Strain Gauge MCQs with Answers

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Strain Gauge MCQs with Answers: Following Multiple Choice Questions (MCQs) are based on “Strain Gauge”. It is related with subject Instrumentation or Industrial Measurement and Applications.

This topic is mostly beneficial in the field of Instrumentation,  Electronics, Electrical and Mechanical Engineering.

These MCQs will be useful in various competitive examinations, entrance examinations, oral examination (Viva voce), certifications and interviews.

MCQ on Strain Gauges

Que.1 Strain gauge is a
  1. Passive device and converts electrical displacement into a change of resistance
  2. Active device and converts electrical displacement into a change of resistance
  3. Active device and converts mechanical displacement into a change of resistance
  4. Passive device and converts mechanical displacement into a change of resistance

✔ View Answer

Option 4: Passive device and converts mechanical displacement into a change of resistance

Que.2 Strain gauges can be used to measure
  1. Tension
  2. Compression
  3. Both of these
  4. None of these

✔ View Answer

Option 3: Both of these

Que.3 The ___________ of a strain gauge varies with applied strain.
  1. resistance
  2. capacitance
  3. inductance
  4. flux

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Option 1: resistance

Que.4 Bonding element in a strain gauge must have __________
  1. zero insulation resistance
  2. low insulation resistance
  3. high insulation resistance
  4. infinite insulation resistance

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Option 3: high insulation resistance

Que.5 Identify the type of strain gauge shown in following figure.
MCQ on Strain Gauges
  1. Uniaxial
  2. Biaxial Rosettes
  3. Three-Element Rosettes
  4. Shear Patterns

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Option 3: Three-Element Rosettes

Que.6 Compressive strain causes strain gauge resistance to
  1. Increase.
  2. decrease.
  3. remain constant.
  4. nullify.

✔ View Answer

Option 2: decrease.

Explanation: In strain gauge, on applying a force there is a change in resistance takes place.
Tension causes resistance increase.
Compression causes resistance decrease.

Que.7 ________ is used to detect very small changes in resistance of strain gauges.
  1. Maxwell’s bridge
  2. Wheatstone bridge
  3. Anderson bridge
  4. Schering Bridge

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Option 2: Wheatstone bridge

Que.8 Which of the following is/are application of Strain gauge?
  1. In load cells for weighbridges.
  2. For monitoring structures such as bridges and buildings.
  3. In research and development applications, including automotive, aerospace etc.
  4. All of the above.

✔ View Answer

Option 4: All of the above.

Explanation:

Que.9 If
ΔR is the change in resistance caused by strain
RG is the resistance of the undeformed gauge
ε is strain
Identify the correct formula for gauge factor,
  1. ΔR * RG * ε
  2. (ΔR/RG) ε
  3. (ΔR + RG)/ ε
  4. (ΔR/RG)/ ε

✔ View Answer

Option 4: (ΔR/RG)/ ε

Que.10 Strain gague is an active transducer.
  1. True
  2. False

✔ View Answer

Option 2: False

Explanation:
Strain gauge is connected in Wheatstone bridge. It requires power for operation therefore it is a passive transducer.

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