"2020-2021 academic year, second semester, exam paper for Power System and its Automation Major 'Power Electronics Technology' (Volume 2).pdf; 2020-2021 academic year, second semester, exam paper for Power System and its Automation Major 'Power Electronics Technology' (Volume 2).pdf; 1/36
2020-2021 academic year, second semester, exam paper for Power System and its Automation Major 'Power Electronics Technology' (Volume 2)
1. Single-choice questions
1. The power grid that obtains electrical energy from one direction for power users is called ()
A. Open power grid; B. Closed power grid;
2. According to the importance of power user loads, they can be divided into ()
A. one level; B. two levels; C. three levels;
3. The three types of loads have the requirement of power supply reliability ()
A. No sudden power outage at any time; B. Generally no sudden power outage; C. Can be suddenly powered off at any time;
4. Electromagnetic meters are generally used to measure () current and voltage.
A. AC; B. DC;
5. The advantage of electromagnetic meters is that they can measure DC and cannot measure AC.
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A. Can; B. Cannot;
6. The binary number 10101 is converted to decimal number ().
A. 15; B. 21; C. 18;
7. 8421 BCD code 0110 represents the decimal number ().
A. 8; B. 6; C. 42;
8. To represent the decimal number with ten numerical codes, the number of binary codes required is ().
A. 2 bits; B. 3 bits; C. 4 bits;
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