[Soda Ash Knowledge] One Question per Day (50) 09.11.22
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Please hide the replies; no scoring will be given in principle if they are not hidden. Specific hiding method: http://bbs.hcbbs.com/viewthread.php?tid=492556&highlight=%D2%FE%B2%D8 Posts that have been edited are not rated. (The questions in this issue are taken from page 72 of \"Technical Worker Training Question Bank – Soda Ash Production Operators.\" An electronic version of this book is available for download at the soda ash information sharing site: http://bbs.hcbbs.com/thread-13140-1-2.html) Fill-in-the-blank questions: 1. The balance commonly used in general laboratories is a semi-automatic analytical balance, with a sensitivity of (). 2. When adding or removing weights, they must be picked up using ( ). 3. Errors can be classified into ( ) and ( ) according to their nature of origin. 4. The basic operations of mass analysis include steps such as ( ), ( ), ( ), ( ), ( ) and ( ). 5. The preparatory steps before using a burette include ( ), ( ), ( ), ( ) and ( ).
1. The balance commonly used in general laboratories is a semi-automatic analytical balance with a sensitivity of (0.1 mg). 2. When adding or removing weights, they must be picked up using (tweezers). 3. Errors can be classified into (systematic errors) and (random errors) based on their nature of origin. 4. The basic operations of quality analysis include steps such as (sample dissolution), (precipitation), (filtration), (washing), (drying), and (calcination). 5. The preparatory steps before using a burette include (washing), (oiling), (leak testing), (filling with solution), and (removing bubbles).
1. The balance commonly used in general laboratories is a semi-automatic analytical balance with a sensitivity of (0.1 mg). 2. When adding or removing weights, they must be picked up using (tweezers). 3. Errors can be classified, based on their nature of origin, into (systematic errors) and (random errors). 4. The basic operations of mass analysis include steps such as (sample dissolution), (precipitation), (filtration), ( washing ), ( drying ), and ( calcination ). 5. The preparatory steps before using a burette include ( washing ), ( oiling ), ( leak testing ), ( filling with solution ), and ( removing bubbles ).
1. 0.1mg 2. forceps 3. systematic error, random error 4. sample dissolution, precipitation, filtration, drying, calcination 5. washing, oiling, leak testing, filling with solution, removing bubbles
1. 0.1mg 2. Tweezers 3. Systematic error, random error 4. Sample dissolution, precipitation, filtration, washing, drying, calcination 5. Washing, oiling, leak testing, solution filling, bubble removal
1. 0.1 mg 2. forceps 3. systematic error, random error 4. sample dissolution, precipitation, filtration, washing, drying, calcination 5. washing, oiling, leak testing, filling with solution, removing bubbles
1.0.1mg 2. Tweezers 3. Systematic error, random error 4. Sample dissolution, precipitation, filtration, washing, drying, calcination 5. Washing, oiling, leak testing, filling with solution, removing bubbles
1. The balance commonly used in general laboratories is a semi-automatic analytical balance with a sensitivity of (0.1 mg). 2. When adding or removing weights, they must be picked up using (tweezers). 3. Errors can be classified, based on their nature of origin, into (systematic errors) and (random errors). 4. The basic operations of mass analysis include steps such as (sample dissolution), (precipitation), (filtration), ( washing ), ( drying ), and ( calcination ). 5. The preparatory steps before using a burette include ( washing ), ( oiling ), ( leak testing ), ( filling with solution ), and ( removing bubbles ).
1# chen3jun 1. 0.1mg 2. forceps 3. systematic error, random error 4. sample dissolution, precipitation, filtration, washing, drying, calcination 5. washing, oiling, leak testing, solution filling, bubble removal
This post was last edited by lxq700918 on 2009-11-22 at 10:02. 1. The balance commonly used in general laboratories is a semi-automatic analytical balance with a sensitivity of (0.1mg). 2. When adding or removing weights, they must be handled using (tweezers). 3. Errors can be classified, according to their nature of origin, into (systematic errors) and (random errors). 4. The basic operations of mass analysis include steps such as (sample dissolution), (precipitation), (filtration), (washing), (drying), and (calcination). 5. The preparatory steps before using a burette include (washing), (oiling), (leak testing), (filling with solution), and (removing bubbles). 1# chen3jun
1 0.1mg 2 forceps 3 systematic error random error 4 sample dissolution precipitation filtration washing drying calcination 5 washing lubrication leak testing solution filling bubble removal 5 washing lubrication