It is required to measure angular position. Out of the transducers Circular pote

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Question
It is required to measure angular position. Out of the transducers
1. Circular potentiometer
2. LVDT
3. E pick up
4. Synchro
The proper devices are
Options
A. 1, 2, 3, 4
B. 2 and 3
C. 1, 2, 4
D. 1 and 4

Correct Answer

1 and 4

Explanation

LVDT and E pickup are suitable for linear displacement.

Measurements and Instrumentation problems

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1. A digital voltmeter has a read out range from 0 to 999 counts. If the full scale reading is 9.999 V, the resolution is
Options
A. 1 V
B. 0.01 V
C. 1 mV
D. 1 ?V

2. The speed transducer using a drag cup rotor has the main advantage of
Options
A. very high accuracy
B. low energy requirement
C. cheap construction
D. all of the above

3. Two resistors R₁ = 36 ? � 5% and R₂ = 75 ? � 5% are connected in series. The total resistance is
Options
A. 111 � 0 ?
B. 111 � 2.778 ?
C. 111 � 5.55 ?
D. 111 � 7.23 ?

4. Figure shows an RC potentiometer to measure ac voltage. It is desired that V₀/V_i should be independent of frequency. The value of C should be
Options
A. 10 ?F
B. 11 ?F
C. 0.1 ?F
D. 0.09 ?F

5. Which of the following are needed both for protection and metering?
Options
A. Wattmeters
B. Instrument transformers
C. Energy meters
D. Power factor meters

6. A moving coil instrument has a resistance of 0.6 ? and full scale deflection at 0.1 A. To convert it into an ammeter of 0-15 A range, the resistance of shunt should be
Options
A. 0.6 ?
B. 0.06 ?
C. 0.1 ?
D. 0.004 ?

7. Assertion (A): De sauty's bridge is suitable only for pure capacitor.
Reason (R): Capacitors are mostly perfect.
Options
A. Both A and R are true and R is correct explanation of A
B. Both A and R are true but R is not correct explanation of A
C. A is true R is false
D. A is false R is true

8. In figure, Z₁ = 200?60� ?, Z₂ = 400? - 90� ?, Z₃ = 300?0�. Then Z₄ for bridge to be balanced is
Options
A. 150?30� ?
B. 400? - 90� ?
C. 300?90� ?
D. 600? - 150� ?

9. A moving coil instrument has a resistance of 0.5 ? and a full scale deflection of 0.1 A. To convert it into an ammeter of 0-10 A the shunt resistance should be
Options
A. 0.004 ?
B. 0.005 ?
C. 0.05 ?
D. 0.1 ?

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