MEASUREMENT AND INSTRUMENTATION QUIZ

A sinusoidal signal waveform, when observed on an oscilloscope, has a peak to peak amplitude of 6 cm. If the vertical sensitivity setting is 5 v/cm, then rms value of the voltage will be

10.6 V.

12.6 V.

15 V.

11.1 V.

TRUE ANSWER : ?
YOUR ANSWER : ?

A DC potentiometer is the best means available for the measurement of DC voltage because

It is based on null balance technique.

The precision in measurment is independent of the type of the defector used.

It is possible to standardize before a measurement is undertaken.

None of above.

TRUE ANSWER : ?
YOUR ANSWER : ?

When the pointer of an indicating instrument comes to rest in the final deflected position, ______

None of the listed here

Only deflecting torque acts

Only controlling torque acts

Both deflecting and controlling torques act

TRUE ANSWER : ?
YOUR ANSWER : ?

A dynamometer wattmeter can be used for

Both DC and AC

DC only

AC only

Any of the listed here

TRUE ANSWER : ?
YOUR ANSWER : ?

The rectifier instrument is not free from

All of the listed here

Wave shape error

Frequency error

Temperature error

TRUE ANSWER : ?
YOUR ANSWER : ?

In a megger controlling torque is provided by

Coil

Eddy current

Gravity

Spring

TRUE ANSWER : ?
YOUR ANSWER : ?

How many fundamental units are there ?

6

4

7

8

TRUE ANSWER : ?
YOUR ANSWER : ?

The pointer of an indicating instrument is generally made of _______

Copper

Aluminium

Soft steel

Silver

TRUE ANSWER : ?
YOUR ANSWER : ?

The use of thermocouple meters for AC measurement leads to scale which is

square law.

linear.

expontial.

logarithmic.

TRUE ANSWER : ?
YOUR ANSWER : ?

To increase Q factor of a coil, the wire should be

long and thin.

thin.

long.

thick.

TRUE ANSWER : ?
YOUR ANSWER : ?