Test equipment and measurements

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1. A moving coil meter having a full-scale deflection of 50uA is to be used as the basis of a voltmeter. What ohms-per-volt rating will the meter have? a) 2 kohm/V b) 20 kohm/V c) 50 kohm/V d) 200 kohm/V.

2. An analogue multimeter has an ohms-per-volt rating of 100 kohm/V. What will the input resistance of the meter be when used on the 20V range? a) 20 kohm b) 200 kohm c) 500 kohm d) 2 Mohm.

3. What reading is indicated on the analogue multimeter shown below? a) 18 V d.c. b) 38 V d.c. c) 90 V d.c. d) 120 V d.c..

4. What reading is indicated on the analogue multimeter shown below? a) 29 ohm b) 33 ohm c) 67 ohm d) 290 ohm.

5. What reading is indicated on the digital multimeter shown below? a) 85.3 ohm b) 85.3 mA DC c) 85.3 V DC d) 85.3 A DC.

6. The diagram shows an oscilloscope display using a graticule divided into 1 cm squares. Which one of the following gives the peak-peak value of the waveform? a) 100 mV b) 200 mV c) 400 mV d) 800 mV.

7. The diagram shows an oscilloscope display using a graticule divided into 1 cm squares. Which one of the following gives the frequency of the waveform shown? a) 25 Hz b) 50 Hz c) 100 Hz d) 200 Hz.

8. Which one of the waveforms is an example of cross-over distortion? a) A b) B c) C d) D.

9. The waveform shown below is produced at the output of an amplifier when subjected to a square wave test. Which one of the following statements is TRUE? a) The amplifier has good low-frequency and good high-frequency performance b) The amplifier has good low-frequency and poor high-frequency performance c) The amplifier has poor low-frequency and good high-frequency performance d) The amplifier has poor low-frequency and poor high-frequency performance.

10. The trigger slope control on an oscilloscope is used to: a) select either a.c. or d.c. coupling in the vertical amplifier b) change the frequency response of the vertical deflection system c) determine whether triggering occurs on the positive or negative edge of a signal d) shift the position of the trace on the screen to the left of right of the centre.