6 1-47.   Which of the following safety precautions should be observed when an ohmmeter is used? 1.    Always start with the highest scale of the meter 2.    Deenergize the circuit before connecting the meter 3.    Observe proper polarity 4.    All of the above 1-48.   Meggers (megohmmeters) are used to measure which of the following quantities? 1.    Low voltage 2.    High voltage 3.    Low resistance 4.    High resistance 1-49.   When a megger is used to check the insulation of a wire, which of the following indications should be considered normal? 1. 2. 0 3. 500 V 4.    1000 V 1-50.   Which of the following safety precautions should be observed when a megger is used? 1.    Do not use a dc megger to measure circuits that are powered by ac 2.    Always start with the highest scale selection of the meter 3.    Do not touch the meter leads when a measurement is being taken 4.    All of the above 1-51.   A multimeter can be used to measure which of the following electrical properties? 1.    Voltage 2.    Current 3.    Resistance 4.    Each of the above 1-52.   The function switch on a multimeter does NOT perform which of the following functions? 1.    Selection of the meter range 2.    Determination of the proper scale 3.    Selection of ac or dc capability 4.    Changing of the multimeter from an ammeter to a voltmeter 1-53.   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? 1.    A rectifier 2.    An ac/dc switch 3.    Separate scales for ac and dc 4.    A mirror on the face of the meter 1-54.   Why is there a mirror on the face of a multimeter? 1.    To illuminate the meter face 2.    To aid in reducing parallax error 3.    To reduce the friction between the pointer and the meter face 4.    To compensate for the difference in ac and dc measurements 1-55.   If the mirror on the face of a multimeter is used properly, where will the image of the pointer appear? 1.    Hidden behind the pointer 2.    Barely visible on either side of the pointer 3.    Clearly visible to the left of the pointer 4.    Clearly visible to the right of the pointer