电子测量(英文)试卷

山东科技大学2007—2008 学年第一学期

《电子测量技术》考试试卷（A卷）

班级 姓名 学号 SECTION A (Total marks 25)

(Marking scheme: +1 mark for correct answer; -1 for incorrect; 0 for no answer)

Enter T (true) or F (false) against each of the following statements

1. When pressure is measured it is called an indirect measurement. [ ] 2. Telemetry involves sending measurement information between places. [ ] 3. A wattmeter is a direct analogue recording instrument. [ ]

4. An electronic thermometer with an LCD output is a direct digital recording instrument. [ ]

5. When a strain gauge is pulled (stretched) its resistance decreases. [ ] 6. A photo-diode can behave as an electric generator. [ ] 7. A photo-transistor does not have a Base connection. [ ]

8. A thermocouple comprises wires of two different metals joined together. [ ] 9. The piezo effect in a crystal means that changes of pressure will produce changes of voltage. [ ]

10. In an operational amplifier (op-amp) the gain is assumed to be very large. [ ] 11. The op-amp inverting circuit has a negative gain. [ ] 12. The op-amp differentiator circuit requires a switch. [ ]

13. When the op-amp is used as a comparator there is no feedback resistor. [ ] 14. The D’Arsonval movement has a fixed magnet and moving coil. [ ]