Today, Teacher Ma brought you the electrician exam question bank, and the small partners who need it can click to pay attention to the collection! Pay attention to the WeChat public account [Diligent Worker Pony], get more content, and update it on time at 9 o'clock every day!
1. Judgment questions
1. [Judgment question] If the capacitor is running, the temperature is too high, and ventilation should be strengthened. （ ✘）
2, [judgment question] static electricity phenomenon is a very common electrical phenomenon, its harm is not small, solid static electricity up to 200kV or more, human body static electricity can also reach more than 10KV. （✔）
3. [Judgment question] The rated action current of the RCD refers to the maximum current that can make the RCD action. （ ✘）
4. [Judgment question] The neutral line after the RCD can be grounded. （ ✘）
5. [Judgment question] The power distribution equipment should have a perfect screen protection device. （✔）
2. Single choice questions
1. [Multiple choice question] After the light gas action, ().
A. Jump off the transformer high-voltage side circuit breaker
B. Jump off the low-voltage side circuit breaker of the transformer
C. Only send a signal, do not jump the switch
Answer: C
2. [Single choice question] Relative permeability of antimagnetic substances ()
A. Less than 1
B. Greater than 1
C. Equal to 1
Answer: A
3. [Multiple choice question] The number of the relay protection circuit is composed of ( ) digits and below.
A、2
B、3
C、4
Answer: B
4. [Single choice] When the circuit is closed, the terminal voltage of the power supply () the power supply electromotive force minus the internal resistance voltage drop of the power supply.
A. Greater than
B. Less than
C. Equal
5. [Single choice question] The safety qualification training time for safety production management personnel shall not be less than () hours; the annual training time shall not be less than () hours.
A、10040
B、248
C、 4816dunsimalaoshi
Forward to the circle of friends and share wonderful content with friends!