This set of Instrumentation Transducers Multiple Choice Questions & Answers (MCQs) focuses on “Beam Balance Systems”.
1. Beam balance is used for _________________
a) Weight comparison
b) Pressure comparison
c) Density comparison
d) None of the mentioned
View Answer
Explanation: Beam balance system is used for comparing two difference weights.
2. In electromagnetic balance system, horizontality is detected by ____________
a) Photo electric cell
b) Direct vision
c) Galvanometer
d) Detector circuit
View Answer
Explanation: Photo electric cell is used for detecting horizontality in beam balance system.
3. Which of the following application in the balance system a PMMC device used for?
a) Restoring balance system
b) Oscillatory action
c) Detection of horizontality
d) None of the mentioned
View Answer
Explanation: PMMC device is incorporated for restoring action.
4. Null position is attained when _______________
a) Two weight becomes equal
b) One becomes double of other
c) One becomes zero
d) No null position attained
View Answer
Explanation: When two weights become equal and bar becomes horizontal it is said to be in the null position.
5. In balance system gain of amplifier is _____________
a) Very low
b) Very high
c) Unity
d) Selected according to weight
View Answer
Explanation: Very high gain amplifier is used so that moments are balanced.
6. Torque of PMMC device is proportional to _______________
a) Mass
b) Change in two masses
c) Balancing time
d) None of the mentioned
View Answer
Explanation: Change in two masses will be proportional to the torque produced by PMMC device.
7. Null detection can be accomplished by ______________
a) Photo cell
b) Direct measurement
c) Pneumatic cell
d) All of the mentioned
View Answer
Explanation: Null detection can be made by use of photocell, Pneumatic cell and direct measurement.
8. PMMC system always tend to make the system distract from null position.
a) True
b) False
View Answer
Explanation: PMMC device is used for beam to restore null position.
9. In a pneumatic balance system, restoring is done by ______________
a) PMMC device
b) Bellows
c) Amplifier
d) Demodulator
View Answer
Explanation: Bellow elements are introduced for providing restoring action in the pneumatic balance system.
10. In a pneumatic balance system, developed output will be __________
a) Pressure variation
b) Current signal
c) Potential difference
d) None of the mentioned
View Answer
Explanation: In a pneumatic balance system, develop output signal will be pressure variation.
Sanfoundry Global Education & Learning Series – Instrumentation Transducers.
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