Chapter:

40+ Introduction Solved MCQs

in Sensors and Transducers

These multiple-choice questions (MCQs) are designed to enhance your knowledge and understanding in the following areas: Electrical Engineering .

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1.	Strain gauge is an example of _ _ _ _ _ sensors
A.	Modulating sensor
B.	Direct sensor
C.	Self generating sensors
D.	None of the above
Answer» A. Modulating sensor

discuss

2.	Sensor is a type of transducer.
A.	True
B.	False
C.	none
D.	none
Answer» A. True

discuss

3.	Based upon what parameters sensors will be chosen_ _ _ _ _
A.	Environmental factors
B.	Economic factor
C.	Static characteristics
D.	All the above
Answer» D. All the above

discuss

4.	_ _ _ _ _ _can be defined as the variation in the constant of proportionality between the input physical quantity and the output electrical signal
A.	Resolution
B.	Accuracy
C.	Precision
D.	Linearity
Answer» D. Linearity

discuss

5.	Average value of the readings is _ _ _ _ _
A.	Mean
B.	Median
C.	Mode
D.	deviation
Answer» A. Mean

discuss

6.	Change in output of sensor with change in input is
A.	Threashold
B.	Slew rate
C.	Sensitivity
D.	None of the mentioned
Answer» C. Sensitivity

discuss

7.	Smallest change which a sensor can detect is ____________
A.	Resolution
B.	Accuracy
C.	Precision
D.	Scale
Answer» A. Resolution

discuss

8.	Which of the following error is caused by a reversal of measured property?
A.	Hysterisis
B.	Noise
C.	Digitization error
D.	Quantization error
Answer» A. Hysterisis

discuss

9.	___________, describing the performance with respect to very slow changes.
A.	Static characteristics
B.	Dynamic characteristics
C.	Environmental characteristics
D.	Reliability Characteristics
Answer» A. Static characteristics

discuss

10.	Unpredictable error _ _ _ _ __
A.	Random error
B.	Gross error
C.	Systematic error
D.	Precision error
Answer» A. Random error

discuss

11.	What is the term used to express the ability of a measuring system to maintain its standard performance?
A.	Zero stability
B.	Stability
C.	Sensitivity
D.	Linearity
Answer» B. Stability

discuss

12.	_ _ _ _ _ _ is also used to indicate the most probable value of the measured quantity when a set of readings are taken.
A.	Mean
B.	Median
C.	Mode
D.	deviation
Answer» B. Median

discuss

13.	A system will be error free if we remove all systematic error’.
A.	True
B.	False
C.	none
D.	none
Answer» B. False

discuss

14.	Thermocouple is an example of _ _ _ _ _ _ sensor
A.	Modulating sensor
B.	Direct sensor
C.	Interrogating sensors
D.	None of the above
Answer» B. Direct sensor

discuss

15.	Which of the following error is caused by poor calibration of the instrument?
A.	Random error
B.	Gross error
C.	Systematic error
D.	Precision error
Answer» C. Systematic error

discuss

16.	_ _ _ _ _ _ is a popular technique for transmitting digital data in embedded systems.
A.	Analog voltage
B.	PWM
C.	Serial digital
D.	All the above
Answer» B. PWM

discuss

17.	How systematic errors are eliminated?
A.	Frequent measurement
B.	Replacement of instrument
C.	Finding mean of reading
D.	Finding variance of reading
Answer» B. Replacement of instrument

discuss

18.	‘Zero error is an indication of instrumental error’.
A.	True
B.	False
C.	none
D.	none
Answer» A. True

discuss

19.	Which transducer is known as ‘self-generating transducer’?
A.	Active transducer
B.	Passive transducer
C.	Secondary transducer
D.	Analog transducer
Answer» A. Active transducer

discuss

20.	Sensors that use an additional energy source for their operation are called _ _ _ _ _
A.	modulating sensors
B.	Interrogating sensors
C.	Direct sensors
D.	Both a) and b)
Answer» D. Both a) and b)

discuss

21.	_ _ _ _ _ _can be defined as the tolerance within which a measurement can be repeated
A.	Resolution
B.	Accuracy
C.	Precision
D.	Scale
Answer» C. Precision

discuss

22.	Why do we need to calibrate sensors?
A.	Environmental factors
B.	Aging of the components
C.	Cost
D.	All the above
Answer» A. Environmental factors

discuss

23.	_ _ _ _ _ _ is the departure of a given reading from the arithmetic mean of a group of readings.
A.	Mean
B.	Median
C.	Mode
D.	deviation
Answer» D. deviation

discuss

24.	_ _ _ _ __ _, describing the sensor’s life expectancy
A.	Static characteristics
B.	Dynamic characteristics
C.	Environmental characteristics
D.	Reliability Characteristics
Answer» D. Reliability Characteristics

discuss

25.	Sensors Output signal types
A.	Analog voltage
B.	PWM
C.	Serial digital
D.	All the above
Answer» D. All the above

discuss

26.	In a measuring system quantity under measurement is termed as ________________
A.	Measurand
B.	Controllers
C.	Sensors
D.	Indicators
Answer» A. Measurand

discuss

27.	_ _ _ _ _ is the complicated output signal types
A.	Analog voltage
B.	PWM
C.	Serial digital
D.	All the above
Answer» C. Serial digital

discuss

28.	Which of the following is not a characteristic of an ideal transducer?
A.	High dynamic range
B.	Low linearity
C.	High repeatability
D.	Low noise
Answer» B. Low linearity

discuss

29.	_ _ _ _ _ _ _ signals are much more susceptible to noise
A.	Analog signal
B.	Digital signal
C.	Both Analog and Digital signal
D.	None of the above
Answer» A. Analog signal

discuss

30.	_ _ _ _ _ _ is the closeness to true value
A.	Zero stability
B.	Accuracy
C.	Sensitivity
D.	Linearity
Answer» B. Accuracy

discuss

31.	The simplest model for a measurement system is a _ _ _ _ order differential equation
A.	Zero
B.	First
C.	Second
D.	Third
Answer» A. Zero

discuss

32.	Probable error is due to _ _ _ _ _ _.
A.	Systematic error
B.	Gross error
C.	Random error
D.	None of the mentioned
Answer» C. Random error

discuss

33.	_ _ _ _ _ is the value which occurs most frequently in a set of observations and around which other items of the set cluster densely
A.	Mean
B.	Median
C.	Mode
D.	Variance
Answer» C. Mode

discuss

34.	_ _ _ _ _ __ parameters on which sensor classified?
A.	Material and technology
B.	Application
C.	Property and input quantity
D.	All the above
Answer» D. All the above

discuss

35.	In a measuring system what is the term used to specify a difference between higher and lower calibration values?
A.	Range
B.	Span
C.	Drift
D.	Threshold
Answer» B. Span

discuss

36.	Which of the following represent active transducer?
A.	Strain gauge
B.	Thermistor
C.	LVDT
D.	Thermocouple
Answer» D. Thermocouple

discuss

37.	Capacitive transducer is used for?
A.	Static measurement
B.	Dynamic measurement
C.	Transient measurement
D.	Both static and dynamic
Answer» B. Dynamic measurement

discuss

38.	The mercury in glass thermometer is an example of a _ _ _ _ _ _ order instrument
A.	Zero
B.	First
C.	Second
D.	Third
Answer» B. First

discuss

39.	_ _ __ _Senses the physical changes occur in the surrounding and converting it into a readable quantity.
A.	Transducer
B.	Actuator
C.	Relay
D.	Sensor
Answer» D. Sensor

discuss

40.	A _ _ _ _ means that the sensor output is higher or lower than the ideal output.
A.	Offset
B.	Sensitivity
C.	Linearity
D.	Resolution
Answer» A. Offset

discuss

41.	The _ _ _ _ _characteristics of a transducer refer to the performance of the transducer when it is subjected to time varying signal.
A.	Static
B.	Dynamic
C.	Transient
D.	Both a) and b)
Answer» B. Dynamic

discuss

42.	A common example of a _ _ _ _ _ _ _ is to calibrate a temperature sensor using an ice-water bath and boiling water for the two references.
A.	One point calibration
B.	Two point calibration
C.	Three point calibration
D.	Both a) and b)
Answer» B. Two point calibration

discuss

43.	___________, relating the sensor performance after or during exposure to specified external conditions (e.g. pressure, temperature, vibration and radiation).
A.	Static characteristics
B.	Dynamic characteristics
C.	Environmental characteristics
D.	Reliability Characteristics
Answer» C. Environmental characteristics

discuss

44.	A _ _ _ _ __ much more immune to noise than an analog signal
A.	Analog voltage
B.	PWM
C.	Serial digital
D.	All the above
Answer» B. PWM

discuss

45.	Sensor and signal conditioning jointly referred as __ _ __
A.	Transducer
B.	Actuator
C.	Relay
D.	All the above
Answer» A. Transducer

discuss

46.	The most common techniques for noise reduction are differential signal transmission and passive low pass _ _ _ _
A.	Filtration
B.	Amplifier
C.	Relay
D.	All the above
Answer» A. Filtration

discuss

47.	Which of the following is caused by careless handling?
A.	Systematic error
B.	Gross error
C.	Random error
D.	None of the mentioned
Answer» B. Gross error

discuss

40+ Introduction Solved MCQs

Strain gauge is an example of _ _ _ _ _ sensors

Sensor is a type of transducer.

Based upon what parameters sensors will be chosen_ _ _ _ _

_ _ _ _ _ _can be defined as the variation in the constant of proportionality between the input physical quantity and the output electrical signal

Average value of the readings is _ _ _ _ _

Change in output of sensor with change in input is

Smallest change which a sensor can detect is ____________

Which of the following error is caused by a reversal of measured property?

___________, describing the performance with respect to very slow changes.

Unpredictable error _ _ _ _ __

What is the term used to express the ability of a measuring system to maintain its standard performance?

_ _ _ _ _ _ is also used to indicate the most probable value of the measured quantity when a set of readings are taken.

A system will be error free if we remove all systematic error’.

Thermocouple is an example of _ _ _ _ _ _ sensor

Which of the following error is caused by poor calibration of the instrument?

_ _ _ _ _ _ is a popular technique for transmitting digital data in embedded systems.

How systematic errors are eliminated?

‘Zero error is an indication of instrumental error’.

Which transducer is known as ‘self-generating transducer’?

Sensors that use an additional energy source for their operation are called _ _ _ _ _

_ _ _ _ _ _can be defined as the tolerance within which a measurement can be repeated

Why do we need to calibrate sensors?

_ _ _ _ _ _ is the departure of a given reading from the arithmetic mean of a group of readings.

_ _ _ _ __ _, describing the sensor’s life expectancy

Sensors Output signal types

In a measuring system quantity under measurement is termed as ________________

_ _ _ _ _ is the complicated output signal types

Which of the following is not a characteristic of an ideal transducer?

_ _ _ _ _ _ _ signals are much more susceptible to noise

_ _ _ _ _ _ is the closeness to true value

The simplest model for a measurement system is a _ _ _ _ order differential equation

Probable error is due to _ _ _ _ _ _.

_ _ _ _ _ is the value which occurs most frequently in a set of observations and around which other items of the set cluster densely

_ _ _ _ _ __ parameters on which sensor classified?

In a measuring system what is the term used to specify a difference between higher and lower calibration values?

Which of the following represent active transducer?

Capacitive transducer is used for?

The mercury in glass thermometer is an example of a _ _ _ _ _ _ order instrument

_ _ __ _Senses the physical changes occur in the surrounding and converting it into a readable quantity.

A _ _ _ _ means that the sensor output is higher or lower than the ideal output.

The _ _ _ _ _characteristics of a transducer refer to the performance of the transducer when it is subjected to time varying signal.

A common example of a _ _ _ _ _ _ _ is to calibrate a temperature sensor using an ice-water bath and boiling water for the two references.

___________, relating the sensor performance after or during exposure to specified external conditions (e.g. pressure, temperature, vibration and radiation).

A _ _ _ _ __ much more immune to noise than an analog signal

Sensor and signal conditioning jointly referred as __ _ __

The most common techniques for noise reduction are differential signal transmission and passive low pass _ _ _ _

Which of the following is caused by careless handling?