One Question per Day on Synthetic Ammonia (Series 24)
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This post was last edited by penghh1985 on 2016-2-29 08:42. Multiple-choice question (fill in the correct option in the brackets). Continuing from Series 23: 116. (B-B-006) The basic equation for heat conduction is ( ). (A) Fourier’s law (B) Bohr’s law (C) Clapeyron equation (D) Planck’s law 117. (B-B-006) The thermal conductivity of syngas increases as the temperature rises ( ). (A) Increase (B) Decrease (C) Remain unchanged (D) Decrease or remain unchanged 118. (B-B-006) The unit of thermal conductivity is ( ). (A) W/m℃ (B) W/mk (C) A and B (D) W/mkt119. (B-B-007) The safety factor for heat exchangers should be increased by approximately ( ). (A) 50% (B) 100% (C) 20% (D) 75% 120. (B-B-007) The difference in heat transfer efficiency between a heat exchanger with and without an fouling layer is ( ). (A) 30%–40% (B) 20%–30% (C) 50%–80% (D) 10%–20% Answer: AACC. Scoring criteria: 3 points for participation, 8 points for a completely correct answer.
Answer: A A C C A
116. (B-B-006) The basic equation for heat conduction is ( A ). (A) Fourier’s law (B) Bohr’s law (C) Clapeyron equation (D) Planck’s law 117. (B-B-006) The thermal conductivity increases as the temperature rises (A). (A) Increase (B) Decrease (C) Remain unchanged (D) Decrease or remain unchanged 118. (B-B-006) The unit of thermal conductivity is (C). (A) W/m℃ (B) W/mk (C) Both A and B (D) W/mkt119. (B-B-007) The safety factor for heat exchangers should be increased by approximately (C). (A) 50% (B) 100% (C) 20% (D) 75% 120. (B-B-007) The difference in heat transfer efficiency between a heat exchanger with and without an fouling layer is (A). (A) 30%–40% (B) 20%–30% (C) 50%–80% (D) 10%–20%
The basic equation for heat conduction is (a). (A) Fourier’s law
The heat transfer efficiency of a heat exchanger with and without an fouling layer differs by ( ). (A) 30%–40%
The safety factor for the heat exchanger should be increased by about (c). (C) 20%
ACACB:lol:lol:lol