MCQs on Measurement Part-13

Measurement MCQs

1. In d.c. potentiometer measurements, a second reading is often taken after reversing the polarities of the d.c. supply and the unknown voltage, and the average of the two readings is taken. This is with a view to eliminate the effect of_______.

a. Erroneous standardisation

b. Stray thermal emf’s

c. Stray magnetic fields

d. Ripples in the d.c. supply

 

2. In an analog data acquisition unit, what is the correct sequence of the blocks starting from the input?

a. Signal conditioner-Recorder-Transducer

b. Signal conditioner-Transducer-Recorder

c. Transducer-Signal conditioner- Recorder

d. Transducer-Recorder-Signal conditioner

 

3. Which of the following is not true regarding a flux meter?

a. The flux meter is more sensitive and accurate than the ballistic galvanometer

b. The air friction damping is negligible

c. There is no control springs

d. The industrial form of flux meter is portable

 

4. A distortion analyser measures the total_____.

a. dc power

b. peak power

c. rms power

d. average power

 

5. A spectrum analyser is used to display______.

a. Phase

b. Time

c. Amplitude

d. Frequency band spectrum

 

6. Q-factor is used to measure_______.

a. Resistance

b. Power

c. Inductance

d. Voltage

 

7. Q-factor is defined as________.

a. Reactance / Resistance

b. Resistance / Reactance

c. Resistance / Impedance

d. Impedance / Resistance

 

8. A frequency meter is used to measure_______.

a. Ratio

b. Frequency

c. Time interval

d. Phase

 

9. Schmitt trigger used in digital measurements time converts input to______.

a. Pulses

b. Sine wave

c. Sawtooth wave

d. Square wave

 

10. In an unshunted fluxmeter, the sensitivity is dependent upon________.

a. Resistance of neither the moving coil nor the search coil

b. Resistance of both the moving coil and the search coil

c. Resistance of the search coil

d. Resistance of moving coil

 

11. In reed type frequency meter, all the reeds________.

a. Have different natural frequencies, but the difference in natural frequencies of adjacent reeds is +/- 0.5 Hz

b. Have same natural frequency

c. Have different natural frequency

d. None of the above

 

12. In signal generators_____.

a. Energy is converted from a simple d.c. source into a.c. energy at some specific frequency

b. Energy is generated

c. Energy is created

d. All of the above

 

13. Fluxmeter is a special type of ballistic galvanometer having_______.

a. Very small electromagnetic damping and control torque

b. Very small electromagnetic damping and very high control torque

c. Very high electromagnetic damping and very small control torque

d. Very high electromagnetic damping control torque

 

14. Harmonic distortion percentage is accurately measured by______.

a. VTVM

b. Harmonic distortion analyser

c. CRO

d. VOM