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Test: Electrical & Electronic Measurements- 2 - Electrical Engineering (EE) MCQ


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20 Questions MCQ Test Electrical Engineering SSC JE (Technical) - Test: Electrical & Electronic Measurements- 2

Test: Electrical & Electronic Measurements- 2 for Electrical Engineering (EE) 2024 is part of Electrical Engineering SSC JE (Technical) preparation. The Test: Electrical & Electronic Measurements- 2 questions and answers have been prepared according to the Electrical Engineering (EE) exam syllabus.The Test: Electrical & Electronic Measurements- 2 MCQs are made for Electrical Engineering (EE) 2024 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests for Test: Electrical & Electronic Measurements- 2 below.
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Test: Electrical & Electronic Measurements- 2 - Question 1

In which of the following do the measurements find their application? 

i. Automatic control of processes &operations

ii. Engineering experimental analysis

iii. Monitoring of processes and operations

Detailed Solution for Test: Electrical & Electronic Measurements- 2 - Question 1

In automatic control of processes and operations, measurement is required to control and provide the desired response

In engineering experimental analysis, measurement is required to find out the response of system to inputs

To monitor a system or process we need measurement

Test: Electrical & Electronic Measurements- 2 - Question 2

Induction Type Instruments can be employed for ________.

Detailed Solution for Test: Electrical & Electronic Measurements- 2 - Question 2

Induction type of instruments ae used to measure AC quantities only. We can use these instruments as an ammeter, voltmeter, wattmeter and an energy meter.

Test: Electrical & Electronic Measurements- 2 - Question 3

The ratio of output change for a given measuring system is referred to as

Detailed Solution for Test: Electrical & Electronic Measurements- 2 - Question 3

Sensitivity: It is the change in output to the unit change in input

Linearity:The property of an instrument, if output varies linearly according to input is known as linearity. It is the ability to produce the input characteristics symmetrically and linearly. The graphical relationship between input and output is a straight line. It is also a supporting characteristic of accuracy.

Test: Electrical & Electronic Measurements- 2 - Question 4

That would be the sensitivity of an ammeter, which requires a change of 3A in its coil to produce a change in deflection of the pointer by 6 mm?

Detailed Solution for Test: Electrical & Electronic Measurements- 2 - Question 4

Sensitivity: It is the change in output to the unit change in input

Change in the output = 6 mm

Change in input = 3 A

Sensitivity (S) = 6/3 = 2 mm/A

Test: Electrical & Electronic Measurements- 2 - Question 5

Which one of the following force is not needed for the satisfactory operation of any indicating (or measuring) instrument?

Detailed Solution for Test: Electrical & Electronic Measurements- 2 - Question 5

In measuring instruments, the effect of unknown quantity is converted into a mechanical force which is transmitted to the pointer, which indicates on a scale. This moving system has to satisfy following requirements.

(1) Mechanism for producing deflecting torque

(2) Mechanism for producing controlling torque

(3) Mechanism for producing damping torque

Hence gravitational force is not needed for the satisfactory operation of any indicated instrument.

Test: Electrical & Electronic Measurements- 2 - Question 6

A spring controlled moving iron voltmeter draws a current of 1 mA for full scale value of 100 V. If it draws a current of 0.5 mA, the meter reading is:

Detailed Solution for Test: Electrical & Electronic Measurements- 2 - Question 6

For moving iron voltmeter,

Deflection (θ) is directly proportional to square of the current

Given that,

Test: Electrical & Electronic Measurements- 2 - Question 7

Deflection produced in Moving iron instruments is:

Detailed Solution for Test: Electrical & Electronic Measurements- 2 - Question 7

The deflection in Moving iron instrument is given by,

Deflection is directly proportional to square of rms value of operating current

Test: Electrical & Electronic Measurements- 2 - Question 8

A standard cell of 1.0185 V is used with a slide wire potentiometer. The balance was obtained at 60 cm. When an unknown emf was connected, the balance was obtained at 82 cm. What is the magnitude of unknownemf?

Detailed Solution for Test: Electrical & Electronic Measurements- 2 - Question 8

Given that,

Standard voltage Es = 1.0185V

The balance obtained at 60 cm.

Resistance Rs = 60Ω

Working current 

Voltage corresponding to 82 cm,

V = 0.0169 × 82 = 1.39V =

Test: Electrical & Electronic Measurements- 2 - Question 9

The type of wattmeter commonly used for measurement of power in AC circuits is:

Detailed Solution for Test: Electrical & Electronic Measurements- 2 - Question 9

Dynamometer type instrument as wattmeter is used for the measurement of power in AC circuits

Moving iron type, rectifier type and thermocouple type instruments are mostly used as ammeter or voltmeter

Test: Electrical & Electronic Measurements- 2 - Question 10

According to Blondel’s theorem, if a network is supplied using ‘n’ conductor’s the total power is ________ of the reading of n wattmeter’s so arranged that a current coil of each wattmeter is in each line and the corresponding pressure coil is connected between that line and a common point

Detailed Solution for Test: Electrical & Electronic Measurements- 2 - Question 10

According to Blondel’s theorem the number of wattmeters to be required to measure the total power in n-phase system is either N or(N-1).

When separate neutral wire is available in the system the no. of watt meters to be required is N.

When the neutral wire is not available in the system, then the no. of watt meters to be required is (N-1). One line is acts as a common line for return path.

The total power is the sum of the all wattmeter readings.

Test: Electrical & Electronic Measurements- 2 - Question 11

The disc of domestic supply energy meter is made of which material?

Detailed Solution for Test: Electrical & Electronic Measurements- 2 - Question 11

The disc of domestic supply energy meter is made of aluminium.

Energy meter consists of rotating aluminium disc mounted on a spindle between two electro magnets.

Test: Electrical & Electronic Measurements- 2 - Question 12

In a single phase induction type energy meter, the deflecting torque is________the true power in the circuit.

Detailed Solution for Test: Electrical & Electronic Measurements- 2 - Question 12

In a single phase induction type energy meter, the deflecting torque is directly proportional to the true power in the circuit.

Test: Electrical & Electronic Measurements- 2 - Question 13

The dead time of an instrument refers to _____.

Detailed Solution for Test: Electrical & Electronic Measurements- 2 - Question 13

Dead Time: It is the time before the instrument begins to response after the quantity has altered

Dead Space (or) Dead Zone: In some instruments, for some range of input values, there is no change in output. This range of input is called dead space (or) dead zone.

Test: Electrical & Electronic Measurements- 2 - Question 14

A piezometer is used to measure:

Detailed Solution for Test: Electrical & Electronic Measurements- 2 - Question 14

A piezometer is a device used to measure liquid pressure in a system by measuring the height to which a column of the liquid rises against gravity. It is used to measure very low pressures.

Test: Electrical & Electronic Measurements- 2 - Question 15

The potentiometer wires should have _______:

Detailed Solution for Test: Electrical & Electronic Measurements- 2 - Question 15

The potentiometer wires should have high resistivity (specific resistance) and low temperature coefficient. The alloys constantan and manganin are traditionally used for this purpose.

Test: Electrical & Electronic Measurements- 2 - Question 16

The vertical gain control of CRO is set at a deflection factor of 5 V/cm. An unknown sinusoidal is applied to Y-input. A 20 cm long straight line trace is observed, what will the ac voltage be?

Detailed Solution for Test: Electrical & Electronic Measurements- 2 - Question 16

Deflection sensitivity is defined as,

Deflection factor is the reciprocal of deflection sensitivity.

Test: Electrical & Electronic Measurements- 2 - Question 17

Which meter is suitable for the measurement of 10 mV at 50 MHz?

Detailed Solution for Test: Electrical & Electronic Measurements- 2 - Question 17

CRO is used to measure the quantities at higher frequencies. Hence CRO is suitable for the measurement of 10 mV at 50 MHz.

Test: Electrical & Electronic Measurements- 2 - Question 18

Which of the following is not suitable for the measurement of low resistances?

Detailed Solution for Test: Electrical & Electronic Measurements- 2 - Question 18

Kelvin’s double bridge is used for the measurement of very low resistances. Using potentiometer method and Ammeter Voltmeter method we can measure low resistance.

Wheatstone bridge is suitable for the measurement of medium resistance

Test: Electrical & Electronic Measurements- 2 - Question 19

Which is the most suitable thermocouple transducer for the measurement of temperature in the range of 1300°C to 1500°C?

Detailed Solution for Test: Electrical & Electronic Measurements- 2 - Question 19

Test: Electrical & Electronic Measurements- 2 - Question 20

Capacitive transducers are normally used for:

Detailed Solution for Test: Electrical & Electronic Measurements- 2 - Question 20

Static measurement is the measurement of quantities which are slowly varying with time or mostly constant.

Dynamic measurement is the measurement of quantities which changes rapidly with time.

Capacitive transducers are used for dynamic measurements, used for measuring the displacement, pressure and other physical quantities.

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