One question per day (multiple-choice) [One Question per Day 090203]
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There are prizes for correct answers; everyone is welcome to participate actively. 1. When filling liquid oxidizers, it is necessary to do so carefully ( ) to prevent leaks caused by thermal expansion. A. A certain amount of space should be left. B. No certain amount of space should be left. C. Leave a little space to fill with inert gas. 2. Night shift work refers to ( ). A. From 21:00 on the same day to 5:00 the next day B. From 22:00 on the same day to 6:00 the next day C. From 20:00 on the same day to 4:00 the next day D. From 19:00 on the same day to 3:00 the next day 3. The ( ) and labels of hazardous chemicals must comply with **regulations. A. Trademark B. Packaging C. Color 4. The purpose of implementing ventilation measures in the explosion-proof workshops of chemical plants is ( ). A. Eliminate oxidizers B. Control combustibles C. Lower the temperature in the workshop 5. The burning of wood in air is a type of （ ） combustion. A. Diffusion B. Evaporation C. Decomposition D. Surface. The answers will be announced by 21:00, and rewards will be given to those who answer correctly.
1. Filling of liquid oxidizers (A) to prevent leakage caused by thermal expansion. A. A certain amount of space should be left. B. No certain amount of space should be left. C. Leave a little space to fill with inert gas. 2. Night shift work refers to (B). A. From 21:00 on the same day to 5:00 the next day B. From 22:00 on the same day to 6:00 the next day C. From 20:00 on the same day to 4:00 the next day D. From 19:00 on the same day to 3:00 the next day 3. The (B) and signs for hazardous chemicals must comply with **regulations. A. Trademark B. Packaging C. Color 4. The purpose of implementing ventilation measures in the explosion-proof workshops of chemical plants is (B). A. Eliminate oxidizers B. Control combustibles C. Lower the temperature in the workshop 5. The combustion of wood in air is a type of (D) combustion. A. Diffusion B. Evaporation C. Decomposition D. Surface
1.c 2.b 3.b 4.b 5.c
1、A 2、B 3、B 4、B 5、C
1.a 2.b 3.b 4.b 5.d
1.C 2 B 3 B 4 B 5C
I chose 1.A, 2.B, 3.B, 4.B, 5.C. Is that correct, OP?
1、A 2、B 3、B 4、B 5、C
1.A2.B3.B4.B5.D
ABBBD decomposition combustion: Combustion that occurs when many solids or non-volatile liquids undergo thermal decomposition to produce flammable gases. Surface combustion (homogeneous combustion): Combustion that takes place on the surface of a solid that has been carbonized as a result of the pyrolysis of a combustible solid such as wood, on that surface covered with amorphous carbon.
1.C 2 B 3 B 4 B 5C
1a 2b 3b 4b 5d
1.a 2.b 3.b 4.b 5.d
Let me answer: 1. Filling of liquid oxidizers (A), to prevent leakage caused by thermal expansion. A. A certain amount of space should be left. B. No certain amount of space should be left. C. Leave a little space to fill with inert gas. 2. Night shift work refers to (B). A. From 21:00 on the same day to 5:00 the next day B. From 22:00 on the same day to 6:00 the next day C. From 20:00 on the same day to 4:00 the next day D. From 19:00 on the same day to 3:00 the next day 3. The (B) and signs for hazardous chemicals must comply with **regulations. A. Trademark B. Packaging C. Color 4. The purpose of implementing ventilation measures in the explosion-proof workshops of chemical plants is (B). A. Eliminate oxidizers B. Control combustibles C. Lower the temperature in the workshop 5. The combustion of wood in air is a type of (D) combustion. A. Diffusion B. Evaporation C. Decomposition D. Surface Last edited by lyhh9024 on 2009-2-3 10:40]
1. Filling of liquid oxidizers (A) to prevent leakage caused by thermal expansion. 2. Night shift work refers to (B). 3. The (B) and labels for hazardous chemicals must comply with **regulations**. 4. The purpose of implementing ventilation measures in the explosion-proof workshops of chemical plants is (B). 5. The combustion of wood in air is a type of (D) combustion.
1A 2B 3B 4B 5D
ABBBD 1: It’s sufficient to leave some space; to prevent thermal expansion, if an inert gas is used, the available space is also compressed； 2. **Provisions** ； Night shifts generally refer to working between 10 p.m. on the same day and 6 a.m. the following day. Since night shift work disrupts workers’ normal daily routines, increases stress on the nervous system, and leads to fatigue, it is demanding work that involves performing tasks under special conditions. 3. The Regulations on the Management of Hazardous Chemicals stipulate clearly that the packaging of hazardous chemicals must comply with the provisions of laws, regulations, and rules, as well as the requirements of relevant standards. 4. To promptly discharge flammable gases into the outdoor area, reduce their accumulation inside the space, and prevent them from reaching the explosive limit. 5. Combustion occurs at the point of contact between air and the solid surface. For example, when wood burns, no combustible gases are produced in the end; only solid carbon remains. The burning takes place at the interface where air comes into contact with the surface of the solid carbon, resulting in a red-hot surface without any flame.
1、A 2、B 3、B 4、B 5、D :lol :victory:
My answer is A, B, B, B, D
My answers are 1, A 2, B 3, B 4, B 5, D
1.a 2.b 3.b 4.b 5.d