Instrumentation Amplifier multiple choice questions
Instrumentation Amplifier
1. The length of the transmission lines are
a) Longer than 10 meters
b) Shorter than 10 meters
c) Equals to 10 meters
d) None of the mentioned
Answer: None of the mentioned
2. Transmission line are used for
a) Output signal
b) Input signal
c) Signal transfer
d) All of the mentioned
Answer: Signal transfer
3. An instrumentation system does not include
a) Transducer
b) Instrumentation amplifier
c) Automatic process controller
d) Tester
Answer: Tester
4. Strain gage is an example of which device?
a) Transducer
b) Voltage follower
c) Integrator
d) Differentiator
Answer: Transducer
5. Why output of transducer is not directly connected to indicator or display?
a) Low level output is produced
b) High level output is produced
c) No output is produced
d) Input is fed directly
Answer: Low level output is produced
6. General purpose op-amps are used in applications as
a) Instrumentation amplifier
b) Differential instrumentation amplifier
c) Inverting instrumentation amplifier
d) Non-inverting instrumentation amplifier
Answer: Differential instrumentation amplifier
7. What is the disadvantage of using LH0036 instrumentation op-amp?
a) Extremely stable
b) Relatively expensive
c) Accurate
d) All of the mentioned
Answer: Relatively expensive
8. In an instrumentation amplifier using transducer bridge, which device measure the change in physical energy
a) Resistive transducer
b) Indicating meter
c) Capacitive transducer
d) Inductor circuit
Answer: Resistive transducer
9. What instrument is used to amplify output signal of transducer
a) Peaking amplifier
b) Instrumentation amplifier
c) Differential amplifier
d) Bridge amplifier
Answer: Instrumentation amplifier
10. What are the features of instrumentation amplifier?
a) Low noise
b) High gain accuracy
c) Low thermal and time drift
d) All of the mentioned
Answer: All of the mentioned
11. Express the equation for transducer bridge, if all the resistor values are equal
a) v=-(△R×Vdc)/(2×R+△R)
b) v=-(△R×Vdc)/2×(R+△R)
c) v=-Vdc/[2×(2×R+△R)].
d) v=-(△R×Vdc)/ [2×(2×R+△R)].
Answer: v=-(△R×Vdc)/ [2×(2×R+△R)].
12. Consider a thermistor having the following specifications: RF=150kΩ at a reference temperature of 35oC and temperature coefficient of resistance = 25oC. Determine the change in resistance at 100oC.
a) -1.625MΩ
b) 9.75MΩ
c) 4.78MΩ
d) None of the mentioned
Answer: -1.625MΩ
13. The temperature of a thermistor increases, when the value of its resistance
a) Remain constant
b) Increase
c) Decrease
d) Depends on the heating material
Answer: Decrease
14. Name the resistive transducer that varies its resistance on application of external stress?
a) Photocells
b) Light dependent
c) Stain gage
d) None of the mentioned
Answer: Stain gage.
15. Photo conductive cell changes it resistance with
a) Change in temperature
b) Material composition
c) Incident radiant energy
d) Change in elasticity
Answer: Incident radiant energy
16. Which material is used for photoconductive cells?
a) Germanium
b) Cadmium sulphide
c) Lithium
d) Phosphorous
Answer: Cadmium sulphide
17. What will be the resistance of a photoconductive cell in darkness?
a) 1000-3000Ω
b) 100MΩ
c) 250-500Ω
d) None of the mentioned
Answer: None of the mentioned
18. Which type of thermistor is chosen for temperature measurement and control?
a) High temperature coefficient of resistance
b) Low temperature coefficient of resistance
c) Positive temperature coefficient of resistance
d) None of the mentioned
Answer: High temperature coefficient of resistance
19. How a differential instrumentation amplifier using transducer bridge can be used as a temperature controller?
a) Increase room temperature
b) Replaces calibrated meter with relay
c) Change the bridge resistance
d) Replace thermistor by light intensity meter
Answer: Replaces calibrated meter with relay.
20. What will be the resultant circuit, when the thermistor in the bridge transducer is replaced by a strain gage?
a) Differential input and differential output amplifier
b) Light intensity
c) Analog weight scale
d) None of the mentioned
Answer: Analog weight scale
21. What is the unit of strain gage?
a) Ω/oC
b) Lux
c) Newton / meter2
d) Volts
Answer: Newton / meter2
22. Strain gage are used to monitor change in
a) Pressure
b) Torque
c) Displacement
d) All of the mentioned
Answer: All of the mentioned.
23. The strain gage elements in the analog weight scale are mounted on a
a) Base of weight platform
b) Hanging weight platform
c) Loading weight platform
d) Varying weight platform
Answer: Base of weight platform
24. Which type of resistive transducer is most commonly used?
a) Thermistor
b) Photoconductive cell
c) Strain gage
d) All of the mentioned
Answer: Thermistor
25. Which type of strain gage has better resolution?
a) Semiconductor strain gage
b) Wire strain gage
c) Wire and Semiconductor strain gage
d) None of the mentioned
Answer: Semiconductor strain gage
a) Longer than 10 meters
b) Shorter than 10 meters
c) Equals to 10 meters
d) None of the mentioned
Answer: None of the mentioned
2. Transmission line are used for
a) Output signal
b) Input signal
c) Signal transfer
d) All of the mentioned
Answer: Signal transfer
3. An instrumentation system does not include
a) Transducer
b) Instrumentation amplifier
c) Automatic process controller
d) Tester
Answer: Tester
4. Strain gage is an example of which device?
a) Transducer
b) Voltage follower
c) Integrator
d) Differentiator
Answer: Transducer
5. Why output of transducer is not directly connected to indicator or display?
a) Low level output is produced
b) High level output is produced
c) No output is produced
d) Input is fed directly
Answer: Low level output is produced
6. General purpose op-amps are used in applications as
a) Instrumentation amplifier
b) Differential instrumentation amplifier
c) Inverting instrumentation amplifier
d) Non-inverting instrumentation amplifier
Answer: Differential instrumentation amplifier
7. What is the disadvantage of using LH0036 instrumentation op-amp?
a) Extremely stable
b) Relatively expensive
c) Accurate
d) All of the mentioned
Answer: Relatively expensive
8. In an instrumentation amplifier using transducer bridge, which device measure the change in physical energy
a) Resistive transducer
b) Indicating meter
c) Capacitive transducer
d) Inductor circuit
Answer: Resistive transducer
9. What instrument is used to amplify output signal of transducer
a) Peaking amplifier
b) Instrumentation amplifier
c) Differential amplifier
d) Bridge amplifier
Answer: Instrumentation amplifier
10. What are the features of instrumentation amplifier?
a) Low noise
b) High gain accuracy
c) Low thermal and time drift
d) All of the mentioned
Answer: All of the mentioned
11. Express the equation for transducer bridge, if all the resistor values are equal
a) v=-(△R×Vdc)/(2×R+△R)
b) v=-(△R×Vdc)/2×(R+△R)
c) v=-Vdc/[2×(2×R+△R)].
d) v=-(△R×Vdc)/ [2×(2×R+△R)].
Answer: v=-(△R×Vdc)/ [2×(2×R+△R)].
12. Consider a thermistor having the following specifications: RF=150kΩ at a reference temperature of 35oC and temperature coefficient of resistance = 25oC. Determine the change in resistance at 100oC.
a) -1.625MΩ
b) 9.75MΩ
c) 4.78MΩ
d) None of the mentioned
Answer: -1.625MΩ
13. The temperature of a thermistor increases, when the value of its resistance
a) Remain constant
b) Increase
c) Decrease
d) Depends on the heating material
Answer: Decrease
14. Name the resistive transducer that varies its resistance on application of external stress?
a) Photocells
b) Light dependent
c) Stain gage
d) None of the mentioned
Answer: Stain gage.
15. Photo conductive cell changes it resistance with
a) Change in temperature
b) Material composition
c) Incident radiant energy
d) Change in elasticity
Answer: Incident radiant energy
16. Which material is used for photoconductive cells?
a) Germanium
b) Cadmium sulphide
c) Lithium
d) Phosphorous
Answer: Cadmium sulphide
17. What will be the resistance of a photoconductive cell in darkness?
a) 1000-3000Ω
b) 100MΩ
c) 250-500Ω
d) None of the mentioned
Answer: None of the mentioned
18. Which type of thermistor is chosen for temperature measurement and control?
a) High temperature coefficient of resistance
b) Low temperature coefficient of resistance
c) Positive temperature coefficient of resistance
d) None of the mentioned
Answer: High temperature coefficient of resistance
19. How a differential instrumentation amplifier using transducer bridge can be used as a temperature controller?
a) Increase room temperature
b) Replaces calibrated meter with relay
c) Change the bridge resistance
d) Replace thermistor by light intensity meter
Answer: Replaces calibrated meter with relay.
20. What will be the resultant circuit, when the thermistor in the bridge transducer is replaced by a strain gage?
a) Differential input and differential output amplifier
b) Light intensity
c) Analog weight scale
d) None of the mentioned
Answer: Analog weight scale
21. What is the unit of strain gage?
a) Ω/oC
b) Lux
c) Newton / meter2
d) Volts
Answer: Newton / meter2
22. Strain gage are used to monitor change in
a) Pressure
b) Torque
c) Displacement
d) All of the mentioned
Answer: All of the mentioned.
23. The strain gage elements in the analog weight scale are mounted on a
a) Base of weight platform
b) Hanging weight platform
c) Loading weight platform
d) Varying weight platform
Answer: Base of weight platform
24. Which type of resistive transducer is most commonly used?
a) Thermistor
b) Photoconductive cell
c) Strain gage
d) All of the mentioned
Answer: Thermistor
25. Which type of strain gage has better resolution?
a) Semiconductor strain gage
b) Wire strain gage
c) Wire and Semiconductor strain gage
d) None of the mentioned
Answer: Semiconductor strain gage
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