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本课程起止时间为:2021-03-10到2021-06-20

Chapter 1 Introduction Chapter Test

1、 问题:The safety voltage for continuous contact with human body is not higher than () V, and the safety current is not higher than () mA.
选项：
A:12, 5
B:24, 10
C:36, 15
D:48, 20
答案: 【24, 10】

2、 问题:In order to improve the effectiveness of classroom experiments, which of the following items shall be done: ()
选项：
A:Before the experiment, a measurement data sheet should be designed and the number and interval of measuring points reasonably selected. If the data to be measured is on the curved part of a curve, more measuring points should be arranged whereas fewer points are required on the smooth part. In this way, better results can be obtained from curve fitting in subsequent data processing.
B:Continuity test shall be conducted on the conductor before overlapping the circuit.
C:Usually, the "loop connection method" is adopted through sequential wiring from the power supply until the whole circuit is completed.
D:For a more complex circuit, it shall be divided into several independent sub-circuits according to its functions and completed step by step.
答案: 【Before the experiment, a measurement data sheet should be designed and the number and interval of measuring points reasonably selected. If the data to be measured is on the curved part of a curve, more measuring points should be arranged whereas fewer points are required on the smooth part. In this way, better results can be obtained from curve fitting in subsequent data processing.;
Continuity test shall be conducted on the conductor before overlapping the circuit.;
Usually, the "loop connection method" is adopted through sequential wiring from the power supply until the whole circuit is completed.;
For a more complex circuit, it shall be divided into several independent sub-circuits according to its functions and completed step by step.】

3、 问题:In the experiment class, which of the following measures shall be taken to protect against electric shock: ()
选项：
A:Do not place drinks, cups and other items on the experiment table.
B:Do not touch experiment devices, instruments and equipment with wet hands.
C:Connect the circuit on an insulation pad carefully according to the circuit diagram, and check it after it is connected. If necessary, ask the teacher to recheck it to ensure that it is correct before switching on the power supply. If it is necessary to change or disconnect the line during the experiment, cut off the power supply before performing any operation.
D:If any abnormal phenomena arise during the experiment such as heating, luminescence, sound and smell, cut off the power supply immediately, report to the teacher and identify the cause to prevent failure propagation.
答案: 【Do not place drinks, cups and other items on the experiment table.;
Do not touch experiment devices, instruments and equipment with wet hands.;
Connect the circuit on an insulation pad carefully according to the circuit diagram, and check it after it is connected. If necessary, ask the teacher to recheck it to ensure that it is correct before switching on the power supply. If it is necessary to change or disconnect the line during the experiment, cut off the power supply before performing any operation.;
If any abnormal phenomena arise during the experiment such as heating, luminescence, sound and smell, cut off the power supply immediately, report to the teacher and identify the cause to prevent failure propagation.】

4、 问题:In the experiment class, in case of an electric shock accident, which of the following measures shall be taken: ()
选项：
A:The first thing is to ensure the safety of the rescuers themselves.
B:Then disconnect the person who gets an electric shock from the power supply. The most effective way to do this is to directly close the switch and cut off the power supply.
C:Insulating objects such as dry wooden sticks shall be used to separate the electric shock victim from the power source.
D:Call the 120 first-aid phone number at once and adopt artificial respiration in case of emergency. Then call Beihang University Alarm Center at 82317119.
答案: 【The first thing is to ensure the safety of the rescuers themselves.;
Then disconnect the person who gets an electric shock from the power supply. The most effective way to do this is to directly close the switch and cut off the power supply.;
Insulating objects such as dry wooden sticks shall be used to separate the electric shock victim from the power source.;
Call the 120 first-aid phone number at once and adopt artificial respiration in case of emergency. Then call Beihang University Alarm Center at 82317119.】

5、 问题:The main causes of electric fires include: ()
选项：
A:Electric leakage
B:Short circuit
C:Excess load
D:Excessive contact resistance
答案: 【Electric leakage;
Short circuit;
Excess load;
Excessive contact resistance】

6、 问题:Which of the following shall be used for extinguishing electric fire: ()
选项：
A:Water
B:Carbon-dioxide (fire) extinguisher
C:Foam fire extinguisher
D:Powder fire extinguisher
答案: 【Carbon-dioxide (fire) extinguisher;
Powder fire extinguisher】

Chapter 2 Common Instruments Chapter Test

小提示:本节包含奇怪的同名章节内容

1、 问题:What factors shall be considered when selecting instruments? ()
选项：
A:Accuracy of instruments.
B:Impedance of instrument.
C:Frequency range of instrument.
D:All of the above shall be considered.
答案: 【All of the above shall be considered.】

2、 问题:Which wiring method shall be selected to measure 10kΩ resistance using TH1941 digital multimeter? ()
选项：
A:
B:
C:
D:All of the above methods are OK.
答案: 【】

3、 问题:Which system shall be adjusted to stably display the measured waveform on the oscilloscope? ()
选项：
A:Vertical system.
B:Horizontal system.
C:Triggering system.
D:All of the above shall be adjusted.
答案: 【Triggering system.】

4、 问题:Which methods could be used for measuring signal amplitude with a digital oscilloscope? ()
选项：
A:Calculation of grid number.
B:CURSOR measurement method.
C:MEASURE measurement method.
D:All of the above methods are OK.
答案: 【All of the above methods are OK.】

5、 问题:Using digital oscilloscope to observe the waveform of DC signal, which coupling method shall be selected for the measurement channel? ()
选项：
A:DC coupling.
B:AC coupling.
C:Grounding.
D:All of the above are acceptable.
答案: 【DC coupling.】

6、 问题:Which two terminals shall be selected when MPS-3003LK-3 DC stabilized power supplies is used to output +12V? ()
选项：
A:1, 3
B:2, 3
C:4, 5
D:All of the above are acceptable.
答案: 【1, 3】

7、 问题:The signal output of the function signal generator can be short circuited. ()
选项：
A:正确
B:错误
答案: 【错误】

8、 问题:Which two terminals shall be selected when MPS-3003LK-3 DC stabilized power supplies is used to output +12V? ()

选项：
A:1, 3
B:2, 3
C:4, 5
D:All of the above are acceptable.
答案: 【1, 3】

Chapter 3 Circuit Design and Simulation Chapter Test

小提示:本节包含奇怪的同名章节内容

1、 问题:When using Proteus software to control the visual field of the editing area, press keys F5 (), F6 (), F7 (), F8 ().    (1) Reduce. (2) Amplify. (3) Display the whole drawing. (4) Display a graph centered on the mouse pointer.The correct order should be: ()
选项：
A:(1), (2), (3), (4).
B:(4), (2), (1), (3).
C:(1), (3), (2), (4).
D:(4), (1), (2), (3).
答案: 【(4), (2), (1), (3).】

2、 问题:When using an oscilloscope to observe signals, the trigger function plays an important role in stabilizing the signal waveform, and the trigger level shall generally be adjusted to: ()
选项：
A:The middle of the observation area.
B:The peak of the observation signal.
C:Within the amplitude range of the observed waveform.
D:The valley of the observation signal.
答案: 【Within the amplitude range of the observed waveform.】

3、 问题:During the "common-emitter amplifier" simulation test, the Quiescent point can be adjusted by using: ()
选项：
A:Voltage probe
B:Current probe
C:AC voltmeter
D:DC voltmeter
答案: 【Voltage probe;
Current probe;
DC voltmeter】

4、 问题:When using Proteus software, it is necessary to check the electrical rules after connecting the circuit. ()
选项：
A:正确
B:错误
答案: 【正确】

5、 问题:When using Proteus software, click "Run Simulator by Dynamic Frame" to facilitate single-step operation and observe the simulation process. ()
选项：
A:正确
B:错误
答案: 【正确】

6、 问题:When using a probe to test current, it is required that the arrow of current probe be perpendicular to the conductor, otherwise an error will be reported. ()
选项：
A:正确
B:错误
答案: 【错误】

7、 问题:During the "common-emitter amplifier" simulation test, dynamic parameters shall be measured while ensuring the output waveform is not distorted. ()
选项：
A:正确
B:错误
答案: 【正确】

8、 问题:When using Proteus software to control the visual field of the editing area, press keys F5 (), F6 (), F7 (), F8 ().
    (1) Reduce. (2) Amplify. (3) Display the whole drawing. (4) Display a graph centered on the mouse pointer.
The correct order should be: ()
选项：

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