection of 100A and a 100k multiplier resistor, to give a meter of 0-10V. The meter reading will be approximately

1.2V
2V
3.5V
5V

60: A heterodyne wavemeter is being used to calibrate the band edges of the 7MHz amateur band on a general coverage receiver. The wavemeter has 4 plug-in crystals for frequency reference. Which is the best crystal to select?
50kHz
100kHz
500kHz
1MHz

61: As a demonstration, the tutor wishes to show two cycles of a 10kHz signal on an oscilloscope. The graticule has 10 1cm divisions. The timebase should be set to

5S/cm
10S/cm
20S/cm
50s/cm

62: The switch marked `S' in the diagram is likely to have the front panel legend

On-Off
Hi-Lo
In-Out
Fwd-Rev.


Powered by QuizTest v3.0.31
(modified by G5FM for RSGB use)