Instrumentation Transducers

Force Measurement

Question 1
Marks : +2 | -2
Pass Ratio : 25%
Which of the following device can be used for force measurement?
Beams
Bellows
Capsule
Bourdon tube
Explanation:
Beams are used for force measuring applications, all other devices listed are used for measuring pressure.
Question 2
Marks : +2 | -2
Pass Ratio : 25%
Which of the following statement is true for force?
Force is a scalar quantity
Force is a vector quantity
Force is a dimensionless quantity
None of the mentioned
Explanation:
Force can be described as a vector quantity, in which measurement of magnitude and direction of application is important.
Question 3
Marks : +2 | -2
Pass Ratio : 25%
Which of the following conversion is correct for load cell?
Force to strain
Force to displacement
Force to voltage
Both force to strain and force to displacement
Explanation:
Commonly load cell measure applied force using strain gauges, but in some cases, force is measured by detecting displacement, that is a force to displacement conversion.
Question 4
Marks : +2 | -2
Pass Ratio : 25%
Load cells are used for measuring _______________
Large weights only
Small weights only
Weights moving in high speed
Slowly moving weights
Explanation:
Load cells are used for measuring weights of slowly moving bodies so that their weight will be uniformly distributed over load cell surface.
Question 5
Marks : +2 | -2
Pass Ratio : 25%
Which of the following can be measured using a Ring-type load cell?
Large weight
Small weight
Both large and small weights
None of the mentioned
Explanation:
Ring type load cell consists of a ring like an arrangement to which force is applied. They are used for applications in which measurement of small forces are required.
Question 6
Marks : +2 | -2
Pass Ratio : 25%
Which of the following represents correct relationship for strain in ring-type load cell?
(1.08 F R)/(E b t2)
(F R)/(E b t2)
(1.08 R)/(E b t2)
(1.08 F )/(E b t2)
Explanation:
(1.08 F R)/(E b t2) represents strain measured using ring-type load cell, in which F represents force applied, R represents radius of ring, E represents Young’s modulus of material, b represents axial width and t represents thickness of ring.
Question 7
Marks : +2 | -2
Pass Ratio : 25%
Diaphragm element can also be used for force measurement.
True
False
Explanation:
Diaphragm elements act like flat springs in case of force measurement and can be used for measuring both force and pressure.
Question 8
Marks : +2 | -2
Pass Ratio : 25%
Which of the following statement is true for diaphragms?
Used for measuring small forces
Used for measuring large forces
Used for measuring dynamic forces
None of the mentioned
Explanation:
Diaphragm elements, being a small force capacity is used for measuring small forces only.
Question 9
Marks : +2 | -2
Pass Ratio : 25%
Load cells are primary transducers.
True
False
Explanation:
Primary transducers are which converts measurand into mechanical quantities. Load cell converts measurand into strain or displacement which are mechanical quantities and hence load cells are primary transducers.
Question 10
Marks : +2 | -2
Pass Ratio : 25%
Which of the following arrangements are used in load cells?
Tensile strain gauges
Compressive strain gauges
Both tensile and compressive strain gauges
None of the mentioned
Explanation:
Force applied to a load cell is measured using determining tensile and compressive components of strain. Strain gauges are attached to the surface of the load cell.