Lakshya Education MCQs

Question: The amount of radiation mainly depends upon the
Options:
A. Nature of the body
B. Temperature of the body
C. Type of surface of the body
D. All of these
Answer: Option D
Explanation :

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More Questions on This Topic :

Question 1. The most commonly used method for the design of duct size is the
  1.     Velocity reduction method
  2.     Equal friction method
  3.     Static regains method
  4.     Dual or double method
Answer: Option C
Explanation :
Question 2. The critical thickness of insulation for a sphere is
  1.     k/h₀
  2.     2k/h₀
  3.     h₀/k
  4.     h₀/2k
Answer: Option B
Explanation :
Question 3. Which of the following is expected to have highest thermal conductivity?
  1.     Steam
  2.     Solid ice
  3.     Melting ice
  4.     Water
Answer: Option B
Explanation :
Question 4. The emissive power of a body depends upon its
  1.     Temperature
  2.     Wave length
  3.     Physical nature
  4.     All of the above
Answer: Option D
Explanation :
Question 5. The amount of radiation mainly depends upon the
  1.     Nature of the body
  2.     Temperature of the body
  3.     Type of surface of the body
  4.     All of these
Answer: Option D
Explanation :
Question 6. Film coefficient is defined as inside diameter of tube
  1.     Equivalent thickness of film
  2.     Thermal conductivity Equivalent thickness of film Specific heat × Viscosity
  3.     Thermal conductivity Molecular diffusivity of momentum Thermal diffusivity
  4.     Film coefficient × Inside diameter Thermal conductivity
Answer: Option B
Explanation :

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