Measurement system

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