Electrical and Electronics Measurements and Instrumentation Online Test 1 – Randomized MCQs

With each visit of this Electrical and Electronics Measurements and Instrumentation online Quiz / Practice Test, the list of MCQs / Objective Questions presented will be different, offering you a diverse set of practice opportunities. This variability encourages you to practice extensively, refining the accuracy of your answers and your overall grasp of the content. By utilizing this resource, you can hone your skills and become more adept at managing time constraints during actual exams.

Test Instructions
Question type	Randomized MCQs.Changes every time you visit the test
Total Number of Questions	30
Time Limit	20 Minutes
Points	1 Point for each Question

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Question 1 of 30

Q-1.LVDT can be used for

angular velocity measurement of a column

load measurement

vibration measurement

force measurement in a beam

Your Answer:Correct

Your Answer:Incorrect

Question 2 of 30

Q-2.In an Epstein square, used for finding the iron loss in a stack of laminations, the laminations are so arranged that

Plane of each lamination is perpendicular to the plane of the square

Plane of each lamination is parallel to the plane of square

The plane of laminations may be either parallel or perpendicular to the plane of the square

The plane of laminations may be at any angle to the plane of square.

Your Answer:Correct

Your Answer:Incorrect

Question 3 of 30

Q-3.The symbole nm stands for :

newton metre

nano metre

nano milli

number of moles.

Your Answer:Correct

Your Answer:Incorrect

Question 4 of 30

Q-4.F.M systems as compared to A.M systems

Are equally affected by noise

Are less affected by noise

Are more affected by noise

Are highly affected by noise sense they operate at VHF and UHF.

Your Answer:Correct

Your Answer:Incorrect

Question 5 of 30

Q-5.When measuring power in a circuit with high current

current coil should be connected to the load side

pressure coil should be connected to the load side

pressure coil should be connected to the source side

the placement of pressure and current coils are immaterial

Your Answer:Correct

Your Answer:Incorrect

Question 6 of 30

Q-6.The sensitivity factor of strain gauge is normally of the order of

1 to 1.5

1.5 to 2.0

0.5 to 1

5 to 10

Your Answer:Correct

Your Answer:Incorrect

Question 7 of 30

Q-7.Printing mechanism of a FAX machine is of

thermal type

impact type

electrostatic type

optical type

Your Answer:Correct

Your Answer:Incorrect

Question 8 of 30

Q-8.Water is flowing with a depth of 0.9 m over a rectangular notch 1.2 m wide. Find the depth of flow over a right angle notch if the same were to pass over it. Assume that both the notches have the same co-efficient of discharge

0.91 n

1.1 m

2.2 m

0.45 m.

Your Answer:Correct

Your Answer:Incorrect

Question 9 of 30

Q-9.The Gaussian distribution can be mathematically expressed as:

y = (h/√π) e(h²x²)

y = - (h/√π) e(h²x²)

y = (h/π) e(-h²x²)

y = (h/√π) e(-h²x²)

Your Answer:Correct

Your Answer:Incorrect

Question 10 of 30

Q-10.An oscilloscope has an input capacitance of 50 pF and a resistance of 2 MΩ and the voltage divider ratio of 10. The parameter of high impedance probe are

C₁ = 5.55pF, R₁ = 18 MΩ

C₁ = 3.33pF, R₁ = 9 MΩ

C₁ = 11.1pF, R₁ = 18 MΩ

C₁ = 5.55pF, R₁ = 9 MΩ

Your Answer:Correct

Your Answer:Incorrect

Question 11 of 30

Q-11.In a measurement system if a q₁ is an across variable and its associated through variable is q₂(Power based), the static impedance of the system is :

q₁×q₂

q_{1 /} q₂

q_{2 /}q₁

q₁^{2 /}q₂

Your Answer:Correct

Your Answer:Incorrect

Question 12 of 30

Q-12.Time scale of a strip chart recorder is controlled by

controlling speed of the chart paper

controlling the stylus drive mechanism

controlling the range selector

controlling the stylus

Your Answer:Correct

Your Answer:Incorrect

Question 13 of 30

Q-13.Why are multimeters provided with separate scale for low a.c voltages?

To improve the readability of the scale.

To have high accuracy

d. None of the above.

Your Answer:Correct

Your Answer:Incorrect

Question 14 of 30

Q-14.The power factor in a single phase circuit is cosΦ = P / VI, where P is the power read by a wattmeter, V is the voltage read by voltmeter and I is the current read by an ammeter. All the three instruments have a limiting error of ±1%. The power factor of the circuits can be known if only one meter i.e an electrodynamometer type power factor having a limiting error ±1% used. The preferred method is to use single instrument like a power factor rather than using 3 instruments because the error with using wattmeter, voltmeter and ammeter is

±2%

±3%

±1%

-1%

Your Answer:Correct

Your Answer:Incorrect

Question 15 of 30

Q-15.A moving iron voltmeter reads low for a.c voltages than for corresponding values of d.c voltages. The meter can made to read equally for both a.c and d.c voltages

If the resistance of the multiplier is made very high

If the inductance of coil is made small

If the resistance of the coil is made very large

If the multiplier resistance is shunted by a capacitor of appropriate value to make the circuit non-inductive.

Your Answer:Correct

Your Answer:Incorrect

Question 16 of 30

Q-16.Which instrument has the highest frequency range with accuracy within reasonable limits?

PMMC

Moving iron

Electrodynamometer

Rectifier

Your Answer:Correct

Your Answer:Incorrect

Question 17 of 30

Q-17.A spring produces a controlling torque of 16x10^-6 Nm for a deflection of 120Y. If the width and length become two times their original values and the thickness is halved, the value of controlling torque for the same deflection will be

16 × 10^-6 N

8x10^-6 Nm

2x10^-6 Nm

32x10^-6 Nm

Your Answer:Correct

Your Answer:Incorrect

Question 18 of 30

Q-18.If the temperature of a radiating body is 1500°C, the wavelength at which the maximum radiant energy occurs:

2.8 µm

1.63 µm

1 µm

20.8 µm

Your Answer:Correct

Your Answer:Incorrect

Question 19 of 30

Q-19.In an amplitude modulated system, the total power radiated 600 W. the power of the carrier is 400 W. what is modulation index?

0.5

0.75

None of the above.

Your Answer:Correct

Your Answer:Incorrect

Question 20 of 30

Q-20.A photomultiplier tube uses 10 stages. The sensitivity of each dynode of the tube is 100 µA / lm, the overall sensitivity of the photo-multiplier tube, if the gain of each stage is 2.7, is approximately :

2.06 A/lm

270 µA / lm

2700 µA / lm

None of the above.

Your Answer:Correct

Your Answer:Incorrect

Question 21 of 30

Q-21.The advantage of Hay’s bridge over Maxwell’s inductance–capacitance bridge is that

its final balance equations are independent of frequency

it reduces cost by not making capacitor or inductor as the variable parameters

it can be used measuring low Q inductors

it can be used measuring high Q inductors

Your Answer:Correct

Your Answer:Incorrect

Question 22 of 30

Q-22.Metal spools cannot be used for resistors meant for a.c applications because:

Hysteresis losses are produced in them

Hysteresis and eddy current losses are produced in them

They produced different expansion leading to stresses in resistance wire

Their use results in poor heat dissipation.

Your Answer:Correct

Your Answer:Incorrect

Question 23 of 30

Q-23.Turns compensation is used in current transformer primarily for reduction of :

Phase angle error

Both ratio and phase angle errors

Ratio error,reduction in phase angle error is incidental

None of the above.

Your Answer:Correct

Your Answer:Incorrect

Question 24 of 30

Q-24.In 2-wattmeter method for measurement of power in a star-connected 3 phase load, magnitude of the two wattmeter readings will be equal

at zero power factor

at unity power factor

at 0.5 power factor

readings of the two wattmeters will never be equal

Your Answer:Correct

Your Answer:Incorrect

Question 25 of 30

Q-25.An ideal OPAMP has a gain of – 100. The input is connected to inverting end and the input resistance is 1 KΩ. The feedback resistance is ,

100 KΩ

10 Ω

100 Ω

1000 KΩ

Your Answer:Correct

Your Answer:Incorrect

Question 26 of 30

Q-26.The resistance value of thermistor is 5000Ω at 25°C and its resistance temperature co-efficient is 0.04/°C. A measurement with a lead resistance of 10 Ω will cause an error of

0.02°C

0.05°C

0.1°C

None of the above.

Your Answer:Correct

Your Answer:Incorrect

Question 27 of 30

Q-27.Maxwell’s bridge can be used for measurement of inductance with

high Q factors

very low Q factors

medium Q factors

wide range of Q factor variations

Your Answer:Correct

Your Answer:Incorrect

Question 28 of 30

Q-28.In an electrodynamometer type of wattmeter :

The current coil is made fixed

The pressure coil is fixed

Any of the two coil i.e current coil or pressure coil can be made fixed

Both the coil should be movable

Your Answer:Correct

Your Answer:Incorrect

Question 29 of 30

Q-29.Consider the following statements.A dc potentiometer is the best means available for the measurement of dc voltage because

The precision in measurement is independent of the type of detector used
It is based on null balance technique
It is possible to standardize before a measurement is undertaken
It is possible to measure dc voltages ranging in value from mV to hundreds of volts Of these statements,

2 and 3 are correct

1 and 4 are correct

2 and 4 are correct

3 and 4 are correct

Your Answer:Correct

Your Answer:Incorrect

Question 30 of 30

Q-30.The advantage of Anderson’s bridge over Maxwell’s bridge is that

its final balance equations are independent of inductor losses

it reduces cost by not making capacitor or inductor as the variable parameters

number of bridge components required are less

attaining balance condition is easier and less time consuming

Your Answer:Correct

Your Answer:Incorrect

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Electrical and Electronics Measurements and Instrumentation Online Test 1 – Randomized MCQs

Electrical and Electronics Measurements and Instrumentation Online Test 1 – Randomized MCQs

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