25 Basic Electrical Engineering questions and Answer 2024-Electronicsinfos

Basic Electrical Engineering Q&A 2024

What is the purpose of a Shunt? 

A shunt is a low-value resistance used to expand the range of dc ampere meters.

what is the material used in the shunt?

we used Manganin alloy and constanton.

Write four properties of Shunt Material?

• The temperature coefficient must be low
• Thermal electric emf must be low produced in the material.
• The resistance of shunt material does not change with time.
• The current carrying capacity must be high.
  

what is the use of a multiplier?

A multiplier expands the range of DC volt meters connected in the series of volt meters.

write 3 material names which are used in multipliers?

• Manganin
• Constanton
• Nichrome

what is the power rating of the multiplier?

The power rating of the multiplier is between 1 - 5 watts.

which method is used to measure high-value resistance?

To measure the high-value resistance we used a mega ohm meter, bridge mager, loss of charge method etc

What is a classification of resistance?

• Low-value resistance
• Medium value resistance
• High-value Resistance

What is the difference between a Series and shunt-type ohm meter?

Series ohm meter

• A series ohm meter is used to measure the high-value resistance.
• we do not need an on-off switch in the series ohm circuit.
• in the series of ohm meters, we connect unknown resistance in a series of ohm meters to measure the value.

Shunt ohm meter

• A shunt ohm meter is used to measure the low-value resistance.
• we need an on-off switch in the shunt ohm circuit.
• in the shunt ohm meters, we connect unknown resistance in a parallel of ohm meters to measure the value

What is the Principle of the Ohm Meter?

The Principle of the ohm meter is defined as how much voltage and current are passed to the circuit so we can measure resistance with the help of the ohm law.

write the parts of Mager?

There are different parts of mager are

• Test terminals 'E' and 'L'

• handle

• dial and pointer

• body or case

What is a Mager?

A mager is a portable instrument that is used to measure the high value of resistance.

What is a Kelvin Double Bridge?

Kelvin double bridge is a customized form of weight stone bridge which is used to measure the low value of resistance.

what is the function of the Blaywere or Earth loop test?

Both test methods are used to measure the ground fault location if we do not have the same cable.

write three errors in energy meters?

1. creeping error
2. temperature error
3. speed error

Write a different name for the energy meter test?

• low power factor test
• creep test
• starting test
• Artificial loading test

what are the types of Maximum Demand indicators (MDI)?

Different MDIs are 

• Bi-Metal type MDI
• Murze-prize MDI
• Waisting house watt over MDI
• Solid state MDI

What are 3 basic electrical quantities?

The basic quantities are 

• Current

• Voltage

• Resistance

What is the basic electrical formula?

What is the formula for 3-phase power?

The three-phase power formula is

kW = (V × I × PF× 1.732)

What skills are needed to be an electrical engineer?

• Active learning Skill
• Interpersonal skills.
• Organizational skills
• Innovative thinking
• communication skills 
• Soft Skills
• software Skills

Write Two instrument transformer names?

There are two instrument transformer names is
C.T = current transformer
P.T = potential transformer

What is the Error that occurs in C.T?

• Phase angle error
• ratio error 

What is a C.T.?

A C.T. is an instrument that is used to measure the high-value currents in the circuit.

What is a P.T.?

A P.T. is an instrument that is used to measure the high-value voltage in the circuit.

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