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MCQs

Total Questions : 75 | Page 2 of 8 pages
Question 11. For what purpose we use thermometric well?
  1.    To measure current
  2.    To measure resistance
  3.    To measure temperature of gas
  4.    To stop heat dissipation
 Discuss Question
Answer: Option C. -> To measure temperature of gas
Answer: (c).To measure temperature of gas
Question 12. The relevant boundary conditions in case of heat transfer from a bar connected to two heat sources at different temperatures are
  1.    α = α 1 at x = 0 and α = α 2 at x = infinity
  2.    α = α 1 at x = 1 and α = α 2 at x = 2L
  3.    α = α 1 at x = infinity and α = α 2 at x = 1
  4.    α = α 1 at x = 0 and α = α 2 at x = L
 Discuss Question
Answer: Option D. -> α = α 1 at x = 0 and α = α 2 at x = L
Answer: (d).α = α 1 at x = 0 and α = α 2 at x = L
Question 13. In thermometric well, the error can be minimized by
(i) The value of parameter ml slows down by some quantity.
(ii) Lagging of the tube so that conduction of heat along its length is arrested
Identify the correct option
  1.    True
  2.    False
  3.    May be
  4.    Can't say
 Discuss Question
Answer: Option B. -> False
Answer: (b).False
Question 14. Suppose there are two reservoirs A and B. Let TA and TB be the temperatures of respective reservoirs. At any instant say TA = TB. In this case maximum temperature occurs at
  1.    Middle
  2.    Left
  3.    Right
  4.    All over the rod
 Discuss Question
Answer: Option A. -> Middle
Answer: (a).Middle
Question 15. “The tube that is used in thermometric well is considered as a hollow fin and the temperature distribution is obtained by using the relation applicable to infinitely long fin”. Choose the correct option
  1.    True
  2.    False
  3.    May be
  4.    Can't say
 Discuss Question
Answer: Option B. -> False
Answer: (b).False
Question 16. Which fin yields the maximum heat flow per unit weight?
  1.    Straight triangular fin
  2.    Curved triangular fin
  3.    Parabolic fin
  4.    Hyperbolic fin
 Discuss Question
Answer: Option A. -> Straight triangular fin
Answer: (a).Straight triangular fin
Question 17. “The diameter of well does not have any effect on temperature measurement by the thermometer”. Choose the correct option
  1.    True
  2.    False
  3.    May be
  4.    Can't say
 Discuss Question
Answer: Option A. -> True
Answer: (a).True
Question 18. “If a fin of a constant cross section is used, there would be wastage of material”. Chose the correct option.
  1.    True
  2.    False
  3.    May be
  4.    Can't say
 Discuss Question
Answer: Option A. -> True
Answer: (a).True
Question 19. Which one is true regarding parabolic fin?
  1.    It dissipates the minimum amount of heat at minimum material cost
  2.    It dissipates the minimum amount of heat at maximum material cost
  3.    It dissipates the maximum amount of heat at maximum material cost
  4.    It dissipates the maximum amount of heat at minimum material cost
 Discuss Question
Answer: Option D. -> It dissipates the maximum amount of heat at minimum material cost
Answer: (d).It dissipates the maximum amount of heat at minimum material cost
Question 20. Heat dissipation by every segment of the fin is
  1.    Sometimes same
  2.    Same
  3.    Not same
  4.    Sometimes same or sometimes not same
 Discuss Question
Answer: Option C. -> Not same
Answer: (c).Not same

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