This set of Instrumentation Transducers Multiple Choice Questions & Answers (MCQs) focuses on “Application of Feedback”.
1. Which of the following represent the temperature at which atmosphere moisture can saturate?
a) Bubble point
b) Dew point
c) Melting point
d) Saturation point
View Answer
Explanation: Dew point is the temperature at which atmosphere moisture can saturate air.
2. CRO can be considered as an inverse transducer.
a) True
b) False
View Answer
Explanation: In non-contact position measurement CRO can be used and they can consider as an inverse transducer.
3. Closed-loop system are also known as manual control system.
a) True
b) False
View Answer
Explanation: Open-loop systems are known as a manual control system since automatic loop control is not possible.
4. Which of the following lead to instability?
a) Negative feedback
b) Positive feedback
c) Both positive and negative feedback
d) None of the mentioned
View Answer
Explanation: Due to oscillation, chaotic behavior and exponential growth positive feedback cause instability.
5. Which of the following is the application of a positive feedback system?
a) Telemetry system
b) Automatic test system
c) Bimorph position control system
d) None of the mentioned
View Answer
Explanation: Systems such as telemetry system, automatic test system and bimorph position control system are application of negative feedback system.
6. Which of the following is the application of a negative feedback system?
a) Mercury thermostat
b) Centrifugal governor
c) Audio amplifier
d) All of the mentioned
View Answer
Explanation: Mercury thermostat, centrifugal governor and audio amplifier are negative feedback systems.
7. For a good control system bandwidth should be ____________
a) Very low
b) Ideally zero
c) Very high
d) None of the mentioned
View Answer
Explanation: An operating frequency range decides bandwidth of a system and for a good control system, bandwidth should be very high.
8. Time taken by a system to achieve stable state is ______________
a) Oscillation
b) Damping
c) Speed
d) Bandwidth
View Answer
Explanation: Speed is the time taken by the system to achieve a stable state.
9. Electric hand drier is an example of _____________
a) Open loop control system
b) Closed loop control system
c) Unpredictable
d) None of the mentioned
View Answer
Explanation: Electric hand drier is an open loop system in which hot air is supplied as long as the system is active.
10. Automatic washing machine is ________________
a) Open loop control system
b) Closed loop control system
c) Unpredictable
d) None of the mentioned
View Answer
Explanation: Automatic washing machine works based on pre-set time and irrespective of whether washing completed or not.
Sanfoundry Global Education & Learning Series – Instrumentation Transducers.
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