1. A transducer converts
a. temperature to resistance
b. force into current
c. position into voltage
d. one form of energy to another
AMEM 211 – Dr. Sotiris Omirou
2. Whose of the following transducers the
output is a change in resistance?
a. thermistor
b. resistive thermometer
c. strain gauge
d. all of the above
AMEM 211 – Dr. Sotiris Omirou
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3. Which of the following is an output
transducer?
a. resistive thermometer
b. solenoid
c. strain gauge
d. thermistor
AMEM 211 – Dr. Sotiris Omirou
4. An amplifier is used
a. to display the output signal
b. as a power supply to an instrument
c. to increase the signal from the transducer
d. to filter noise from the input signal
AMEM 211 – Dr. Sotiris Omirou
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5. What device is also known as a sensor
a. output transducer
b. input transducer
c. any transducer
d. none of the above
AMEM 211 – Dr. Sotiris Omirou
6. What type of energy can be converted into an
electrical signal by an input transducer?
a. force
b. pressure
c. heat
d. all of the above
AMEM 211 – Dr. Sotiris Omirou
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7. What type of transducer senses force?
a. strain gauge
b. potentiometer
c. resistive thermometer
d. none of the above
AMEM 211 – Dr. Sotiris Omirou
8. What type of output does a thermistor have?
a. voltage
b. current
c. change in temperature
d. change in resistance
AMEM 211 – Dr. Sotiris Omirou
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9. The transducer in your home thermostat is
an example of a(n)
a. input transducer
b. temperature transducer
c. sensor
d. all of the above
AMEM 211 – Dr. Sotiris Omirou
10. A resistance temperature transducer has a
positive temperature coefficient.
As the temperature rises the
a. applied voltage increases
b. applied voltage decreases
c. resistance increases
d. resistance decreases
AMEM 211 – Dr. Sotiris Omirou
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11. The shots in the figure represent five consecutive
measurements. The measuring system is
a. not accurate or precise
b. precise but not accurate
c. accurate and not precise
d. accurate and precise
AMEM 211 – Dr. Sotiris Omirou
12. A measuring system giving a different value
when the input is increasing than when it is
decreasing presents
a. linearity error
b. hysteresis error
c. percentage error
d. repeatability error
AMEM 211 – Dr. Sotiris Omirou
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13. A signal conditioner is used
a. to modify the signal for the final stage
b. to amplify a weak signal
c. to filter noise from the input signal
d. all of the above
AMEM 211 – Dr. Sotiris Omirou
14. The measurement of performance of
an instrument is known as
a. sensitivity
b. calibration
c. signal conditioning
d. readability
AMEM 211 – Dr. Sotiris Omirou
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15. An instrument with a 30-cm scale
would have
a.
a higher readability than an instrument with a
1515-cm scale and the same range.
b. a lower readability than an instrument with a
1515-cm scale and the same range.
c. the same readability with an instrument with a
1515-cm scale and the same range.
d. the same range with a 1515-cm scale and the same resolution
AMEM 211 – Dr. Sotiris Omirou
16. A voltmeter with a range 0 to 5 Volts has
0.01 V resolution. Which of the following
readings is impossible
a.
b.
c.
4.09 V
d.
3.001 V
0.02 V
1.1
V
AMEM 211 – Dr. Sotiris Omirou
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17. A strain gauge
a. used with a Wheatstone bridge converts a
change in electrical resistance to a change in
voltage
b. converts displacement to a change in
resistance
c. is used to measure the elongation of an
object
d. all of the above
AMEM 211 – Dr. Sotiris Omirou
18. A potentiometer
a. converts rotational movement to linear
movement
b. converts displacement to a change in
voltage
c. converts linear movement to rotational
movement
d. none of the above
AMEM 211 – Dr. Sotiris Omirou
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19. L.V.D.T. stands for
a.
b.
c.
d.
Low Voltage Differential Transformer
Low Voltage Digital Transformer
Linear Virtual Differential Transformer
Linear Variable Differential Transformer
AMEM 211 – Dr. Sotiris Omirou
20. A L.V.D.T.
a. consists of two primary and one
secondary coil
b. is used to measure a change in
resistance
c. is used to measure rotational movement
d. none of the above
AMEM 211 – Dr. Sotiris Omirou
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21. Which of the following is a digital
sensor?
a.
b.
c.
d.
strain gauge
potentiometer
contact switch
L.V.D.T.
AMEM 211 – Dr. Sotiris Omirou
22. Measurement of displacement is the
basis of measuring
a. position
b. stress
c. force
d. all of the above
AMEM 211 – Dr. Sotiris Omirou
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23. Noise is a random variation of the value of
the measured output as a consequence of
a.
b.
c.
d.
environmental influence
a weak signal
a high resistance
all of the above
AMEM 211 – Dr. Sotiris Omirou
24. Which of the following statements is correct?
a. Sensors and transducers are both
examples of actuators
b. Sensors and actuators are both examples
of transducers
c. Actuators and transducers are both
examples of sensors
d. none of the above
AMEM 211 – Dr. Sotiris Omirou
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25. What term describes the maximum expected
error associated with a measurement or a
sensor?
a. Resolution
b. Range
c. Accuracy
d. precision
AMEM 211 – Dr. Sotiris Omirou
26. Which of the following forms of temperature
sensor produces a large change in its resistance
with temperature, but is very non-linear?
a. Platinum resistance thermometer
b. Thermistor
c. Thermocouple
d. RTD
AMEM 211 – Dr. Sotiris Omirou
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27. The image below shows a strain gauge. With the
device oriented as shown, what is the direction of
sensitivity of the device?
a. Horizontal
b. Perpendicular to the plane of the device
c. Vertical
AMEM 211 – Dr. Sotiris Omirou
28. A thermal sensor that produces a voltage in
proportion to the temperature is called:
a. Resistive Temperature Device or RTD
b. Thermistor
c. Thermocouple
d. Both (a) and (b)
AMEM 211 – Dr. Sotiris Omirou
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