Transmitters Multiple Choice Questions

Transmitters

1. AVC stands for ________
a) Abrupt Voltage Control
b) Audio Voltage Control
c) Automatic Volume Control
d) Automatic Voltage Control
Answer: Automatic Volume Control
2. In TV transmission, sound signal is ________ modulated.
a) Phase
b) Pulse
c) Frequency
d) Amplitude
Answer: Frequency
3. Ring Modulator is ________
a) used for DSB-SC generation
b) used for SSB-SC generation
c) used for VSB generation
d) used for AM generation
Answer: used for DSB-SC generation
4. What is Carrier swing?
a) Frequency deviation
b) Width of sideband
c) Instantaneous frequency
d) Total variation in frequency
Answer: Total variation in frequency
5. What is the role of the transmitter in the communication system?
a) to decode a signal to be transmitted
b) to convert one form of energy into other
c) to detect and amplify information signal from the carrier
d) to produce radio waves to transmit data
Answer: to produce radio waves to transmit data
6. What is the role of Amplitude limiter in the FM receiver?
a) Filteration
b) Adjust the gain of receiver
c) Amplify a weaker signal
d) Demodulate a signal
Answer: Demodulate a signal
7. What is the maximum transmission efficiency?
a) 67.88%
b) 33.33%
c) 73%
d) 54.03%
Answer: 33.33%
8. In TV transmission, picture signal is ________ modulated.
a) DSB-SC
b) VSB
c) SSB-SC
d) Pulse
Answer: VSB
9. Modulation is done in ________
a) Receiver
b) Transducer
c) Between transmitter and radio receiver
d) Transmitter
Answer: Transmitter
10. Square Law modulators are ________
a) used for frequency modulation
b) used for pulse width modulation
c) used for amplitude modulation
d) used for phase modulation
Answer: used for amplitude modulation

Standardization Of Signals

1. The nature of transient response is revealed by ______________
a) Sine wave
b) Cos wave
c) Tan wave
d) Test signals
Answer: Test signals
2. Transient response analysis is done for_________ systems.
a) Unstable
b) Stable
c) Conditionally stable
d) Marginally stable
Answer: Stable
3. To find system’s response by means of convolution integral ____________ of the system is used.
a) Sum
b) Difference
c) Exponential
d) Weighing
Answer: Weighing
4. Step signal is the signal whose values is 
a) 1 for all values greater than zero
b) Indeterminate at zero
c) It is zero for time less than zero
d) All of the mentioned
Answer: All of the mentioned
5. Standard test signals in control system are
a) Impulse signal
b) Ramp signal
c) Unit step signal
d) All of the mentioned
Answer: All of the mentioned
6. It is generally used to analyze the transient response to one of the standard test signals.
a) True
b) False
Answer: True
7. A feedback control systems has the inherent capability that its parameter can be adjusted to alter both its transient and steady state responses.
a) True
b) False
Answer: True
8. A perfect impulse has one value at zero time instant but otherwise zero elsewhere.
a) True
b) False
Answer: False
9. Ramp input 
a) Denotes constant velocity
b) Value increases linearly with time
c) It denotes constant velocity and varies linearly with time
d) It varies exponentially with time
Answer: It denotes constant velocity and varies linearly with time
10. The input signals to control systems are not known fully ahead of time, the characteristics of control system which suddenly strain a control system are
a) Sudden shock
b) Sudden change
c) Constant velocity and acceleration
d) All of the mentioned
Answer: All of the mentioned