Measurement MCQs Part-7

Measurement MCQs

1. Anderson's bridge is used to measure unknown________.

a. Capacitance

b. Resistance

c. Frequency

d. Inductance

 

2. Hay's bridge is used to measure an inductance of _________.

a. Low Q

b. Very high Q

c. Medium Q

d. High Q

 

3. To measure precise inductance from a few μH to several henries, which of the following bridge is used?

a. Anderson bridge

b. Maxwell's bridge

c. Maxwell-wien bridge

d. Hay's bridge

 

4. Wagner's ground is used to________.

a. Measure inductance

b. Measure resistance

c. Measure capacitance

d. Eliminate earth from the bridge network capacitance

 

5. Assertion (A) : The wien's bridge may be difficult to balance unless the waveform of the applied voltage is sinusoidal.

Reason (R) : Wien bridge is frequency sensitive.

(a) A is true but R is false.

(b) A is false but R is false.

(c) Both A and R are true, and R is a correct explanation of A.

(d) Both A and R are true, but R is not a correct explanation of A.

 

6. Hay bridge is a modification of________.

a. Maxwell's bridge

b. De-sauty's bridge

c. Anderson's bridge

d. None of the above

 

7. In wien bridge, the output frequency is determined by_______.

a. R-L-L combination

b. R-L-C combination

c. R-C combination

d. R-L combination

 

8. De-sauty bridge is used for the measurement of________.

a. dissipation factor and capacitance

b. Power factor and quality factor

c. Power factor and dissipation factor

d. Capacitance and power factor

 

9. The shielding of bridge elements is done to reduce the effects of_______.

a. External magnetic field

b. Leakage current

c. Stray capacitance

d. Distributed capacitance

 

10. Vibration galvanometer is tuned_______.

a. By changing the length and tension of vibrating coil

b. By attaching weight to the vibrating coil

c. By changing its damping constant

d. All of the above

 

11. Wagner earth devices in AC bridge circuits are used for_______.

a. Eliminating all the node to earth capacitances

b. Minimizing the effect of inter-component capacitance

c. Eliminating the effect of stray capacitance

d. Shielding all the bridge elements from external magnetic field

 

12.  A PMMC uses a________.

a. Moving iron type

b. Electrodynamometer

c. Moving coil

d. Taut bond

 

13. A moving iron movement uses______.

a. Moving coil

b. Ribbon

c. Electrodynamometer

d. Radial vane

 

14. Which of the following is not a desired characteristic of shunts used in PMMC instruments?

a. It should carry the current without excessive temperature rise.

b. It should have a low thermal emf.

c. It must be manufactured using manganin or copper

d. The resistance of the shunt should not vary with time.

 

15. To select the range, a multirange ammeter uses a______.

a. Make before break type switch

b. Simple switch

c. Single pole double throw switch

d. Double pole double throw switch