BSNL TTA Network Filters And Transmission
Category –BSNL Online Test
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Attempt Free BSNL TTA Network Filters And Transmission Here. Read The Important BSNL MCQ From Below.
1) A ________ filter passes all frequencies within a band between a lower and an upper critical frequency and rejects all others outside this band
a. Low-pass
b. High-pass
c. Band-pass
d. Band-stop
Ans. c
2) Filters with the ________ characteristic are useful when a rapid roll-off is required because it provides a roll-off rate greater than –20/dB/decade/pole.
a. Butterworth
b. Chebyshev
c. Bessel
d. None of these
Ans. b
3) In filters, a single RC network is called a pole.
a. True
b. False
Ans. a
4) A low-pass filter has a cutoff frequency of 1.23 kHz. Determine the bandwidth of the filter.
a. 2.46 kHz
b. 1.23 kHz
c. 644 Hz
d. Not enough information given
Ans. b
BSNL TTA Network Filters And Transmission
5) In an RC low-pass filter, the output voltage is taken across the resistor and the output lags the input voltage.
a. True
b. False
Ans. b
6) Filters with Bessel characteristics are used for filtering pulse waveforms.
a. True
b. False
Ans. a
7) A band-pass filter rejects all frequencies within a band between a lower and an upper critical frequency and passes all others.
a. True
b. False
Ans. b
8) The critical frequency is defined as the point at which the response drops ________ from the passband.
a. –20 dB
b. –3 dB
c. –2 dB
d. –6 dB
Ans. b
BSNL TTA Network Filters And Transmission
9) In a certain parallel resonant band-pass filter, the resonant frequency is 14 kHz. If the bandwidth is 4 kHz, the lower frequency is
a. 4 kHz
b. 7 kHz
c. 12 kHz
d. 10 kHz
Ans. c
10) Filters with the ________ characteristic provide a very flat amplitude in the passband and a roll-off rate of –20 dB/decade/pole.
a. Butterworth
b. Chebyshev
c. Bessel
d. None
Ans. a
11) Which filter exhibits a linear phase characteristic?
a. Bessel
b. Butterworth
c. Chebyshev
d. All of these
Ans. a
BSNL TTA Network Filters And Transmission
12) A ________ filter significantly attenuates all frequencies below fc and passes all frequencies above fc.
a. Low-pass
b. High-pass
c. Band-pass
d. Band-stop
Ans. b
13) A ________ filter rejects all frequencies within a specified band and passes all those outside this band.
a. Low-pass
b. High-pass
c. Band-pass
d. Band-stop
Ans. d
14) A Sallen-Key filter is a second-order filter.
a. True
b. False
Ans. a
15) Which filter has a maximally flat response?
a. Bessel
b. Butterworth
c. Chebyshev
d. All of these
Ans. b
BSNL TTA Network Filters And Transmission
16) The bandwidth of a band-pass filter is the sum of the two cutoff frequencies.
a. True
b. False
Ans. b
17) In an RL high-pass filter, the output is taken across the inductor and the output leads the input.
a. True
b. False
Ans. a
18) In a certain low-pass filter, fc = 3.5 kHz. Its passband is
a. 0 Hz to 3.5 kHz
b. 0 Hz
c. 3.5 kHz
d. 7 kHz
Ans. a
19) Filters with the ________ characteristic are used for filtering pulse waveforms.
a. Butterworth
b. Chebyshev
c. Bessel
d. All of these
Ans. c
BSNL TTA Network Filters And Transmission
20) A third-order filter will have a roll-off rate of
a. –20 dB/decade.
b. –40 dB/decade.
c. –60 dB/decade.
d. –30 dB/decade.
Ans. c
21) One important application of a state-variable ________ filter with a summing amplifier is to minimize the 60 Hz “hum” in audio systems.
a. Low-pass
b. High-pass
c. Band-pass
d. Band-stop
Ans. d
22) A band-stop filter passes frequencies between its lower and upper critical frequencies and rejects all others.
a. True
b. False
Ans. b
23) In a series resonant b and-pass filter, a lower value of Q results in
a. A higher resonant frequency
b. A smaller bandwidth
c. A higher impedance
d. a larger bandwidth
Ans. d
BSNL TTA Network Filters And Transmission
24) Which filter exhibits the most rapid roll-off rate?
a. Bessel
b. Butterworth
c. Chebyshev
d. All of the these
Ans. c
25) A band-pass filter can be created by cascading a high-pass filter and a low-pass filter.
a. True
b. False
Ans. a
26) Critical frequencies are also called –3 dB frequencies.
a. True
b. False
Ans. a
27) An active filter uses capacitors and inductors in the feedback network.
a. True
b. False
Ans. b
28) The bandwidth of a band-pass filter is the sum of the two cutoff frequencies.
a. True
b. False
Ans. b
BSNL TTA Network Filters And Transmission
29) The bandwidth of a resonant filter is determined by the quality factor (Q) of the circuit and the resonant frequency.
a. True
b. False
Ans. a
30) The bandwidth of a practical high-pass filter is infinite.
a. True
b. False
Ans. b
BSNL TTA Network Filters And Transmission
