WorksheetsRAE 200 Part 2
Total questions: 49
Worksheet time: 16mins
Name
Class
Date
1.
No. 51 What instrument can be used to determine the horizontal radiation pattern of an antenna
a)
a field strength meter
b)
a grid dip meter
c)
an oscilloscope
d)
a signal tracer and an audio amplifier
2.
No. 52 An absorbstion wavemeter can be used to check for
a)
over modulation
b)
receiver overloading
c)
band edge signals
d)
correct selection of harmonic from a multiplier circuit
3.
No. 53 Which of the following is not something you would determine with a spectrum analyzer
a)
The degree of isolation between the input and output ports of a 2 meter duplexer
b)
Whether a crystal is operating on its fundamental or overtone
c)
The speed at which a transceiver switches from transmit to receive when being used for packet radio
d)
The spectral output of a transmitter
4.
No. 54 What can a logic probe indicate about a digital logic circuit
a)
a short circuit fault
b)
an open circuit fault
c)
the resistance between logic modules
d)
the high & low logic states
5.
No. 55 The wavelength of a signal in free space with a frequency of 100 Mhz is
a)
30mm
b)
0.3m
c)
3m
d)
30m
6.
No. 56 What does a frequency counter do
a)
It makes frequency measurements
b)
It produces a reference frequency
c)
It measures FM transmitter deviation
d)
It generates broadband white noise
7.
No. 57 What does a dip-meter do
a)
it accurately indicates signal strength
b)
It measures frequency accurately
c)
It measures transmitter outpout power accurately
d)
It gives an indication of the resonant frequency of a circuit
8.
No. 58 The following unit in a DC power supply performs a smoothing operation
a)
An electrolytic capacitor
b)
A fuse
c)
A crowbar
d)
A full-wave diode bridge
9.
No. 59 Which of the following operating conditions of the power amplifier stage of a transmitter is likely to produce the highest harmonic content in the output waveform
a)
Class C
b)
Class B
c)
Class AB
d)
Class A
10.
No. 60 A mains operated DC power supply
a)
Converts DC from the mains into AC of the same voltage
b)
Converts energy from the mains into DC for operating electronic equipment
c)
Is a diode-capacitor device for measuring mains power
d)
Is a diode-choked device for measuring inductance power
11.
No. 61 A low pass filter will
a)
Suppress sub harmonics
b)
Reduce harmonics
c)
Always eleminate interference
d)
Improve harmonic radiation
12.
No. 62 A power supply is to power a solid state transceiver. A suitable over-voltage protection device is a
a)
Crowbar accross the regulator output
b)
100uF capacitor accross the transformer output
c)
fuse in parallel with the regulator output
d)
zener diode in series with the regulator
13.
No. 63 AGC stands for
a)
Amplified gain control
b)
Auxiliary gain control
c)
Automatic ganging control
d)
Automatic gain control
14.
No. 64 Over driving a power amplifier will
a)
give a high SWR
b)
give minimum distortion on receive
c)
generate excessive harmonics
d)
minimize power output
15.
No. 65 A radio wave may follow two or more different paths during propagation and produce slowly-changing phase differences between signals at the receiver resulting in a phenomenon called
a)
absorbtion
b)
baffing
c)
fading
d)
skip
16.
No. 66 The distance between the transmitter and the nearest point at which the received signal is received from ionospheric propagation is known as the
a)
skip distance
b)
radiation distance
c)
skip angle
d)
skip zone
17.
No. 67 VHF and UHF bands are frequently used for satelite communicate because
a)
Waves at the frequencies travel to & from the satellite relatively unaffected by the ionosphere
b)
The doppler frequency change caused by satellite motion is much less than at HF
c)
Satellite move to fast for HF waves to follow
d)
The Doppler effect would cause HF waves to be shifted in the VHF and UHF bands
18.
No. 68 A line of sight transmission between two stations uses mainly the
a)
ionosphere
b)
troposphere
c)
sky wave
d)
ground wave
19.
No. 69 When using voice which of the following modes of transmissios required the least bandwidth
a)
single sideband
b)
amplitude modulation
c)
frequency modulation
d)
phase modulation
20.
No. 70 The sensitivity of a receiver can be degraded by
a)
strong RF signal on a nearby frequency
b)
removing all crystals
c)
good RF filtering
d)
Incorrect adjustment of the volume control
21.
No. 71 Radio wave polarisation is defined by the orientation of the radiated
a)
magnetic field
b)
electric field
c)
inductive field
d)
capacitive field
22.
No. 72 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
23.
No. 73 The ability of a receiver to separate signals close in frequency is called its
a)
noise figure
b)
sensitivity
c)
bandwidth
d)
selectivity
24.
No. 74 What is the primary source of noise that can be heard in a VHF/UHF band receiver with an antenna connected
a)
receiver front end noise
b)
man made noise
c)
atmospheric noise
d)
detector noise
25.
No. 75 Which of the following antenna arrangements is least likely to radiate harmonics
a)
a dipole fed with coaxial cable
b)
a dipole fed with balanced feeder
c)
an inverted L Marconi with vertical feeder
d)
a trap dipole
26.
No. 76 A stage in a receiver with input and output circuits tuned to the received frequency is the
a)
RF amplifier
b)
local oscillator
c)
audio frequency amplifier
d)
detector
27.
No. 77 A communication receiver may have several IF filters of different bandwidth. The operator selcts one to:
a)
Improve the S meter readings
b)
Improve the receiver sensitivity
c)
Improve the reception of different types of signal
d)
Increase the noise received
28.
No. 78 To obtain high frequency stability in a transmitter the VFO should be
a)
Run from a non-regulated AC regulated AC supply
b)
powered from a regulated DC supply
c)
In a plastic box
d)
Able to change frequency with temperature
29.
No. 79 The side of a quad antenna is
a)
A quarter wavelength
b)
A half wavelength
c)
There quarter of a wavelength
d)
A full wavelength
30.
No. 80 The driver stage of a transmitter is located
a)
Before the power amplifier
b)
with the frequency multiplier
c)
Between oscillator and buffer
d)
After the output low-pass filter circuit
31.
No. 81 The process of modulation allows
a)
Information to be impresses on to a carrier
b)
Information to be removed from a carrier
c)
Voice and Morse code to combined
d)
None of these
32.
No. 82 The output power rating of a linear amplifier is a SSB transmitter is a specified by the
a)
peak DC input power
b)
mean AC input power
c)
peak envelope power
d)
unmodulated carrier power
33.
No. 84 Harmonic frequencies are
a)
Always lower in the frequency than the fundamental frequency
b)
At multiples of the fundametal frequency
c)
Any unwanted frequency above the fundamental frequency
d)
Any frequency causing TV
34.
No. 85 A parasitic oscillation
a)
Is an unwanted signal developed in a transmitter
b)
Is generated by parasitic elements of a Yagi beam
c)
Does not cause any radio interference
d)
Is produced by a transmitter oscillator stage
35.
No. 86 Parasitic oscillation can cause interference. They are
a)
Always the same frequency as the mains supply
b)
Always twice the operating frequency
c)
Not related to the operating frequency
d)
Three times the operating frequency
36.
No. 87 Unwanted signals from a radio transmitter which cause harmful interference to other users are known as
a)
Rectified signals
b)
Re-radiation signals
c)
Reflected sinals
d)
Harmonics signals and spurious signals
37.
No. 88 To reduce the harmonic output from a high frequency transmitter the following filter is usually installed at the the transmitter
a)
band pass
b)
low pass
c)
high pass
d)
active filter
38.
No. 89 Test should be made on one's equipment to check for harmonic radiation. These should be
a)
from time to time
b)
every 6 months
c)
at the time of renewal of license
d)
weekly
39.
No. 90 A harmonic is
a)
a whole number multiple of a frequency
b)
every 6 months
c)
at the time of renewal of license
d)
weekly
40.
No. 91 Which of the following sets of components are used to make RF filters
a)
Diodes and resistors
b)
Zener diodes and inductors
c)
LEDs and capacitors
d)
Inductors and capacitors
41.
No. 92 The correct phonetic code for the callsign 9M2MRC
a)
Nine Mike Two Mike Romeo China
b)
Nine Mike Two Mike Romeo Charlie
c)
Nine Mexico Two Mexico Radio Charlie
42.
No. 93 QRT means
a)
Close Down
b)
Stand By
c)
Fading
d)
Low Power
43.
No. 94 Define the mode 93E
a)
Phase modulated telephony
b)
Double sided telephony
c)
Single sideband, suppressed carrier, telephony
d)
Frequency modulated telephony
44.
No. 95 Frequency modulation using voice is termed
a)
F1A
b)
F3C
c)
F2A
d)
F3E
45.
No. 96 The correct phonetic code for the callsign 9M2RUK is
a)
Nine Mike Two Romeo Uniform Kilo
b)
Nine Mike Two Radio Uganda Kilo
c)
Nine Mexico Two Radio Ugly Kilo
d)
Nine Mexico Two Russia Uganda Korea
46.
No. 97 In order to minimize splatter the audio bandwidth should be restricted to
a)
1 kHz
b)
1.5 kHz
c)
2 kHz
d)
3 kHz
47.
No. 98 Earth return circuits should always be
a)
high impedance
b)
highly reactive
c)
low impedance
d)
inductive
48.
No. 99 What is a folded dipole antenna
a)
a dipole one-quarter wavelength long
b)
a type of ground-plane antenna
c)
a dipole whose ends are connectedby a one-half wavelength piece of wire
d)
a hypothetical antenna used in theoretical discussions to replace the radiation resistance
49.
No. 100 What is meant by antenna gain
a)
the numerical ratio relating the radiated signal strength of an antenna to that of another antenna
b)
the numerical ratio the signal in the forward direction to the signal in the back direction
c)
the numerical ratio of the amount of power radiated by an antenna compared to the transmitter output power
d)
the final amplifier gain minus the transmission line losses (including any phasing lines present)
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