Exercise: Measurements And Instrumentation

Questions for: Measurements And Instrumentation

To measure a resistance of about 8 ohms we should use
A:
Kelvin's double bridge
B:
Wheatstone bridge
C:
Meggar
D:
Either (b) or (c)
Answer: B
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An induction wattmeter can be used for ac only.
A:
True
B:
False
C:
D:
Answer: A
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Three phase four wire induction energy meter is used to measure
A:
energy in 3 phase balanced star load
B:
energy in 3 phase balanced delta load
C:
energy in 3 phase unbalanced load
D:
either (a) or (b)
Answer: C
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The scale of a dynamometer is linear when used as
A:
ammeter
B:
voltmeter
C:
wattmeter
D:
both (a) and (c)
Answer: C
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Two sinusoidal signals of equal amplitude and frequency are applied to X and Y plate of CRO respectively. The observed Lissajous pattern is a straight line. The phase shift between signals is
A:
zero
B:
90°
C:
either zero or 180°
D:
either 90° or 270°
Answer: C
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