Multiple-choice questions (answers released)
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Multiple-choice question: 1. In a fire caused by chemical substances, the material that can be used to extinguish the fire is (D). A. Sodium metal B. Phosphorus pentoxide C. Peroxides D. Aluminum oxide 2. The correct method of using electricity is (D). A. Touching the live parts of electrical equipment with bare hands B. Touching the power source with wet hands C. Using a power supply with a voltage higher than the rated voltage of the electrical equipment D. Ensuring that the electrical equipment has a properly connected ground wire. 3. For precipitates that can be weighed after simply being dried, (D) should be used for filtration. A. Qualitative filter paper B. Quantitative filter paper C. Ashless filter paper D. Glass sand-core crucible or funnel 4. If the outlet at the tip of an acid burette is blocked by a lubricating ester, the quick and effective way to deal with this issue is (A). A. Soak in hot water and shake vigorously. B. Pass a thin wire through it and wash with water. C. Fill it with water and use the pressure of the water column to force it out. D. Use a syringe to draw it out. Last edited by Canghai Yili Sand on 2009-3-9 08:21.]
1 C 2 D 3B 4D
1、D 2、D 3、B 4、D
Multiple-choice question: 1. In a fire caused by chemical substances, the material that can be used to extinguish the fire is (B). A. Sodium metal B. Phosphorus pentoxide C. Peroxides D. Aluminum oxide 2. The correct method of using electricity is (D). A. Touching the live parts of electrical equipment with bare hands B. Touching the power source with wet hands C. Using a power supply with a voltage higher than the rated voltage of the electrical equipment D. Ensuring that the electrical equipment has properly grounded casings. 3. For precipitates that can be weighed after simply being dried, (A) should be used for filtration. A. Qualitative filter paper B. Quantitative filter paper C. Ashless filter paper D. Glass sand-core crucible or funnel 4. If the tip of an acid burette is blocked by a lubricating ester, the fast and effective way to deal with this issue is (D). A. Soak in hot water and shake vigorously. B. Pass a thin wire through it and wash with water. C. Fill it with water and use the pressure of the water column to force it out. D. Suck it using an ear syringe
1、D 2、D 3、D 4、D
1、D 2、D 3、D 4、A
1、D 2、D 3、B 4、D
1. For fires caused by chemical substances, the substance that can be used to extinguish them is (D). A. Sodium metal B. Phosphorus pentoxide C. Peroxides D. Aluminum oxide 2. The correct method of using electricity is (D). A. Touching the live parts of electrical equipment with bare hands B. Touching the power source with wet hands C. Using a power supply with a voltage higher than the rated voltage of the electrical equipment D. Ensuring that the electrical equipment has a properly connected ground wire. 3. For precipitates that can be weighed after simply being dried, (B) should be used for filtration. A. Qualitative filter paper B. Quantitative filter paper C. Ashless filter paper D. Glass sand-core crucible or funnel 4. If the tip of an acid burette is blocked by a lubricating ester, the fast and effective way to deal with this issue is (D). A. Soak in hot water and shake vigorously. B. Pass a thin wire through it and wash with water. C. Fill it with water and use the pressure of the water column to force it out. D. Suck it using an ear syringe
1D； 2D ； 3B ； 4D
1. For fires caused by chemical substances, the substance that can be used to extinguish them is (D). A. Sodium metal B. Phosphorus pentoxide C. Peroxides D. Aluminum oxide 2. The correct method of using electricity is (D). A. Touching the live parts of electrical equipment with bare hands B. Touching the power source with wet hands C. Using a power supply with a voltage higher than the rated voltage of the electrical equipment D. Ensuring that the electrical equipment has a properly connected ground wire. 3. For precipitates that can be weighed after simply being dried, (D) should be used for filtration. A. Qualitative filter paper B. Quantitative filter paper C. Ashless filter paper D. Glass sand-core crucible or funnel 4. If the outlet at the tip of an acid burette is blocked by a lubricating ester, the fast and effective way to deal with this issue is (B). A. Soak in hot water and shake vigorously. B. Pass a thin wire through it and wash with water. C. Fill it with water and use the pressure of the water column to force it out. D. Suck it using an ear syringe
1. For fires caused by chemical substances, the substance that can be used to extinguish them is (D). A. Sodium metal B. Phosphorus pentoxide C. Peroxides D. Aluminum oxide 2. The correct method of using electricity is (D). A. Touching the live parts of electrical equipment with bare hands B. Touching the power source with wet hands C. Using a power supply with a voltage higher than the rated voltage of the electrical equipment D. Ensuring that the electrical equipment has a properly connected ground wire. 3. For precipitates that can be weighed after simply being dried, (D) should be used for filtration. A. Qualitative filter paper B. Quantitative filter paper C. Ashless filter paper D. Glass sand-core crucible or funnel 4. If the outlet at the tip of an acid burette is blocked by a lubricating ester, the quick and effective way to deal with this issue is (A). A. Soak in hot water and shake vigorously. B. Pass a thin wire through it and wash with water. C. Fill it with water and use the pressure of the water column to force it out. D. Use a syringe to draw it out. OP, this seems to be a question from the National Chemical Testing Technician Skills Competition: lol
1. For fires caused by chemical substances, the substance that can be used to extinguish them is (B). A. Sodium metal B. Phosphorus pentoxide C. Peroxides D. Aluminum oxide 2. The correct method of using electricity is (D). A. Touching the live parts of electrical equipment with bare hands B. Touching the power source with wet hands C. Using a power supply with a voltage higher than the rated voltage of the electrical equipment D. Ensuring that the electrical equipment has properly grounded casings. 3. For precipitates that can be weighed after simply being dried, (B) should be used for filtration. A. Qualitative filter paper B. Quantitative filter paper C. Ashless filter paper D. Glass sand-core crucible or funnel 4. If the outlet at the tip of an acid burette is blocked by a lubricating ester, the quick and effective way to deal with this issue is (A). A. Soak in hot water and shake vigorously. B. Pass a thin wire through it and wash with water. C. Fill it with water and use the pressure of the water column to force it out. D. Suck it using an ear syringe
1D 2D 3B 4A
1、D 2、D 3、B 4、D
I think it’s also 1, D; 2, D; 3, B; 4, D
1.D 2.D 3.B 4.D
1D； 2D ； 3B ； 4D:lol
1、D 2、D 3、B 4、D
Multiple-choice question: 1. In a fire caused by chemical substances, the material that can be used to extinguish the fire is (D). A. Sodium metal B. Phosphorus pentoxide C. Peroxides D. Aluminum oxide 2. The correct method of using electricity is (D). A. Touching the live parts of electrical equipment with bare hands B. Touching the power source with wet hands C. Using a power supply with a voltage higher than the rated voltage of the electrical equipment D. Ensuring that the electrical equipment has properly grounded casings. 3. For precipitates that can be weighed after simply being dried, (B) should be used for filtration. A. Qualitative filter paper B. Quantitative filter paper C. Ashless filter paper D. Glass sand-core crucible or funnel 4. If the tip of an acid burette is blocked by a lubricating ester, the fast and effective way to deal with this issue is (D). A. Soak in hot water and shake vigorously. B. Pass a thin wire through it and wash with water. C. Fill it with water and use the pressure of the water column to force it out. D. Suck it using an ear syringe