Exercise: Measurements And Instrumentation

Questions for: Measurements And Instrumentation

Assertion (A): A thermocouple transducer is based on Seeback effect.

Reason (R): In a thermocouple transducer used for temperature measurement, the cold junction is usually kept in ice bath.

A:
Both A and R are true and R is correct explanation of A
B:
Both A and R are true but R is not correct explanation of A
C:
A is true R is false
D:
A is false R is true
Answer: B
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A generated voltage is equally dependent on three resistances R1, R2, R3 and its value is V = (R1R2)/R3. If tolerance of each resistor is 0.1%, the maximum error in voltage is
A:
0.3%
B:
± 0.3%
C:
0.1%
D:
± 0.1%
Answer: B

The tolerances are additive.

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In a dynamometer 3 phase power factor meter, the planes of the two moving coils are at
A:
60°
B:
0°
C:
120°
D:
90°
Answer: C
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A Weston synchronoscope is a
A:
moving coils instrument
B:
moving iron instrument
C:
dynamometer instrument
D:
induction instrument
Answer: C
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De Sauty bridge is very widely used due to
A:
simplicity
B:
perfect balance for imperfect capacitor
C:
perfect balance for air capacitors
D:
maximum sensitivity
Answer: A
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