[Soda Ash Knowledge] Question of the Day (118) January 30, 2010
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This post was last edited by 9067jxhuas on 2010-1-30 at 17:36. Daily Question (118), 2010.1.30. Please hide your replies; replies that are not hidden will generally not be graded. Edited posts will not be graded either. Specific hiding method: http://bbs.hcbbs.com/viewthread.php?tid=492556&highlight=%D2%FE%B2%D8The questions in this issue 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
1. Among the following clarifiers, which one has the highest efficiency?
A. Dorr clarifier
B. Inclined plate clarifier
C. Honeycomb clarifier
2. The disadvantages of the Dorr clarifier are: _______, _________, _______, _______.
1. B 2. The clarification process is inefficient; it requires a large area, involves high investment, and is uneconomical
b. The equipment occupies a large area, has a low level of automated control, is complex to operate, and incurs high operating costs for α-cellulose
1. B 2. Clarification: low efficiency, large floor space requirement, high investment, uneconomical
1. Among the sedimentation tanks, the one with the highest efficiency is: B A. Dorr sedimentation tank B. Inclined-plate sedimentation tank C. Honeycomb-type sedimentation tank
2. The disadvantages of the Dorr sedimentation tank are: (low sedimentation efficiency), (large footprint), (high investment cost), (uneconomical).
2. The disadvantages of the Dorr sedimentation tank are: (low sedimentation efficiency), (large footprint), (high investment cost), (uneconomical).
B: Low clarification efficiency, large footprint, high investment, and uneconomical
1. B 2. Low clarification efficiency, large footprint, high investment, uneconomical
1. Among the following clarifiers, the one with the highest efficiency is: (B) A. Dorr clarifier B. Inclined-plate clarifier C. Honeycomb-type clarifier
2. The disadvantages of the Dorr clarifier are: (Low clarification efficiency, large footprint, high investment costs, and uneconomical.) )
2. The disadvantages of the Dorr clarifier are: (Low clarification efficiency, large footprint, high investment costs, and uneconomical.) )
1. B 2. Low clarification efficiency, large footprint, high investment, uneconomical
1. Among the sedimentation tanks, the one with the highest efficiency is: B. Inclined-plate sedimentation tank
1. Among the various types of clarifiers, the one with the highest efficiency is: B
A. Dorr clarifier
B. Inclined plate clarifier
C. Honeycomb-type clarifier
2. The disadvantages of the Dorr clarifier are: low clarification efficiency, large land area requirement, high investment costs, and it is not cost-effective.
A. Dorr clarifier
B. Inclined plate clarifier
C. Honeycomb-type clarifier
2. The disadvantages of the Dorr clarifier are: low clarification efficiency, large land area requirement, high investment costs, and it is not cost-effective.