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Choose the letter of the best answer in each questions.
1. Circuit measurement is used for which of the following purposes?
- A. To find the weight of a circuit
- B. To increase the power used in a circuit
- C. To discover the length and width of a circuit
- D. To determine the reason a circuit is not functioning properly
2. An in-circuit meter is used for which of the following purposes?
- A. To reduce circuit losses
- B. To monitor circuit operation
- C. To control power to a circuit
- D. To prevent circuit overload conditions
3. Out-of-circuit meters have which of the following advantages over in circuit meters?
- A. They can be used on more than one device
- B. They are lighter weight
- C. They are more rugged
- D. All of the above
7. The d'Arsonval meter movement is based on which of the following principles?
- A. Moving vane
- B. Electrostatic
- C. Electrodynamic
- D. Permanent-magnet moving-coil
8. Current through a meter results in the pointer. In d'Arsonval meter movement, what force produces this deflection?
- A. Thermocouple action
- B. Electrostatic repulsion
- C. Mechanical spring tension
- D. The interaction of magnetic fields
9. The hairsprings in a d'Arsonval meter movement perform which of the following functions?
- A. They keep the pointer in the position of the last indication when current is removed
- B. They aid the movement of the pointer when there is current through the meter
- C. They make electrical connections to the meter movement
- D. All of the above
12. What device allows a d'Arsonval meter movement to measure ac by converting ac to pulsating dc?
- A. A pulsator
- B. A modulator
- C. A rectifier
- D. A converter
13. What is meant by the term "meter damping"?
- A. Moistening the felt pads
- B. Smoothing the oscillations of the pointer
- C. Preventing excessive current through the coil
- D. Compensating for electromagnetic induced interference
14. Which of the following methods is used to dampen a meter?
- A. Mount the meter in a mu-metal case
- B. Install a fuse in one of the input leads
- C. Incorporate an airtight chamber containing a van
- D. Provide a fluid reservoir and sponge arrangement next to the pads
15. A d'Arsonval meter movement reacts to which of the following values of voltage?
- A. Peak
- B. Average
- C. Effective
- D. Peak-to-peak
16. What value of ac is indicated by a meter scale?
- A. Peak
- B. Average
- C. Effective
- D. Peak-to-peak
17. Which of the following meter movements will measure either ac or dc without the use of a rectifier?
- A. GMS
- B. d'Arsonval
- C. Electrostatic
- D. Electrodynamic
18. What electrical property is reacted to by the electrodynamic, d'Arsonval, moving vane, and thermocouple meter movements?
- A. Power
- B. Current
- C. Voltage
- D. Resistance
19. What electrical property is measured by an ammeter?
- A. Power
- B. Current
- C. Voltage
- D. Resistance
20. How are ammeters connected in an electrical circuit?
- A. In series with the load
- B. In parallel with the load
- C. In accordance with Lenz's Law
- D. In series-parallel with the load
21. How does an ammeter affect the circuit being measured?
- A. It acts as a resistances in series and lowers the circuit current
- B. It acts as a resistance in series and raises the circuit current
- C. It acts as a resistance in parallel and lowers the circuit current
- D. It acts as a resistance in parallel and raises the circuit current
22. How is the effect that an ammeter produces in a circuit kept to a minimum?
- A. By using a large resistor in series with the ammeter
- B. By using a large capacitor in parallel with the ammeter
- C. By ensuring that the meter resistance is low compared to circuit resistance
- D. By ensuring that the meter resistance is high compared to circuit resistance
23. The ammeter with the greatest sensitivity has which of the following characteristics?
- A. The lowest amount of current for fullscale deflection indication
- B. The highest amount of current for fullscale deflection indication
- C. A low ratio of internal resistance to full-scale deflection indication
- D. A high ratio of internal resistance to full-scale deflection indication
24. Ammeters measure various ranges through the addition of which of the following components?
- A. Shunt resistors in series with the meter movement
- B. Shunt resistors in parallel with the meter movement
- C. Capacitors in series with the meter movement
- D. Capacitors in parallel with the meter movement
25. What range of an ammeter should you use for an initial measurement?
- A. The lowest range
- B. The highest range
- C. The mid-scale range
- D. None of these
26. What portion of the ammeter scale should be used to take a final reading?
- A. The upper half
- B. The lower half
- C. The mid-scale portion
- D. Anywhere on the meter face
27. When, if ever, can you use a dc ammeter to measure ac values?
- A. When the ac is high frequency
- B. For low values
- C. Always
- D. Never
28. Which of the following safety precautions should be observed prior to connecting an ammeter into a circuit?
- A. Switch to the highest range
- B. Observe proper dc polarity
- C. Deenergize the circuit
- D. All of the above
29. What electrical property is measured by a voltmeter?
- A. Power
- B. Current
- C. Voltage
- D. Resistance
30. A voltmeter should be connected in an electrical circuit in what manner?
- A. In series with the load
- B. In parallel with the load
- C. In accordance with Lenz's Law
- D. In series-parallel with the load
31. A voltmeter has an effect on the circuit being measured; what is this effect called?
- A. Loading
- B. Damping
- C. Rectification
- D. Eddy-current drag
32. To keep the effect of a voltmeter on a circuit to a minimum, the internal resistance of the voltmeter must have which of the following relationships to the circuit load?
- A. Equal to
- B. Lower than
- C. Higher than
- D. In proportion to
33. Which of the following types of meters can be made from a current sensitive meter movement?
- A. Ammeter
- B. Ohmmeter
- C. Voltmeter
- D. Each of the above
34. A voltmeter has a high sensitivity when it has which of the following characteristics?
- A. Low deflection indication
- B. High deflection indication
- C. Low ratio of internal resistance to full scale deflection indication
- D. High ratio of internal resistance to full-scale deflection indication
35. Which of the following configurations extends the range of a voltmeter?
- A. A resistor in series with the meter movement
- B. A resistor in parallel with the meter movement
- C. A capacitor in series with the meter movement
- D. A capacitor in parallel with the meter movement
36. What voltmeter range should be used for initial measurements?
- A. The lowest
- B. The highest
- C. The mid-scale
- D. None of these
37. The electrostatic meter movement reacts to which of the following electrical properties?
- A. Power
- B. Current
- C. Voltage
- D. Resistance
38. Electrostatic meter movements are used to measure which of the following current/voltage values?
- A. Low voltage
- B. Low current
- C. High voltage
- D. High current
39. Which of the following safety precautions should be observed when a voltmeter is used?
- A. Deenergize the circuit before connecting the meter
- B. Start with the lowest range of the meter
- C. Connect the meter in series with the circuit
- D. All of the above
40. What electrical property is measured with an ohmmeter?
- A. Power
- B. Current
- C. Voltage
- D. Resistance
41. An ohmmeter is used to check for which of the following conditions?
- A. Continuity
- B. Overheating
- C. Overcurrent
- D. Undercurrent
42. How should an ohmmeter be connected in an electrical circuit?
- A. In series with the load
- B. In parallel with the load
- C. In parallel with the source
- D. In series-parallel with the load
43. An ohmmeter can measure different ranges because of the use of which of the following components?
- A. Range coils
- B. Range resistors
- C. Range capacitors
- D. Range potentiometers
44. What area of an ohmmeter scale should be used when a measurement is taken?
- A. Upper half
- B. Lower half
- C. Mid-scale portion
- D. Anywhere on the meter face
45. Ohmmeter are classified by type. What are the two types of ohmmeters?
- A. Series and shunt
- B. Normal and reverse
- C. Full- and half-scale
- D. None of these
46. What is the most obvious differences in the two types of ohmmeters?
- A. The ranges of the meters
- B. The scales of the meters
- C. The power sources of the meters
- D. The size of the test leads of the meters
47. Which of the following safety precautions should be observed when an ohmmeter is used?
- A. Always start with the highest scale of the meter
- B. Deenergize the circuit before connecting the meter
- C. Observe proper polarity
- D. All of the above
48. Meggers (megohmmeters) are used to measure which of the following quantities?
- A. Low voltage
- B. High voltage
- C. Low resistance
- D. High resistance
49. When a megger is used to check the insulation of a wire, which of the following indications should be considered normal?
- A. ∞
- B. 0
- C. 500 V
- D. 1000 V
50. Which of the following safety precautions should be observed when a megger is used?
- A. Do not use a dc megger to measure circuits that are powered by ac
- B. Always start with the highest scale selection of the meter
- C. Do not touch the meter leads when a measurement is being taken
- D. All of the above
51. A multimeter can be used to measure which of the following electrical properties?
- A. Voltage
- B. Current
- C. Resistance
- D. Each of the above
52. The function switch on a multimeter does NOT perform which of the following functions?
- A. Selection of the meter range
- B. Determination of the proper scale
- C. Selection of ac or dc capability
- D. Changing of the multimeter from an ammeter to a voltmeter
53. One of the problems encountered in building a multimeter is that the meter movement gives different readings for the same values of ac and dc. Which of the following features of a multimeter will solve this problem?
- A. A rectifier
- B. An ac/dc switch
- C. Separate scales for ac and dc
- D. A mirror on the face of the meter
54. Why is there a mirror on the face of a multimeter?
- A. To illuminate the meter face
- B. To aid in reducing parallax error
- C. To reduce the friction between the pointer and the meter face
- D. To compensate for the difference in ac and dc measurements
55. If the mirror on the face of a multimeter is used properly, where will the image of the pointer appear?
- A. Hidden behind the pointer
- B. Barely visible on either side of the pointer
- C. Clearly visible to the left of the pointer
- D. Clearly visible to the right of the pointer
56. Which of the following safety precautions does NOT apply to a multimeter?
- A. Observe proper dc polarity when measuring dc
- B. Deenergize the circuit before connecting the meter
- C. Be sure the meter is switched to ac for ac measurements
- D. Never apply power to the circuit when measuring voltage with the meter
57. If a multimeter has no OFF position, and it is returned to storage, on which of the following positions should the meter be set?
- A. +dc; highest voltage range
- B. -dc; higher resistance range
- C. Ac; highest voltage range
- D. Ac; highest current range
58. When the current in a conductor is measured without the conductor being disconnected, which of the following meters could be used?
- A. Multimeter
- B. Hook-on voltameter
- C. Induction wattmeter
- D. Transformer voltmeter
59. Which of the following electrical quantities is measured by a wattmeter?
- A. Power
- B. Energy
- C. Voltage
- D. Current
60. Which of the following electrical quantities is measured by a watt hour meter?
- A. Power
- B. Energy
- C. Voltage
- D. Current
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