[Soda Ash Knowledge] Question of the Day (128) February 8, 2010
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Please hide replies; in principle, no scoring will be done if they are not hidden. Edited posts will not be scored. Specific hiding method: http://bbs.hcbbs.com/viewthread.php?tid=492556&highlight=%D2%FE%B2%D8 This month’s questions are taken from the book “Question Bank for Technical Workers’ On-the-Job Training – Operators in Soda Ash Production”. Electronic version of the book can be downloaded here: http://bbs.hcbbs.com/thread-13140-1-2.html I. True or False questions: 1. After ammonia is absorbed by brine, its relative density increases due to the increase in solute concentration. ( ) 2. The rate at which brine absorbs ammonia is essentially the flow rate of the brine within the ammonia absorption tower. ( ) 3. When the size of solid particles remains constant in a flowing fluid, the magnitudes of gravity and buoyancy acting on the particles during sedimentation also remain constant. ( ) 4. Common gases such as NH3, CO2, H2S, etc., are poorly soluble gases. ( )
1. After absorbing ammonia, the relative density of brine increases due to the increase in solute. (Wrong) 2. The rate at which brine absorbs ammonia is actually the flow rate of the brine within the ammonia absorption tower. ( Incorrect ) 3. When the size of solid particles in a flowing fluid remains constant, the magnitudes of gravity and buoyancy acting on the particles during sedimentation also remain constant. ( Correct ) 4. Common gases such as NH3, CO2, H2S, etc., are poorly soluble gases. (Wrong)
1. Wrong 2. Wrong 3. Correct 4. Wrong
1. After absorbing ammonia, the relative density of brine increases due to the increase in solute. ( Wrong ) 2. The rate at which brine absorbs ammonia is essentially the flow rate of the brine within the ammonia absorption tower. ( Incorrect ) 3. When the size of solid particles in a flowing fluid remains constant, the magnitudes of gravity and buoyancy acting on the particles during sedimentation also remain constant. ( Correct ) 4. Common gases such as NH3, CO2, H2S, etc., are poorly soluble gases. (Wrong)
1. × 2. × 3. × 4×
Wrong, Right, Wrong, Wrong 1# 9067jxhuas