Methanol One question per day Heat exchangers 2016.02.23
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Due to the many tasks I have recently, it’s difficult to guarantee a fixed schedule; even delivering one question per day isn’t certain. Please understand. Those who are interested are welcome to become moderators for the methanol section – one question per day on methanol and heat exchangers. 2016.02.23: 1. When there is a temperature difference inside an object or between two objects in direct contact, the mode of heat transfer by which energy is transferred from the hotter part to the cooler part due to molecular vibration is (A). (A) Conduction (B) Convection (C) Radiation (D) Diffusion 2. Radiation is a method of transferring thermal energy through (C). (A) Collisions between adjacent molecules (B) Relative displacement and mixing of particles (C) Electromagnetic waves (D) Free movement of molecules. 3. The highest heating temperature achievable with electric heating methods is 3,200 °C; it is generally used to heat to temperatures above (C). (A) 1,500 ℃ (B) 1,100 ℃ (C) 1,000 ℃ (D) 1,600 ℃ 4. In chemical production, when the heating temperature is below 180 ℃, (A) heating is generally used. (A) Saturated water vapor (B) Flue gas (C) Electrically heated steam (D) Organic heat carrier heating method Answer: A C C A
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1. When there is a temperature difference inside an object or between two objects in direct contact, the mode of heat transfer by which energy is transferred from the area with a higher temperature to the area with a lower temperature due to molecular vibration is (A). (A) Conduction (B) Convection (C) Radiation (D) Diffusion 2. Radiation is a method of transferring thermal energy through (C). (A) Collisions between adjacent molecules (B) Relative displacement and mixing of particles (C) Electromagnetic waves (D) Free movement of molecules. 3. The highest heating temperature achievable with electric heating methods is 3,200 °C; it is generally used to heat to temperatures above (C). (A) 1,500 ℃ (B) 1,100 ℃ (C) 1,000 ℃ (D) 1,600 ℃ 4. In chemical production, when the heating temperature is below 180 ℃, (A) heating is generally used. (A) Saturated water vapor (B) Flue gas (C) Electrically heated steam (D) Organic heat carrier heating method
1. When there is a temperature difference inside an object or between two objects in direct contact, the mode of heat transfer by which energy is transferred from the area with a higher temperature to the area with a lower temperature due to molecular vibration is (A). (A) Conduction (B) Convection (C) Radiation (D) Diffusion 2. Radiation is a method of transferring thermal energy through (C). (A) Collisions between adjacent molecules (B) Relative displacement and mixing of particles (C) Electromagnetic waves (D) Free movement of molecules. 3. The highest heating temperature achievable with electric heating methods is 3,200 °C; it is generally used to heat to temperatures above (C). (A) 1,500 ℃ (B) 1,100 ℃ (C) 1,000 ℃ (D) 1,600 ℃ 4. In chemical production, when the heating temperature is below 180 ℃, (A) heating is generally used. (A) Saturated water vapor (B) Flue gas (C) Electrically heated steam (D) Organic heat carrier heating method