Thermal Conductivity Measurement MCQs with Answers

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Thermal Conductivity Measurement MCQs and Answers: Following  are  “MCQ on Measurement of Thermal Conductivity“. It is a part of subject Industrial Measurement and Industrial Applications. Generally useful to Electronics, Electrical and Mechanical Engineers. These MCQs will be useful in viva,  interview, various competitive examinations entrance examinations .

MCQ on Measurement of Thermal Conductivity

Que.1 ________ is the ability of a given material to conduct/transfer heat.
  1. Thermal conductivity
  2. Dielectric Heating
  3. Latent Heat
  4. None of the above

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Option 1: Thermal conductivity

Que.2 Thermal conductivity is the rate of heat transfer
  1. Per unit area per unit thickness
  2. Per unit area per unit temperature difference and per unit wall thickness
  3. Per unit area per unit temperature difference
  4. None of the above

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Option 2: Per unit area per unit temperature difference and per unit wall thickness

Que.3 Thermal conductivity is generally denoted by
  1. j
  2. k
  3. l
  4. m

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Option 2: k

Explanation: Thermal conductivity is generally denoted by the symbol ‘k’ but can also be denoted by ‘λ’ and ‘κ’.

Que.4 The dimension/s of thermal conductivity can be expressed in
  1. Temperature
  2. Length
  3. Mass
  4. All of the above

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Option 4: All of the above

Explanation: Thermal conductivity is expressed in terms of the following dimensions: Temperature, Length, Mass, and Time.

Que.5 Basic techniques for measuring thermal conductivity
  1. Steady‐state methods
  2. Transient or non‐steady‐state methods
  3. Both (1) and (2)
  4. None of the above

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Option 3: Both (1) and (2)

Que.6 Steady state heat conduction takes place in
  1. Solids only
  2. Viscous liquid only
  3. Liquids only
  4. Gases only

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Option 1: Solids only.

Que.7 In Transient Techniques, the measurements are taken during the heating-up process.
  1. True
  2. False

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Option 1: True

Que.8 Transient heat conduction depends upon
  1. Temperature & time
  2. Time, temperature & space
  3. Time and space
  4. None

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Option 3: Time and space

Que.9 Which of the following is/are steady state method/s of thermal conductivity?
i.  Hot‐wire method (THW)
ii. Guarded hot plate (GHP) method
  1. Only (i)
  2. Both (i) and (ii)
  3. Only (ii)
  4. None of the above

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Option 3: Only (ii)

Que.10 Which of the following is time consuming method used for measurement of thermal conductivity?
  1. Hot‐wire method (THW)
  2. Guarded hot plate method (GHP)
  3. Laser flash method
  4. Hot‐strip technique

✔ View Answer

Option 2: Guarded hot plate method (GHP)

Que.11 Identify the steady state method used for measurement of thermal conductivity.
  1. Hot‐wire method (THW)
  2. Guarded heat flow meter method
  3. Laser flash method
  4. Hot‐strip technique

✔ View Answer

Option 2: Guarded heat flow meter method

Explanation:
Among transient methods, the hot‐wire and the laser flash methods are commonly used for measuring the thermal conductivity of different materials.
A modification of the hot‐wire method is the hot‐strip or disk technique, which can be applied to solid non electrically conducting materials in order to measure the thermal diffusivity and conductivity

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