Question 1

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

Accepted Answer

A strain gauge is a modulating sensor because it modulates an electrical signal in response to mechanical deformation.

Question 2

Sensor is a type of transducer.

Accepted Answer

A sensor is a type of transducer because it converts one form of energy (e.g., heat, light, sound) into another form, typically an electrical signal.

Question 3

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

Accepted Answer

Sensors are chosen based on a variety of parameters including environmental factors (such as temperature, humidity, and pressure conditions in which the sensor must operate), economic factors (cost considerations for the sensor itself and its maintenance), and static characteristics (accuracy, sensitivity, resolution, etc.). Therefore, all the mentioned factors are important in the selection process.

Question 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

Accepted Answer

Linearity refers to the variation in the constant of proportionality between the input physical quantity and the output electrical signal, indicating how a system's output signal changes in response to changes in the input signal.

Question 5

Average value of the readings is _ _ _ _ _
A)Mean
B)Median
C)Mode
D)deviation

Accepted Answer

The average value of a set of readings is calculated by summing all the readings and then dividing by the total number of readings, which is the definition of the mean.

Question 6

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

Accepted Answer

Sensitivity is the measure of the change in output of a sensor with respect to a change in input, indicating how much the sensor's output changes when the measured quantity changes.

Question 7

Smallest change which a sensor can detect is ____________
A)Resolution
B)Accuracy
C)Precision
D)Scale

Accepted Answer

Resolution is the smallest change or difference in the measured variable that a sensor can detect.

Question 8

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

Accepted Answer

Hysteresis is the error caused by a reversal of the measured property, where the output of a system depends not only on its current input but also on its history of past inputs. This can lead to a lag or delay in the response of the system to changes in the measured property.

Question 9

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

Accepted Answer

Static characteristics are used to describe the performance of systems, sensors, or devices with respect to slow or no changes in conditions or inputs, focusing on aspects like accuracy, precision, and stability under steady-state conditions. Dynamic characteristics, on the other hand, describe performance under changing conditions.

Question 10

Unpredictable error _ _ _ _ __
A)Random error
B)Gross error
C)Systematic error
D)Precision error

Accepted Answer

Unpredictable errors are referred to as random errors because they vary in an unpredictable manner from one measurement to another. They are caused by unknown and unpredictable changes in the experiment.

Question 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

Accepted Answer

Stability refers to the ability of a measuring system to maintain its performance over time, ensuring that the measurements remain consistent and accurate without drifting or varying significantly.

Question 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

Accepted Answer

The answer of _ _ _ _ _ _ is...

Question 13

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

Accepted Answer

Removing all systematic errors does not guarantee a system will be error-free because random errors and other types of uncertainties can still affect the system's accuracy and reliability.

Question 14

Thermocouple is an example of _ _ _ _ _ _ sensor
A)Modulating sensor
B)Direct sensor
C)Interrogating sensors
D)None of the above

Accepted Answer

Thermocouples are direct sensors because they directly measure temperature by producing a voltage that can be correlated to temperature without the need for external interrogation or modulation.

Question 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

Accepted Answer

Systematic error is caused by consistent inaccuracies in measurement, often due to poor calibration of the instrument.

Question 16

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

Accepted Answer

PWM (Pulse Width Modulation) is a popular technique for transmitting digital data in embedded systems because it allows for efficient use of bandwidth and power.

Question 17

How systematic errors are eliminated?
A)Frequent measurement
B)Replacement of instrument
C)Finding mean of reading
D)Finding variance of reading

Accepted Answer

Systematic errors are consistent inaccuracies that occur due to flaws in the measurement system itself, such as errors in the instrument or the experimental setup. They can often be eliminated or reduced by replacing or recalibrating the faulty instrument. Frequent measurements, finding the mean, or calculating the variance address random errors rather than systematic ones.

Question 18

'Zero error is an indication of instrumental error'.

Accepted Answer

Zero error occurs when an instrument does not read zero when the quantity being measured is at zero, indicating a fault or calibration issue with the instrument itself.

Question 19

Which transducer is known as 'self-generating transducer'?
A)Active transducer
B)Passive transducer
C)Secondary transducer
D)Analog transducer

Accepted Answer

Active transducers are known as 'self-generating transducers' because they can generate an output signal in response to a physical phenomenon (like temperature, pressure, etc.) without needing an external power source.

Question 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)

Accepted Answer

Sensors that require an external power source for their operation are known as active sensors. Both modulating and interrogating sensors fall under this category, as they modulate or interrogate the measurement with an external energy source.

Quiz 1: Understanding Sensors and Transducers: Parameters, Calibration, and Performance

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 _ _ _ _ _