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2-49. The galvanometer-type meter movement
differs from the electrodynamometer
meter movement in that the
electrodynamometer type uses which of
the following components to produce the
magnetic field?
1. Two sets of coils
2. Two permanent magnets
3. One fixed and one movable coil
4. One movable coil and one permanent
magnet
2-50. The fixed coils in the
electrodynamometer-type movement are
wound with heavy wire to enable the
instrument to measure which of the
following values?
1. Rf currents
2. High voltage
3. Large currents
4. High resistance
2-51. An advantage that the
electrodynamometer has over the
standard galvanometer in measuring ac is
that the electrodynamometer requires
1. no rectifying device
2. a less complicated rectifying device
3. less current to obtain a full-scale
deflection
4. fewer multiplier resistors to cover the
measurement range
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INTENTIONALLY.
2-52. When power is being measured with a
wattmeter, why is it important to strictly
observe the safe rating limits for current
and voltage?
1. Because the meter pointer will likely
hit against the upper limit of the dial
and be damaged
2. Because the pointer does not give an
indication to alert the user when the
internal coils are overloaded
3. Because a false reading may be
obtained
4. Because the meter pointer will likely
hit against the lower limit of the dial
and be damaged
2-53. The reading of a wattmeter is dependent
upon which of the following circuit
characteristics?
1. Current
2. Voltage
3. Power factor
4. All of the above
2-54. A continuity test is performed on a piece
of electronic equipment to discover what
kind of fault?
1. High voltage
2. Low voltage
3. Open circuits
4. Changes in component values
2-55. Which of the following meters is
recommended for circuit continuity tests?
1. A megger
2. An ammeter
3. A voltmeter
4. An ohmmeter
