This set of Instrumentation Transducers Multiple Choice Questions & Answers (MCQs) focuses on “Feedback Pneumatic Loadcell”.
1. Pneumatic load cells are suitable for measuring ______________
a) Very low pressure
b) Very high pressure
c) Intermediate range of pressure
d) All of the mentioned
View Answer
Explanation: Pneumatic and hydraulic load cells are suitable for measuring very high pressure range.
2. Hydraulic cells are preferable since _______________
a) Can be used up to high pressure
b) Faster indication
c) Used for measuring high weights
d) All of the mentioned
View Answer
Explanation: Hydraulic cells can be used in pressure up to 29 kg/cm2 and high weight up to 5*106kg.
3. Pressure output and area of diaphragm in pneumatic cell is related by ______________
a) Direct proportionality
b) Inverse proportionality
c) Equal
d) No relation
View Answer
Explanation: Output and area of diaphragm is given by
P0 = Fi/(A+(1/KdKn)).
4. Which of the following is correct for load cell?
a) Force to electrical energy conversion
b) Electrical energy to force conversion
c) Force to force conversion
d) None of the mentioned
View Answer
Explanation: Load cells are working based on the conversion of force to an electrical signal.
5. Load cells are highly stable.
a) True
b) False
View Answer
Explanation: Load cell operation is much affected by mechanical factors and also can be damaged by induced current.
6. Which of the following can be used with highly dynamic force?
a) Piezo-electric load cell
b) Strain gauge load cell
c) All of the mentioned
d) None of the mentioned
View Answer
Explanation: Piezo-electric load cell can be used with highly dynamic force.
7. Which of the following is suitable for geomechanical measurement?
a) Vibrating wire load cell
b) Strain gauge load cell
c) Piezo electric load cell
d) All of the mentioned
View Answer
Explanation: They are more suitable due to the low amount of drift.
8. Which of the following may be a cause for ringing in pneumatic load cell?
a) High load
b) Low load
c) Abrupt load change
d) No load
View Answer
Explanation: Ringing is a process formed when abrupt load change occurs.
9. Pressure can be directly measured from load cell.
a) True
b) False
View Answer
Explanation: Pressure is measured using strain gauge or piezo electric material.
10. Which of the following can be measured using a load cell?
a) Displacement
b) Stress
c) Strain
d) All of the mentioned
View Answer
Explanation: Load cell can be used to measure displacement, stress and strain on different arrangements.
Sanfoundry Global Education & Learning Series – Instrumentation Transducers.
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