Electrical measurements MCQ Quiz Hub

1. Before and after each test, calibration is carried out.
True
False
all of the above
None of the mentioned

2. A/D converter is used for _____
converting analog to digital
converting digital to analog
converting digital to mixed signal mode
converting analog to mixed signal mode

3. Output of A/D converter is ______
given to an analog display
given to a digital display
given to a CRO
given to a voltmeter

4. What are auxiliary equipments?
equipment
guard rings
devices
voltage source

5. What is the main function of auxiliary equipment?
unit step response
ramp response
non-linear response
linear response

6. What is a digital recorder?
records digital data
records analog data
does not record data
records both analog and digital data

7. Data acquisition systems are not widely used.
True
False
all of the above
None of the mentioned

8. For lower accuracies ______
digital acquisition system is used
both digital and analog acquisition systems are used
analog acquisition system is used
mechanical data acquisition system is used

9. Digital acquisition systems are used when ____
bandwidth is high
bandwidth is medium
bandwidth is zero
bandwidth is low

10. A single channel data system consists of a signal conditioner, A/D converter and a buffer.
True
False
all of the above
None of the mentioned

11. A/D conversion rate is ____
variable
predefined
zero
constant

12. The buffer output is _____
analog
zero
digital
mixed mode

13. Which is the best example of a single channel data acquisition system?
CPM
BPM
APM
DPM

14. Digital outputs are obtained from _______
A/D converter
D/A converter
Oscilloscope
Voltage source

15. A/D converters can’t be used for low frequency ranges.
True
False
all of the above
None of the mentioned

16. Which technique is most widely used in the single channel data acquisition system?
Counter type approximation
Flash approximation
Successive approximation
Delta Sigma approximation

17. What is pre-amplification?
reducing the magnitude of a signal
making the magnitude of a signal zero
reducing the noise
boosting the signal

18. How can the input be isolated from the system?
using optocouplers
using op-amps
using a capacitor
using rectifiers

19. Multichannel data acquisition system has _______
multiple channels
single channel
two channels
five channels

20. How many types of multiplexed system exist?
2
3
5
10

21. Multichannel Analog Multiplexed System is ______
very fast
fast
slow
moderate

22. Multichannel Analog Multiplexed System utilises time _____
using a transformer
using a capacitor
using a flip-flop
using a mux

23. In a Multichannel Analog Multiplexed System _______
A/D converter is used
D/A converter is used
Sigma delta converter is used
Modulator is used

24. In a Multichannel Analog Multiplexed System, data stored in sample and hold circuit is converted into analog form.
True
False
all of the above
None of the mentioned

25. Many channels can be monitored at the same time by ________
Demultiplexing
A/D conversion
Multiplexing
D/A conversion

26. Multiplexing after A/D conversion involves ________
noisy data
mixed signal data
analog data
digital data

27. Multiplexing after A/D conversion provides immunity to noise.
True
False
all of the above
None of the mentioned

28. What led to the development of PC based transducers?
low cost
medium cost
high cost
zero cost

29. ADD ON card is used for _______
to reduce noise
communication
to boost the magnitude
to measure voltage

30. PC based data acquisition system displays system parameters _______
once in a while
intermittently
continuously
only at specific intervals

31. What are MIMIC displays?
man-material interface
man-made interface
man-machine interface
man-machine interface

32. System parameters are distinguished by physical attributes.
True
False
all of the above
None of the mentioned

33. Personal computer does not contain additional hardware in a PC based data acquisition system.
True
False
all of the above
None of the mentioned

34. Data analysis hardware is used for _______
making the process independent
slowing the process
fastening the process
making the process constant

35. Input signal range in a PC based data acquisition system is _______
0.10 mV to 1 V
1 mV to 100 V
5 mV to 5 V
10 mV to 10 V

36. Amplified input signal is digitised through ____
A/D converters
D/A converters
Rectifiers
Sigma delta modulators

37. What is the main objective of process control?
to control physical parameters
to control mechanical parameters
to control optical parameters
to control electrical parameters

38. What is a process control system?
system to keep the parameters at zero value
system to maintain the parameters constant
system to keep the parameters at highest value
system to check the voltage

39. Physical parameters change due to ______
voltage
current
internal and external disturbances
power

40. A process control system consists of ____
10 elements
6 elements
2 elements
4 elements

41. For proper feedback in a process control element, it is required to ________
measure P
measure set point
measure error
measure comparator

42. Feedback path element measure only input parameters.
True
False
all of the above
None of the mentioned

43. A transducer converts _____
mechanical quantity to electrical form
electrical quantity to physical form
physical quantity to electrical form
chemical quantity to physical form

44. An electrical transducer consists of ________
4 parts
6 parts
8 parts
2 parts

45. A transducer is part of a large circuit and produces the required output.
True
False
all of the above
None of the mentioned

46. How many types of transducers are there?
2
4
6
8

47. Mechanical transducers sense ______
electrical changes
physical changes
chemical changes
biological changes

48. Mechanical transducers generate ________
electrical signals
chemical signals
physical signals
biological signals

49. Electrical transducers generate _______
biological signals
chemical signals
physical signals
electrical signals

50. Electrical signals are easy to amplify.
True
False
all of the above
None of the mentioned