page 2 | Electrical Measurement and Instrumentation MCQ

Q21. Hay's bridge is suitable for the measurment of ________ .

capacitance with low dissipating factors

capacitance with high dissipating factors

inductance with \(Q<10\)

indutance with \(Q>10\)

Q22. In the circuit diagram of a Schering bridge shown in Figure, at balance condition, the unknown capacitance \( C_u \) and its equivalent series resistance \( R_u \) are given as_________.

\( C_u = \frac{R_2}{C_1} R1, R_u = \frac{C_1}{R_2} C3 \)

\( C_u = \frac{R_2}{C_3} R_1, R_u = R_2 \frac{C_3}{C_1} \)

\( C_u = \frac{C_1}{C_3}, R_u = \frac{R_2}{R_1} \)

\( C_u = C_3 \frac{R_1}{R_2}, R_u = R_2 \frac{C_1}{C_3} \)

Q23. Which is more suitable to measure the perfect capacitor?

Owen’s bridge

Anderson’s bridge

De-Sauty’s bridge

Hay’s bridge

Q24. In strain gauge torque transducer the strain gauge should be mounted at

\(0^\circ\) to the shaft axis

\(45^\circ\) to the shaft axis

\(90^\circ\) to the shaft axis

\(60^\circ\) to the shaft axis

Q25. A thermistor is inherently suitable for temperature measurement involving

high span and low sensitivity

low span and high sensitivity

high span and high sensitivity

low span and low sensitivity

Q26. The principle of operation of LVDT is based on variation of

Self inductance

Mutual inductance

Reluctance

Permeance

Q27. For which one of the following material, is the Hall Coefficient zero?

Intrinsic semiconductor

Metal

Insulator

Alloy

Q28. Piezoelectric transducers are

passive transducers

active transducers

inverse transducers

both (B) and (C)

Q29. Which of the following is a passive transducer?

Thermistor

Thermocouple

Photo voltaic transducer

Piezoelectric transducer

Q30. Hysteresis in an instrument means

The repeatability of the instrument

The reliability of the instrument

The change in the same reading when the input is first increased and then decreased.

The inaccuracy due to change in temperature

MCQ

MEASUREMENT & INSTRUMENTATION