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WorksheetsMeasurement system
Total questions: 15
Worksheet time: 9mins
Which one of the following units is a fundamental unit?
Ampere
Watt
Newton
velocity
What is the standard unit for length ?
Inch
feet
meter
kilometer
What are the SI units of mass, length and time respectively?
g, m and s
kg, cm and s
g, cm and s
kg, m and s
A 0 - 250V voltmeter has a guaranteed accuracy of 2% of full scale reading. What is the percentage of error if it measures 150V?
2%
3.33%
2.5%
5%
Relative error is same as
absolute error
ratio of absolute error and true value
true error
none of the above
The smallest change in measured variable to which instrument will respond is
resolution
accuracy
sensitivity
precision
The errors mainly caused by human mistakes are
instrumental error
Observational error
gross error
systematic error
The measured value of a resistance is 10.25 ohm, whereas its value of 10.22 ohm. What is absolute error of the measurement?
0.01 ohm.
0.03 ohm.
15.36 ohm.
10.26 ohm.
In measurement system, the function of the signal manipulating elements is to
to perform linear operation like addition and multiplication.
to perform non liner operation like clipping filtering, chopping and clamping.
change the magnitude of the input signal while retaining its identity.
change the quantity under measurement to an analogues signal.
A pressure measurement instrument is calibrated between 10 bar and 260 bar. The scale span of the instrument is
250 bar
10 bar
60 bar
50 bar
A moving coil ammeter has a uniform scale with 50 division and gives a full scale reading 10 A. The instrument can read up to (1/5)th of a scale division with a fair degree of certainty. What is the resolution of the instrument in mA?
25 mA.
80 mA.
50 mA.
40 mA.
The resistance of a circuit is found by measuring current flowing and the power fed into the circuit. If the limiting errors in the measurement of power and current are ± 1.5% and ± 1.0% respectively, the limiting error in the measurement of resistance
± 3.5%
± 1%
± 2.5%
± 1.5%
Assertion (A) : Precision is a necessary prerequisiteof accuracy. Reason (R) : Precision guarantees accuracy.
A is true but R is false
A is false bur R is true
Both A and R are true and R is the correct explanation of A
Both A and R are true but R is NOT the correct explanation of A
In a wheatstone bridge, a change of 6 Ω in the unknown arm of bridge is required to produce a change in deflection of 2.4 mm of the galvanometer. The sensitivity is
2.5 mm/Ω
0.8 mm/Ω
0.4 mm/Ω
5.0 mm/Ω
Consider the following statements : In a measuring instrument, 1. Linearity is more important than sensitivity. 2. High precision indicates high accuracy 3. Accuracy cannot be better than resolution. Of these statements
1 and 3 are correct
1 and 2 are correct
1, 2 and 3 are correct
2 and 3 are correct
