Frequency, Harmonics, Wavelength, Bandwidth, Bands
Basic Qualification Question Bank for Amateur Radio Operator Certificate Examinations 12 June, 2014

Frequency

(D)

B-005-007-001 What term means the number of times per second that an alternating current flows back and forth?
A Speed
B Pulse rate
C Inductance
D Frequency

(A)
B-005-007-002 Approximately what frequency range can most humans hear?
A 20 - 20 000 Hz
B 20 000 - 30 000 Hz
C 200 - 200 000 Hz
D 0 - 20 Hz

(C)
B-005-007-003 Why do we call signals in the range 20 Hz to 20 000 Hz audio frequencies?
A Because this range is too low for radio energy
B Because the human ear can sense radio waves in this range
C Because the human ear can sense sounds in this range
D Because the human ear cannot sense anything in this range

(C)
B-005-007-004 Electrical energy at a frequency of 7125 kHz is in what frequency range?
A Hyper
B Super-high
D Audio

(B)
B-005-007-008 What does 60 hertz(Hz) mean?
A 6000 cycles per second
B 60 cycles per second
C 6000 metres per second
D 60 metres per second

(D)
B-005-007-009 If the frequency of the waveform is 100 Hz, the time for one cycle is:
A 10 seconds
B 0.0001 second
C 1 second
D 0.01 second

(C)
B-005-007-010 Current in an AC circuit goes through a complete cycle in 0.1 second. This means the AC has a frequency of:
A 100 Hz
B 1000 Hz
C 10 Hz
D 1 Hz

Harmonics

(B)

B-005-007-011 A signal is composed of a fundamental frequency of 2 kHz and another of 4 kHz. This 4 kHz signal is referred to as:
A a dielectric signal of the main signal
B a harmonic of the 2 kHz signal
C a fundamental of the 2 kHz signal
D the DC component of the main signal

Wavelength

(A)

B-005-007-005 What is the name for the distance an AC signal travels during one complete cycle?
A Wavelength
B Wave speed
C Waveform

(C)
B-005-007-006 What happens to a signal's wavelength as its frequency increases?
A It stays the same
B It disappears
C It gets shorter
D It gets longer

(B)
B-005-007-007 What happens to a signal's frequency as its wavelength gets longer?
A It goes up
B It goes down
C It disappears
D It stays the same

Bandwidth

(C)

B-001-016-001 What is the maximum authorized bandwidth within the frequency range of 50 to 148 MHz?
A The total bandwidth shall not exceed that of a single-sideband phone emission
B The total bandwidth shall not exceed 10 times that of a CW emission
C 30 kHz
D 20 kHz

(C)
B-001-016-002 The maximum bandwidth of an amateur station's transmission allowed in the band 28 to 29.7 MHz is:
A 30 kHz
B 15 kHz
C 20 kHz
D 6 kHz

(B)
B-001-016-003 Except for one band, the maximum bandwidth of an amateur station's transmission allowed between 7 and 28 MHz is:
A 30 kHz
B 6 kHz
C 15 kHz
D 20 kHz

(A)
B-001-016-004 The maximum bandwidth of an amateur station's transmission allowed in the band 144 to 148 MHz is:
A 30 kHz
B 6 kHz
C 20 kHz
D 15 kHz

(C)
The maximum bandwidth of an amateur station's transmission allowed in the band 50 to 54 MHz is:
A 6 kHz
B 15 kHz
C 30 kHz
D 20 kHz

(D)
B-001-016-006 Which of the following bands of amateur frequencies has a maximum allowed bandwidth of less than 6 kHz. That band is:
A 18.068 to 18.168 MHz
B 24.89 to 24.99 MHz
C 1.8 to 2.0 MHz
D 10.1 to 10.15 MHz

(B)
B-001-016-007 Single sideband is not permitted in the band:
A 7.0 to 7.3 MHz
B 10.1 to 10.15 MHz
C 18.068 to 18.168 MHz
D 24.89 to 24.99 MHz

(C)
B-001-016-008 What precaution must an amateur radio operator take when transmitting near band edges?
A Make sure that the emission mode is compatible with agreed band plans
B Watch the standing wave ratio so as not to damage the transmitter
C Ensure that the bandwidth required on either side of the carrier frequency does not fall out of band
D Restrict operation to telegraphy

(C)
B-001-016-009 Which of the following answers is not correct? Based on the bandwidth required, the following modes may be transmitted on these frequencies:
A 300 bps packet on 10.145 MHz
B fast-scan television(ATV) on 440 MHz
C fast-scan television(ATV) on 145 MHz
D AMTOR on 14.08 MHz

(B)
B-001-016-010 Which of the following answers is not correct? Based on the bandwidth required, the following modes may be transmitted on these frequencies:
A single-sideband(SSB) on 3.76 MHz
B fast-scan television(ATV) on 14.23 MHz
C slow-scan television(SSTV) on 14.23 MHz
D frequency modulation(FM) on 29.6 MHz

(D)
B-001-016-011 Which of the following answers is not correct? Based on the bandwidth required, the following modes may be transmitted on these frequencies:
A frequency modulation(FM) on 29.6 MHz
B Morse radiotelegraphy(CW) on 10.11 MHz
C 300 bps packet on 10.148 MHz
D single-sideband(SSB) on 10.12 MHz

Bands

(D)

B-001-015-005 In Canada, the 75/80 metre amateur band corresponds in frequency to:
A 3.0 to 3.5 MHz
B 4.0 to 4.5 MHz
C 4.5 to 5.0 MHz
D 3.5 to 4.0 MHz

(A)
B-001-015-006 In Canada, the 160 metre amateur band corresponds in frequency to:
A 1.8 to 2.0 MHz
B 1.5 to 2.0 MHz
C 2.0 to 2.25 MHz
D 2.25 to 2.5 MHz

(A)

B-001-015-007 In Canada, the 40 metre amateur band corresponds in frequency to:
A 7.0 to 7.3 MHz
B 6.5 to 6.8 MHz
C 6.0 to 6.3 MHz
D 7.7 to 8.0 MHz

(A)
B-001-015-008 In Canada, the 20 meter amateur band corresponds in frequency to:
A 14.000 to 14.350 MHz
B 13.500 to 14.000 MHz
C 15.000 to 15.750 MHz
D 16.350 to 16.830 MHz

(D)
B-001-015-009 In Canada, the 15 metre amateur band corresponds in frequency to:
A 18.068 to 18.168 MHz
B 14.000 to 14.350 MHz
C 28.000 to 29.700 MHz
D 21.000 to 21.450 MHz

(B)
B-001-015-010 In Canada, the 10 metre amateur band corresponds in frequency to:
A 50.000 to 54.000 MHz
B 28.000 to 29.700 MHz
C 24.890 to 24.990 MHz
D 21.000 to 21.450 MHz

(C)