1. What is the average value of a distance observation set taken by a ultrasonic sensor?
Observations={5,5.413,5.41,4.97}
a) 5.0325
b) 5.198
c) 5.125
d) 5.07325
Explanation: Given: Observation set={5,5.413,5.41,4.97}
Mean=Sum of observations/Total number of observations
Mean=(5+5.413+5.41+4.97)/4
Mean=5.198
2. Static characteristics are related to the steady state response of an instrument.
a) True
b) False
Explanation: Static characteristics are related to the steady state response of an instrument. Steady state response of sensor is the relationship between input and output when the output changes very slowly or remains constant after a span of time. And static characteristics are the characteristics that changes very slowly or remains constant.
3. What is the mean value of a distance observation set taken by a distance measurement sensor?
Observations={3,3.213,3.11,2.97}
a) 3.0325
b) 3.2
c) 3.125
d) 3.07325
Explanation: Given: Observation set={3,3.213,3.11,2.97}
Mean=Sum of observations/Total number of observations
Mean=(3+3.213+3.11+2.97)/4
Mean=3.07325
4. What is the relative accuracy ratio of an observation taken by a distance measuring sensor which predicts the distance of an object to be 6.16cm but the actual distance is 6.03cm?
a) 13:719
b) 13:603
c) 17:719
d) 13:619
Explanation: Given: Actual Value=6.03 cm
Measured Value=6.16 cm
Absolute error=Measured Value-Actual Value
Absolute error=6.16cm-6.03cm=>0.13cm
Relative accuracy=(Absolute error/Actual distance)
Relative accuracy=(0.13/6.03)=>13:603
5. What is the relative error percentage of an observation taken by an infrared sensor which predicts the distance of an object to be 3.32cm but the actual value is 3.1cm?
a) 12%
b) 7.09%
c) 6%
d) 1%
Explanation: Given: Actual Value=3.1cm
Measured Value=3.32cm
Absolute error=Measured Value-Actual Value
Absolute error=3.32cm-3.1cm=>0.22cm
Relative error=(Absolute error/Actual Value)*100
Relative error=7.09%
6. Which error is also termed as measurement error?
a) Static errors
b) Dynamic errors
c) Systematic errors
d) Statical error
Explanation: Dynamic error is also termed as measurement error under specified conditions. Dynamic error is defined as the difference between the actual or true value with a quantity that changes with time.
7. In retardation type measuring lag the instrument responds after an unspecified dead time lag.
a) True
b) False
Explanation: In retardation type measuring lag the instrument does not responds after an unspecified dead time lag. The instruments respond immediately as soon as a change in measured quantity is encountered.
8. Active transducers do not require power source for operation.
a) True
b) False
Explanation: Active transducers do not require power source for operation. These types of transducers convert one form of energy to another without any external power source. Example:- Photovoltaic cells present in solar panels.
9. Which among the following transducer is an example of active transducer?
a) LDR (Light dependant sensor)
b) Strain gauge
c) Hall effect sensor
d) Photovoltaic cell
Explanation: Photovoltaic cell is an example of active transducer. Active transducers are those types of transducers that convert one form of energy to another without any external power source. Photovoltaic cells are present in solar panels that generates electricity from sunlight.
10. Which among the following transducer is an example of passive transducer?
a) Chemical transducer
b) Thermoelectric transducer
c) Strain gauge
d) Piezoelectric transducer
Explanation: Strain gauge is an example of passive transducer. Passive transducers are those types of transducers that bring change in passive electrical quantity usually with the help of external power source. Strain gauge is a device that changes its resistance when there is change in applied pressure.