Electrical Online Test 12
Category –EE Online Test
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Attempt Free Electrical Online Test 12 Here. Read The Important Electrical MCQ From Below.
1) If the bit rate for an ASK signal is 1200 bps, the baud rate is
a. 300
b. 400
c. 600
d. 1200
Ans. d. 1200
2) Analog-to-analog conversion is needed if the available bandwidth is _______.
a. low pass
d. 1200
c. Both
d. None
Ans. d. 1200
3) How many carrier frequencies are used in QPSK
a. 2
b. 1
c. 0
d. None
Ans. a. 2
Electrical Online Test 12
4) How many carrier frequencies are used in BFSK
a. 2
b. 1
c. 0
d. NONE
Ans. a. 2
5) How many carrier frequencies are used in BASK
a. 2
b. 1
c. 0
d. NONE
Ans. b. 1
6) _______ conversion is the process of changing one of the characteristics of an analog signal based on the information in the digital data
a. digital to analog
b. Analog to analog
c. Analog to digital
d. Digital to digital
Ans. a. digital to analog
Electrical Online Test 12
7) Which of the following is not a digital-to-analog conversion
a. ASK
b. PSK
c. FSK
d. AM
Ans. d. AM
8) Which of the following is not an analog-to-analog conversion?
a. AM
b. FM
c. PM
d. QAM
Ans. d. QAM
9) How many carrier frequencies are used in BPSK
a. 2
b. 1
c. 0
d. None
Ans. b. 1
Electrical Online Test 12
10) Given an AM radio signal with a bandwidth of 10 KHz and the highest-frequency component at 705 KHz, what is the frequency of the carrier signal?
a. 700 KHz
b. 705 KHz
c. 710 KHz
d. Cannot be determined from given info
Ans. a. 700 KHz
11) In _____ transmission, the carrier signal is modulated so that its amplitude varies with the changing amplitudes of the modulating signal
a. AM
b. PM
c. FM
d. none of the above
Ans. a. AM
12) If the baud rate is 400 for a QPSK signal, the bit rate is ________ bps
a. 100
b. 400
c. 800
d. 1600
Ans. c. 800
Electrical Online Test 12
13) FCC stands for
a. Federal communication commission
b. frequency communication commission
c. Fourier communication commission
d. none of the above
Ans. a. Federal communication commission
14) In _________, the frequency of the carrier signal is varied to represent data. Both peak amplitude and phase remain constant
a. ASK
b. PSK
c. FSK
d. QAM
Ans. c. FSK
15) In _______, the peak amplitude of one signal level is 0; the other is the same as the amplitude of the carrier frequency
a. PSK
b. OOK
c. FSK
d. NONE
Ans. b. OOK
Electrical Online Test 12
16) ________ uses two carriers, one in-phase and the other quadrature
a. ASK
b. PSK
c. FSK
d. QAM
Ans. d. QAM
17) The constellation diagram of BPSK has ______ dots
a. 2
b. 1
c. 0
d. None
Ans. b. 1
18) In ________, the amplitude of the carrier signal is varied to create signal elements. Both frequency and phase remain constant
a. ASK
b. PSK
c. FSK
d. QAM
Ans. a. ASK
Electrical Online Test 12
19) If the bit rate for an FSK signal is 1200 bps, the baud rate is
a. 300
b. 400
c. 600
d. 1200
Ans. d. 1200
20) Quadrature amplitude modulation (QAM) is a combination of ____
a. ASK and FSK
b. ASK and PSK
c. PSK and FSK
d. none of the above
Ans. b. ASK and PSK
21) In ________, the phase of the carrier is varied to represent two or more different signal elements. Both peak amplitude and frequency remain constant
a. ASK
b. PSK
c. FSK
d. QAM
Ans. b. PSK
Electrical Online Test 12
22) The constellation diagram of BASK has ______ dots.
a. 2
b. 1
c. 0
d. None
Ans. a. 2
23) In _____ transmission, the phase of the carrier signal is modulated to follow the changing voltage level (amplitude) of the modulating signal
a. AM
b. PM
c. FM
d. NONE OF ABOVE
Ans. a. AM
24) A constellation diagram shows us the __________ of a signal element, particularly when we are using two carriers (one in-phase and one quadrature)
a. amplitude and phase
b. Amplitude and frequency
c. frequency and phase
d. None of the above
Ans. a. amplitude and phase
25) _________ conversion is the representation of analog information by an analog signal.
a. Digital to analog
b. analog to analog
c. analog to digital
d. Digital to digital
Ans. b. analog to analog
Electrical Online Test 12
