Exercise: Measurements And Instrumentation

Questions for: Measurements And Instrumentation

A thermocouple instrument can be used over a very wide frequency range.
A:
True
B:
False
C:
D:
Answer: A
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Assertion (A): If the reading of an instrument is low, the error is large.

Reason (R): The error of an instrument is certain percentage of its full scale deflection.

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: A
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If A = 629 ± 8 and B = 131 ± 3, A - B with range of doubt is
A:
498 ± 8
B:
498 ± 4
C:
498 ± 11
D:
498 ± 13
Answer: C
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Which of these instruments has highest power consumption?
A:
Dynamometer
B:
Electrostatic
C:
Moving coil
D:
Hot wire
Answer: D
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It is required to measure temperature in the range of 1300-1520°C. The most suitable thermocouple is
A:
chromel constantan
B:
iron constantan
C:
chromel aluminium
D:
platinum-rhodium
Answer: D
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