[Oil transportation prizes Q&A] 69

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Multiple choice questions. There are 5 questions every day. If you answer a question correctly, you will get 2 wealth. If you answer all questions correctly, you will be rewarded with 10 wealth. In order to prevent some members from plagiarizing other members' answers, please hide your posts when answering questions. For specific hiding methods, see: http://bbs.hcbbs.com/viewthread.php?tid=492556&highlight=%D2%FE%B2%D8 36. When the temperature difference on both sides of the thermal conductor is 1°C along the direction of heat flow per unit time, the heat conducted through the unit length is called (). (A) Heat release coefficient (B) Thermal conductivity coefficient (c) Convection coefficient (D) Radiation coefficient 37. The heat transfer process from the high temperature part to the low temperature part of the object is the () process. (A) Heat exchange (B) Radiation heat transfer (c) Conductive heat transfer (D) Convective heat transfer 38. ( ) is an index that measures the heat conduction ability of a substance. (A) Thermal conductivity (B) Absorption (c) Transmittance (D) Reflectivity 39. Which of the following substances has the smallest thermal conductivity ( ). (A) Steel (B) Red brick (c) Clear water (D) Air 40. The order of thermal conductivity of the following substances from large to small is ( ). (A) Gas-liquid-metal (B) Liquid-gas-metal (C) Metal-liquid-gas (D) Metal-gas-liquid