Measurement And Instrumentation MCQ Questions & Answers

51.
The full-scale deflection current of an ammeter is 1 mA and its internal resistance is 100 ohms. This is to have full deflection when 100V is measured. What is the value of series resistor to be used?

A. 99.99 K ohms

B. 100 K ohms

C. 99.99 ohms

D. 100 ohms

Answer & Solution Discuss in Board Save for Later

52.
A spring controlled indicating instrument has a deflection of 90° for maximum current I. The corresponding deflection for a gravity controlled instrument is

A. 90°

B. 120°

C. 30°

D. 0°

Answer & Solution Discuss in Board Save for Later

53.
PMMC type instruments normally use

A. Air friction damping

B. Fluid friction damping

C. Eddy current damping

D. None of the above

Answer & Solution Discuss in Board Save for Later

54.
Jewels are used in instruments for the purpose of

A. Damping

B. Torque control

C. Suppressing noise

D. Bearing

Answer & Solution Discuss in Board Save for Later

55.
Which instrument has identical calibration for ac as well as dc values?

A. Hot wire type

B. Moving coil type

C. Induction type

D. Moving iron type

Answer & Solution Discuss in Board Save for Later

56.
The full-scale deflection current of an ammeter is 1 mA and its internal resistance is 100 ohms. If this meter is to have full deflection at 5A, what is the value of the shunt resistance to be used?

A. 49.99 ohms

B. $$\frac{1}{{49.99}}{\text{ ohms}}$$

C. 1 ohm

D. 2 ohms

Answer & Solution Discuss in Board Save for Later

57.
If the instrument is to have a wide range, the instrument should have

A. Linear scale

B. Square-law scale

C. Exponential scale

D. Logarithmic scale

Answer & Solution Discuss in Board Save for Later

58.
It can be stated that

A. CT operates at almost the same flux density as a PT

B. CT operates with a higher flux density than PT

C. CT operates with considerably lower flux density than a PT

D. No generalisation can be made with regard to the flux densities in CT and PT

Answer & Solution Discuss in Board Save for Later

59.
To measure an A. C. voltage by using an A.C. potentiometer, it is desirable that the supply for the potentiometer in taken

A. From a source which is not the same as the unknown voltage

B. From a battery

C. From the same source as the unknown voltage

D. Any of the above

Answer & Solution Discuss in Board Save for Later

60.
With a sweep time 10ms across the screen the approx. horizontal sawtooth frequency will be

A. 50Hz

B. 100Hz

C. 1kHz

D. 500Hz

Answer & Solution Discuss in Board Save for Later

Measurement And Instrumentation MCQ Questions & Answers | ECE

51. The full-scale deflection current of an ammeter is 1 mA and its internal resistance is 100 ohms. This is to have full deflection when 100V is measured. What is the value of series resistor to be used?

Answer & Solution

52. A spring controlled indicating instrument has a deflection of 90° for maximum current I. The corresponding deflection for a gravity controlled instrument is

Answer & Solution

53. PMMC type instruments normally use

Answer & Solution

54. Jewels are used in instruments for the purpose of

Answer & Solution

55. Which instrument has identical calibration for ac as well as dc values?

Answer & Solution

56. The full-scale deflection current of an ammeter is 1 mA and its internal resistance is 100 ohms. If this meter is to have full deflection at 5A, what is the value of the shunt resistance to be used?

Answer & Solution

57. If the instrument is to have a wide range, the instrument should have

Answer & Solution

58. It can be stated that

Answer & Solution

59. To measure an A. C. voltage by using an A.C. potentiometer, it is desirable that the supply for the potentiometer in taken

Answer & Solution

60. With a sweep time 10ms across the screen the approx. horizontal sawtooth frequency will be

Answer & Solution

51.
The full-scale deflection current of an ammeter is 1 mA and its internal resistance is 100 ohms. This is to have full deflection when 100V is measured. What is the value of series resistor to be used?

52.
A spring controlled indicating instrument has a deflection of 90° for maximum current I. The corresponding deflection for a gravity controlled instrument is

53.
PMMC type instruments normally use

54.
Jewels are used in instruments for the purpose of

55.
Which instrument has identical calibration for ac as well as dc values?

56.
The full-scale deflection current of an ammeter is 1 mA and its internal resistance is 100 ohms. If this meter is to have full deflection at 5A, what is the value of the shunt resistance to be used?

57.
If the instrument is to have a wide range, the instrument should have

58.
It can be stated that

59.
To measure an A. C. voltage by using an A.C. potentiometer, it is desirable that the supply for the potentiometer in taken

60.
With a sweep time 10ms across the screen the approx. horizontal sawtooth frequency will be