Exercise: Measurements And Instrumentation

Questions for: Measurements And Instrumentation

For measuring a very high resistance we should use
A:
Kelvin's double bridge
B:
Wheatstone bridge
C:
Meggar
D:
Either (a) or (c)
Answer: C
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In indicating instruments the controlling torque is provided by a spring.
A:
True
B:
False
C:
D:
Answer: A
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In air friction damping
A:
the air pressure opposes the motion of piston when it is moving inwards
B:
the air pressure opposes the motion of piston when it is moving outwards
C:
the air pressure opposes the motion of piston both when it is moving inwards as well as outwards
D:
the air pressure may oppose or aid the motion of piston depending on the design
Answer: C
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The difference between measured value and true value is called
A:
gross error
B:
relative error
C:
probable error
D:
absolute error
Answer: D
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In measuring resistance using voltmeter and ammeter, the resistances of voltmeter and ammeter also affect the accuracy of measurement.
A:
True
B:
False
C:
D:
Answer: A
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