One question per day (multiple-choice) [One Question per Day 090208]
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There are prizes for correct answers; everyone is welcome to participate actively. 1. The static voltage can reach up to ( ), and discharge can occur on site, generating static sparks that may cause fires. A. 50 volts B. Tens of thousands of volts C. 220 volts 2. According to international standards, there is no need to consider the risk of electric shock at voltages below ( ) volts. A. 36 volts B. 65 volts C. 25 volts 3. The red wire in a three-wire cable represents ( ). A. Neutral wire B. Live wire C. Ground wire 4. During maintenance work with power outage, which type of sign should be hung on the operating handle of a switch or disconnect switch that can supply power to the work area as soon as it is closed? ( ) A. “Work in progress” B. “Stop, high voltage – dangerous” C. “Do not close – someone is working here” 5. In electric shock accidents, the vast majority are caused by ( ). A. The human body is shocked by an electric current. B. Burns. C. Electroshock. The answers will be announced before 21:00, and rewards will be given to those who answer correctly.
1. The static voltage can reach up to (B), and discharge can occur on-site, generating static sparks that may cause fires. A. 50 volts B. Tens of thousands of volts C. 220 volts 2. According to international standards, there is no need to consider the risk of electric shock at voltages below (A) volts. A. 36 volts B. 65 volts C. 25 volts 3. The red wire in a three-wire cable represents (B). A. Neutral wire B. Live wire C. Ground wire 4. During maintenance work when power can be supplied to the work area as soon as the switch or disconnect is closed, which type of sign should be hung on its operating handle? (C) A. “Work in progress” B. “Stop, high voltage – dangerous” C. “Do not close – someone is working” 5. In electric shock accidents, the vast majority are caused by (A). A. The human body is shocked by an electric current B. Burns C. Electroshock
My answer: B A B C B
1. The static voltage can reach up to (B), and discharge can occur on-site, generating static sparks that may cause fires. A. 50 volts B. Tens of thousands of volts C. 220 volts 2. According to international standards, there is no need to consider the risk of electric shock at voltages below (A) volts. A. 36 volts B. 65 volts C. 25 volts 3. The red wire in a three-wire cable represents (B). A. Neutral wire B. Live wire C. Ground wire 4. During maintenance work when power can be supplied to the work area as soon as the switch or disconnect is closed, which type of sign should be hung on its operating handle? (C) A. “Work in progress” B. “Stop, high voltage – dangerous” C. “Do not close – someone is working” 5. In electric shock accidents, the vast majority are caused by (A). A. The human body is shocked by an electric current B. Burns C. Electroshock
1.B2.A3.B4.C5.C
1 B 2 C 3 B 4 C 5 A
1、B 2、C 3、B 4、C 5、A
1、B 2、A 3、B 4、C 5、A Last edited by cai*ansheng on 2009-2-8 09:53 ]
1.B 2.C 3.B 4.C 5.A
1. The static voltage can reach up to (B), and discharge can occur on-site, generating static sparks that may cause fires. B. Tens of thousands of volts. 2. According to international standards, there is no need to consider the risk of electric shock for voltages below (A) volts. A. 36 volts 3. The red wire in a three-wire cable represents (B). B. Live wire 4. During maintenance when power is off, which type of sign should be hung on the operating handle of the switch or disconnect switch that can supply power to the work area as soon as it is closed? (C) C. “Do not close – people are working here.” 5. In electric shock accidents, the vast majority of cases are caused by (A)
1. The static voltage can reach up to (B), and discharge can occur on-site, generating static sparks that may cause fires. A. 50 volts B. Tens of thousands of volts C. 220 volts. 2. According to international standards, there is no need to consider the risk of electric shock at voltages below (C) volts. A. 36 volts B. 65 volts C. 25 volts 3. The red wire in a three-wire cable represents (B). A. Neutral wire B. Live wire C. Ground wire 4. During maintenance work when power can be supplied to the work area as soon as the switch or disconnect switch is closed, which type of sign should be hung on its operating handle? (C) A. “Work in progress” B. “Stop, high voltage – dangerous” C. “Do not close – someone is working” 5. In electric shock accidents, the vast majority are caused by (A). A. The human body is shocked by an electric current B. Burns C. Electroshock
1.B2.A3.B4.C5.C
My choices: 1. B, 2. A, 3. B, 4. C, 5. A
1. The static voltage can reach up to (B), and discharge can occur on-site, generating static sparks that may cause fires. A. 50 volts B. Tens of thousands of volts C. 220 volts 2. According to international standards, there is no need to consider the risk of electric shock at voltages below (A) volts. A. 36 volts B. 65 volts C. 25 volts 3. The red wire in a three-wire cable represents (B). A. Neutral wire B. Live wire C. Ground wire 4. During maintenance work when power can be supplied to the work area as soon as the switch or disconnect is closed, which type of sign should be hung on its operating handle? (C) A. “Work in progress” B. “Stop, high voltage – dangerous” C. “Do not close – someone is working” 5. In electric shock accidents, the vast majority are caused by (A). A. The human body is shocked by an electric current B. Burns C. Electroshock
1. The static voltage can reach up to (b), and discharge can occur on-site, generating static sparks that may cause fires. A. 50 volts B. Tens of thousands of volts C. 220 volts. 2. According to international standards, there is no need to consider the risk of electric shock at voltages below (C) volts. A. 36 volts B. 65 volts C. 25 volts 3. The red wire in a three-wire cable represents (b). A. Neutral wire B. Live wire C. Ground wire 4. During maintenance work with power outage, which type of sign should be hung on the operating handle of the switch or disconnect switch that can supply power to the work area as soon as it is closed? (C) A. “Work in progress” B. “Stop, high voltage – dangerous” C. “Do not close – someone is working here” 5. In electric shock accidents, the vast majority are caused by (a). A. The human body is shocked by an electric current B. Burns C. Electroshock
1.B 2.A 3.B 4.C 5.A
1、B 2、A 3、B 4、C 5、A