BE8254 important questions Basic Electrical and Instrumentation Engineering

BE8254 important questions Basic Electrical and Instrumentation Engineering Regulation 2017 Anna University free download.

BEIE Basic Electrical and Instrumentation Engineering important questions is provided to download for free in pdf.

Subject Name	BASIC ELECTRICAL AND INSTRUMENTATION ENGINEERING
Subject Code	BE8254
Regulation	2017
File	PDF

Sample BE8254 important questions Basic Electrical and Instrumentation Engineering:

Define magnetic reluctance
The opposition offered by the magnetic circuit for the magnetic flux path is known as magnetic reluctance. It is analogous to electric resistance.

Mention some magnetic materials
Alnicos, chromium steels, copper–nickel alloy, nickel, cobalt, tungsten and aluminium. (BE8254 important questions Basic Electrical and Instrumentation Engineering)

Define statically induced emf.
The coil remains stationary with respect to flux, but the flux through it changes with time. The emf induced is known as statically induced emf.

What do you mean by step down transformer?
If the secondary voltage is greater than primary value, the transformer is called step down transformer. (BE8254 important questions Basic Electrical and Instrumentation Engineering)

What are the functions of no-load current in a transformer?
No-load current produces flux and supplies iron loss and copper loss on no-load.

What is the significance of back emf?
In motoring mode, armature induced emf is known as the back emf to stress the fact that it opposes armature emf. It plays the rule of a regulator.

Write the principle of operation of 3 phase induction motor.
Induction motor works on the principle of faraday’s laws of electromagnetic induction. It consists of stator and rotor windings. As these rotor windings or bars rotate within the magnetic field created by the stator magnetizing currents, voltages are induced in them. If the rotor were to stand still, then the induced voltages would be very similar to those induced in the stator windings. (BE8254 important questions Basic Electrical and Instrumentation Engineering)

What is synchronous speed?
The speed at which the stator field rotates is called synchronous speed and it depends upon the frequency of supply and number of poles for which the stator is wound.

Download BE8254 important questions Basic Electrical and Instrumentation Engineering

1st unit BE8254 important questions click here to download

2nd unit BE8254 important questions click here to download

---

3rd unit BE8254 important questions click here to download

---

4th unit BE8254 important questions click here to download

---

5th unit BE8254 important questions click here to download

---

BE8254 important 16 Mark questions Basic Electrical and Instrumentation Engineering

---

BE8254 Syllabus Basic Electrical and Instrumentation Engineering

---

BE8254 Notes Basic Electrical and Instrumentation Engineering

---

BE8254 Question Bank Basic Electrical and Instrumentation Engineering

BE8253 important questions Basic Electrical Electronics and Instrumentation Engineering

BE8253 important questions Basic Electrical Electronics and Instrumentation Engineering for Regulation 2017 Anna University.

The important questions for Basic Electrical Electronics and Instrumentation Engineering.

Subject Name	BASIC ELECTRICAL, ELECTRONICS AND INSTRUMENTATION ENGINEERING
Subject Code	BE8253
Regulation	2017
File	PDF

Sample BE8253 important questions with answers are provided below:

Distinguish between a Branch and a node of a circuit.
A pair of network which connects the various points of the network is
called branch A point at which two or more elements are joined together is called node.

Define line currents and phase currents?
The currents flowing in the lines are called as line currents The currents flowing through phase are called phase currents.

Define line voltage and phase voltage?
The voltage across one phase and neutral is called line voltage & the
voltage between two lines is called phase voltage.

Define open loop control system.
The control system in which the output quantity has no effect upon the input quantity are called open loop control system. This means that the output is not feedback to the input for correction.

Define line voltage and phase voltage?
The voltage across one phase and neutral is called line voltage & the
voltage between two lines is called phase voltage

What is meant by apparent power?
Apparent power is the product of voltage and current and it is not true power. Unit is VA

Define closed loop control system.
The control system in which the output has an effect upon the input
quantity so as to maintain the desired output value are called closed loop control system.

What GSM and CDMA stands for?
Ans. GSM stands for Global system for mobile communication.
CDMA stands for Code division multiple access.

What short notes on DVM?
DVM are measuring instrumen ts that convert analog voltage to signals in to digital or numeric readout.

Download BE8253 important questions Basic Electrical Electronics and Instrumentation Engineering 

1st unit BE8253 important questions click here to download

2nd unit BE8253 important questions click here to download

---

3rd unit BE8253 important questions click here to download

---

4th unit BE8253 important questions click here to download

---

5th unit BE8253 important questions click here to download

---

BE8253 important 16 Mark questions

---

BE8253 Syllabus Basic Electrical Electronics and Instrumentation Engineering

---

BE8253 Notes Basic Electrical Electronics and Instrumentation Engineering

---

BE8253 Question Bank Basic Electrical Electronics and Instrumentation Engineering

---

 

PH8251 important questions Materials Science

PH8251 important questions Materials Science for Regulation 2017 Anna University. The important questions for PH8251 Materials Science is provided in this page to download.

Sample for PH8251 important questions MATERIALS SCIENCE:

What are Nanomaterials?

Nanomaterials are the materials with atoms arranged in nano sized clusters which become the building block of the material. Any material with a size between and 100 nm[ 10^–9 m to 10^–7m] is called nanomaterials.

Give the principle of Shape memory Alloys

The shape memory effect occurs between two temperatures states, ie., Martensite and Austenite. The SMA in the Marteniste is attained the temporary deformed shape when cooling. But when heating the martensite state is changed into Austenite state. During deformation the resistivity, thermal conductivity, Young modulus and yield strength are decreased by more than 40%.

Define Hysteresis of a SMA?

Hysteresis of a SMA is defined as the difference between the temperatures at which the material is 50% transformed to austenite when heating and 50% transformed to martensite when cooling.

Define Cooper pair.

The electron pairs called cooper pairs are formed at low temperature by overcoming the repulsive forces. The cooper pairs moves without scattering (without any resistance) in the lattice structure. Now the material becomes super conductor. This is also called as electron-phonon- electron interaction these two electrons have equal and opposite momentum and spins.

What are the characteristics of high temperature [high T_C] superconductors?

High Superconductors have high temperatures.

They have a modified perovskite crystal structure.

Superconducting state is direction dependent.

These are oxides of copper with other elements.

These are reactive, brittle, and cannot be easily modified or joined.

For high superconductors, liquid Nitrogen is used instead of liquid helium.

Subject Name	MATERIALS SCIENCE
Subject Code	PH8251
Regulation	2017
File	important questions PDF

PH8251 important questions click here to download

MA8251 Syllabus Engineering Mathematics 2 Click here

---

GE8291 Syllabus Environmental Science and Engineering click here

GE8291 important questions Environmental Science and Engineering

GE8291 important questions Environmental Science and Engineering important questions for regulation 2017 Anna University.

The Environmental Science and Engineering important questions are provided in PDF format in this page.

Sample for GE8291 important questions with answers:

What are the threats to the Indian biodiversity?
Threats to Indian biodiversity- deforestation, destruction of wetlands, habitat
fragmentation, raw material, production of drugs, illegal trade and developmental
activities.

India as Mega diversity nation – Account.
India is one among the 12mega-diversity countries in the world. It has
89,450 animal species accounting for 7.31% of the global faunal species and
47,000 plant species which accounts for 10.8% of the world floral species. The
loss of biodiversity is about 33%.

Mention the abiotic components.
The non-living components of an ecosystem called abiotic components.
Examples: climate, soil, water, air, energy, nutrients, etc.

Mention the effects of solid waste.
Spreading of fungal diseases; Bad odours; Burning of waste produce
chemicals which are harmful to human life; Contaminates water & Affects the
characteristics of soil .

What are the harmful effects of land degradation?
Harmful effects of land degradation. – Soil structure and texture are deteriorated,
loss of soil fertility due to loss of valuable nutrients, increase in water logging,
salinity, alkalinity, acidity problems.

What is desertification? Give any two reasons for it?
Desertification is a progressive destruction or degradation of arid or
semiarid lands to desert. Desertification is characterized by DE vegetation,
depletion of ground water, salination and soil erosion.

Define sustainable development.
Sustainable development is defined as, “meeting the needs of the present without
compromising the ability of future generation to meet to meet their own needs”.

What are objectives of family welfare programme?
Slowing down the population explosion by reducing the fertility.
Due to pressure, over exploitation of natural resources reduced.

Subject name	Environmental Science Engineering
Subject Code	GE8291
Regulation	2017 Regulation
File details	Important questions in PDF format

Download GE8291 Important questions

1st unit GE8291 Important questions click here to download

 

2nd unit GE8291 Important questions click here to download

---

3rd unit GE8291 Important questions click here to download

---

4th unit GE8291 Important questions click here to download

---

5th unit GE8291 Important questions click here to download

---

GE8291 Important questions 16 Mark Questions Click here

---

GE8291 Syllabus Environmental Science and Engineering

---

GE8291 Notes Environmental Science and Engineering

---

GE8291 Question Paper Environmental Science and Engineering

---

Other links

MA8251 Engineering Mathematics 2 Syllabus and notes click here

---

PH8201 Physics For Civil Engineering notes click here

---

BE8251 Basic Electrical and Electronics Engineering click here

---

HS8251 Syllabus Technical English Download  click here

---

GE8292 Engineering Mechanics Syllabus and notes click here

---

GE8261 Engineering Practices Laboratory syllabus click here

---

CE8211 Computer Aided Building Drawing syllabus click here

---

Civil Engineering subjects for regulation 2017

---

Mechanical Engineering (MECH) subjects for regulation 2017

---

Electrical and Electronics Engineering (EEE) subjects for regulation 2017

---

Electronics and Communication Engineering (ECE) subjects for regulation 2017

---

Computer Science and Engineering (CSE) subjects for regulation 2017

---

Information Technology (IT) subjects for regulation 2017

PH8253 important questions Physics for Electronics Engineering

PH8253 important questions Physics for Electronics Engineering for Anna University Regulation 2017.

Download the PH8253 Physics for Electronics Engineering important question with Answer in this page for second semester EEE department.

Subject Name	PHYSICS FOR ELECTRONICS ENGINEERING
Subject Code	PH8253
Regulation	2017
File	PDF

Download PH8253 important questions 

1st unit ELECTRICAL PROPERTIES OF MATERIALS important question click here to download

2nd unit SEMICONDUCTOR PHYSICS important questions click here to download

---

3rd unit MAGNETIC AND DIELECTRIC PROPERTIES OF MATERIALS important question click here to download

---

4th unit OPTICAL PROPERTIES OF MATERIALS important questions click here to download

---

5th unit NANOELECTRONIC DEVICES important questions click here to download

---

Other links

PH8253 Question Paper

---

ph8253 notes click here

---

For ph8253 syllabus click here

---

MA8251 Engineering Mathematics 2 Syllabus and notes click here

---

GE8291 Environmental Science and Engineering syllabus click here