Question

laboratory entrance examination 2025
总共50题共100分
二.多选题(共12题,共24分)
帐号:姓名:考试时间:60分钟剩余时间:39分12秒
33.although the electrostatic charge is not large, the static sparks generated during discharge may cause explosions and fires. it is common f
or the instantaneous current during discharge to damage the precision experimental instruments. the correct preventi (2分)
□a.properly increase the humidity in the workplace
□b.when carrying out special dangerous experiments, the operator should first touch the metal grounding bar installed in the safety zone to
eliminate the potential of the human body. try to wear working clothes that are not suitable for generating static electricity. do not comb the
hair where static electricity is easily generated.
□c.when the computer is being maintained, touch the other metal conductors first and then disassemble
进度:33/50

Explanation:

• Option A: Increasing humidity can reduce static electricity as water molecules can help dissipate charges.
• Option B: Touching a metal grounding bar can discharge the static electricity on the human body, and wearing non - static - generating clothes and avoiding combing hair (which can generate static) are valid preventive measures.
• Option C: When maintaining a computer, touching other metal conductors first can discharge the static electricity on the body, preventing damage to the computer components due to static discharge.

Answer:

A. Properly increase the humidity in the workplace, B. When carrying out special dangerous experiments, the operator should first touch the metal grounding bar installed in the safety zone to eliminate the potential of the human body. Try to wear working clothes that are not suitable for generating static electricity. Do not comb the hair where static electricity is easily generated, C. When the computer is being maintained, touch the other metal conductors first and then disassemble.