Exercise: Measurements And Instrumentation

Questions for: Measurements And Instrumentation

Assertion (A): Secondary instruments require calibration at frequent intervals.

Reason (R): Secondary instruments have many errors.

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 n measurements of a quantity are made, the arithmetic mean is
A:
B:
C:
D:
none of the above
Answer: B
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A resistance strain gauge is usually
A:
wire grid type
B:
foil type
C:
any of these
D:
none of these
Answer: C
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To avoid the effect of stray magnetic fields in ac bridge we can use
A:
magnetic screening
B:
Wagner earthing device
C:
wave filter
D:
transformer
Answer: A
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For measurement of high voltage capacitors the suitable bridge is
A:
Wien bridge
B:
modified De Sauty bridge
C:
Schering bridge
D:
either (a) or (b)
Answer: C
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