Exercise: Measurements And Instrumentation

Questions for: Measurements And Instrumentation

The time base of a high frequency CRO whose screen diameter is 10 cm is set at 10 μ sec/cm. The lowest frequency which can be fully displayed on the screen is
A:
more than 100 kHz
B:
equal to 100 kHz
C:
equal to 10 kHz
D:
less than 10 kHz
Answer: C
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In a current transformers
A:
the number of turns in primary and secondary windings are nearly equal
B:
the number of primary turns is very small as compared to number of secondary turns.
C:
the number of secondary turns is very small as compared to the number of primary turns
D:
either (a) or (c).
Answer: B
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Induction wattmeter is an absolute instrument.
A:
True
B:
False
C:
D:
Answer: B
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The accuracy of a multimeter is about
A:
± 0.5%
B:
± 3%
C:
± 0.01%
D:
± 10%
Answer: B
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Which is the displacement transducer with excellent sensitivity, linearity and resolution?
A:
Incremental encoder
B:
Absolute encoder
C:
LVDT
D:
Strain gauge
Answer: C
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