This set of Flexible Manufacturing System Multiple Choice Questions & Answers (MCQs) focuses on “Analog to Digital Converters”.
1. Which of the following process is used to remove random noise and to convert one signal form to another?
a) Inverting
b) Moderating
c) Regulating
d) Signal Conditioning
View Answer
Explanation: The process which is used to remove random noise from the signal is known as Signal Conditioning. It can also be used to convert one form of signal into another form.
2. Which of the following devices is used to scale up or scale down the incoming signal?
a) Modulator Relay
b) Electromechanical Relay
c) Amplifier
d) Exciter
View Answer
Explanation: The device which is used to scale up or scale down the incoming signal is known as amplifier. This is done for the incoming signal to be compatible with the range of analog to digital converters.
3. Which process consists of converting the continuous signal into a series of discrete analog signals at periodic intervals?
a) Terminating
b) Modulating
c) Regulating
d) Sampling
View Answer
Explanation: The process which consists of converting the continuous signal into a series of discrete analog signals at periodic intervals is known as sampling. Terminating, Regulating and Sampling processes do not convert the continuous signal into a series of discrete analog signals at periodic intervals.
4. Which process involves assigning discrete analog signal to a finite number of previously defined amplitude levels?
a) Quantization
b) Sampling
c) Encoding
d) Decoding
View Answer
Explanation: The process which involves assigning discrete analog signal to a finite number of previously defined amplitude levels is known as quantization.
5. The Minimum error will occur when the true value of the analog signal is on the borderline between two adjacent quantization levels.
a) False
b) True
View Answer
Explanation: Maximum error will likely occur when the true value of the analog signal is on the borderline between two adjacent quantization levels. This maximum error has to be reduced by varying the true value of the analog signal on the borderline between two adjacent quantization levels.
6. Which of the following process involves converting the amplitude levels obtained during quantization into digital codes?
a) Encoding
b) Moderating
c) Regulating
d) Signal Conditioning
View Answer
Explanation: The process which involves converting the amplitude levels obtained during quantization into digital codes is known as encoding. This process represents the amplitude level as a sequence of binary digits.
7. Which is defined as the rate at which the continuous analog signals are sampled?
a) Process Rate
b) Converter Rate
c) Sampling Rate
d) Exciter Rate
View Answer
Explanation: The rate at which the continuous analog signals are sampled or polled is known as sampling rate. Process Rate, Sampling Rate and Exciter Rate are not defined by the sampling of continuous analog signals.
8. Which of the following limits the maximum possible sampling rate of an ADC?
a) Terminating Time
b) Modulating Time
c) Regulating Time
d) Conversion Time
View Answer
Explanation: The maximum possible sampling rate is limited by the conversion time of an Analog to Digital Converter. It is the time interval between the application of incoming signal and the determination of the digital value.
9. Which is defined as the precision with which the analog signals are evaluated?
a) Quantization
b) Sampling
c) Encoding
d) Resolution
View Answer
Explanation: The parameter with which the analog signals are evaluated is known as resolution. It is determined by the number of quantization levels. Quantization, Sampling and Encoding processes were not defined by the precision with which the analog signals are evaluated.
10. Which is defined as the length of each quantization level in an ADC?
a) Quantization Space Length
b) Sampling Level Spacing
c) Encoding Level Spacing
d) Quantization Level Spacing
View Answer
Explanation: The parameter which defined as the length of each quantization level in an analog to digital converter is known as Quantization Level Spacing. It determines the resolution of an ADC.
11. How much will be the maximum sampling rate for each input line if the maximum sampling rate of ADC is 2850 samples/sec and there 5 input channels through the multiplexer?
a) 5
b) 570
c) 285
d) 50
View Answer
Explanation: Given, maximum sampling rate of ADC = 2850 samples/sec
Number of input channels = 5
To Find: Maximum sampling rate for each input line
Solution:
Maximum sampling rate for each input line = maximum sampling rate of ADC/Number of input channels
= 2850/5
= 570 samples/sec.
12. Quantization is twice the quantization line spacing.
a) True
b) False
View Answer
Explanation: Quantization is one half of the quantization line spacing. It is a combination of digital representation by introducing the limits on the precision and range of values by approximating the real world values.
13. Which conversion method is widely used to encode an analog signal into digital equivalent?
a) Quantization Method
b) Virtual Error Method
c) Encode Leveling Method
d) Successive Approximation Method
View Answer
Explanation: Successive Approximation method is widely used to encode an analog signal into digital equivalent. It involves comparing the known series of trial voltages with the known value of input signal.
Sanfoundry Global Education & Learning Series – Flexible Manufacturing System.
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