MEASUREMENT AND INSTRUMENTATION QUIZ

Resolution of an instrument is

the maximum quantity it can measure.

ability to distinguish polarity.

the maximum non linearity.

the minimum quantity it can measure.

TRUE ANSWER : ?
YOUR ANSWER : ?

Assertion(A): A low power factor wattmeter has special constructional features to ensure accurate measurment. Reason(R): Extension of wattmeter range in DC circuit can be easily done by using current and potential transformer

A is false R is true.

Both A and R is true and R is correct explanation of A C.

Both A and R is true and R is not correct explanation of A.

A is true R is false.

TRUE ANSWER : ?
YOUR ANSWER : ?

A DC potentiometer is designed to measure up to about 2V with a slide wire of 800 mm. A standard cell of emf 1.18 V obtains balances at 600 mm. A test cell is seen to obtain balance at 680 mm. The emf of test cell is

1.7 V.

1.5 V.

1 V.

1.34 V.

TRUE ANSWER : ?
YOUR ANSWER : ?

The rectifier instrument is not free from

All of the listed here

Wave shape error

Temperature error

Frequency error

TRUE ANSWER : ?
YOUR ANSWER : ?

In the bridge given in the figure, the reading of the high impedance voltmeter is

- 3.33 V.

Zero.

6.66 V.

4.20 V.

TRUE ANSWER : ?
YOUR ANSWER : ?

Ratio of readings of two wattmeter connected to measure power in a balanced 3-phase load is 5:3 and the load is inductive. The power factor at load is

0.917 lead.

0.6 lag.

0.917 lag.

0.6 lead.

TRUE ANSWER : ?
YOUR ANSWER : ?

Attraction and repulsion type instruments are the two different types of which instrument ?

Multipliers.

Induction type.

Moving iron type.

Dynamo-meter type.

TRUE ANSWER : ?
YOUR ANSWER : ?

Assertion (A): A hot wire ammeter has a cramped scale. Reason (R): The heat is proportional to square of current.

Both A and R are true and R is not correct explanation of A.

Both A and R are true and R is correct explanation of A.

A is false and R is ture.

A is ture and R is false.

TRUE ANSWER : ?
YOUR ANSWER : ?

______ movement is most expensive.

None of the listed here

Moving iron

Dynamometer

D'Arsonval movement

TRUE ANSWER : ?
YOUR ANSWER : ?

A current of is measured with a thermocouple, 5 A full scale meter. What is the meter reading?

4.06 A.

5 A.

2.03 A.

6.09 A.

TRUE ANSWER : ?
YOUR ANSWER : ?