Engineering Interview Questions, Answers for Freshers and Experienced asked in various Company Job Interviews

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Engineering Interview Questions

Questions Answers Views Company eMail

design a LV scheme for a 15 storied building?

1960

What is Niminal mix and Design Mix ? write difference between them ?

3 8017

How to work E.L.C.B and how to connect in circuit.

2026

How many kinds of E.L.C.B and how to work E.L.C.B

Accenture,

2060

Minimum IR value of 1.1 kv grade 3.5c (300, 240,185,150,120,95,70,50,35,25) sqmm Aluminium XLPE cable and 4c (16, 10,6 & 4) sqmm cu arm cable between RY,YB,BR,RN,YN,BN,RE,YE,BE & NE.

Gasco,

3358

what is work of choke in tube light?

L&T,

4 6794

what is difference between di electric and insulator?

Greenko,

2 5359

what is magnetizing and demagnetizing current in generator and motor?

HBL Power Systems,

3288

what is diffrence between dc motor and dc generator?

HBL Power Systems,

3 6311

Swg formulae

Bokaro Steel,

2045

why ten delta testing is carried out on power transformer

1834

give me name of current and volatge control device

1 4077

what is difference b/t ac current and dc current

L&T, Meghana Engineers,

4 7983

What are the motors used in a thermal power plant? (With type and ht/lt) What voltage levels are used in a thermal power plant?

OPG,

2 16006

A PLC is programmed to drive three motors A, B and C as follows : After running motor A for an hour, motor B should get ON and motor A should get OFF. And after running motor B for an hour, motor C should get ON and motor B should get OFF. And after running motor C for an hour, motor A should get ON and motor C should get OFF. (That is, a cyclic repetition with time period one hour) Now, the second condition is: If any motor gone faulty and is tripped, the consecutive motor should get ON and the faulty (tripped) motor should be eliminated from cyclic repetition. The remaining two motors should bear the cyclic repetition of one hour each. (For healthy motor take logic as high and for tripped motor take logic as low) Now, the third condition is: When motor A load(Amps) exceeds 60% of its rated load, motor B should get ON in parallel to motor A. And when both motors A & B are running in parallel, and if their load exceeds 60% of their rated load, motor C should also start in parallel to A & B. [Here the cyclic repetition is eliminated, until their loads become normal(40%)] [Take logic high(1) for load at 60% and logic low(0) for load at 40%] Now draw a flow chart or a ladder diagram to fulfill the above condition.

MNC,

2188

Un-Answered Questions { Engineering }

how to calculate Rate of analysis for 100 m3 Any ratio of concrete ? including labour

1602

What is power supply transformer?

1060

CAN CU XLPE/PVC CABLE BE USED INPLACE OF LOW NOISE SCREENED CABLE? KINDLY GIVE REASONS

1894

what can be the causes of capacitor start motor having a higher current that its actual

1980

How to calculate capacitor bank value to maintain unity power factor with some suitable example?

1162

1.what is the effect of vapour presuure in orifice plate flow measurement 2.which is more effective 2 pressure sensors or one single differential pressure sensor in orifice plate measurement 3.how to design a v/i converter and i/v converter 4.how many type of thermocouple are there 5.how many leads are there in thermocouple measurement 6.how pressure sensors are connected in level measurement in differential pressure method 7.what is the output of capacitive pressure sensor (ac or dc),how its o/p is signal charactarized 8.what is the physical meaning of discharge coeeficient,why it is calculated,orifice plate what is its value,why it is less than 1,Q at upstream is equal to or not equal to Q at downstream of orifice plate why?what is vena contracta in orifice plate 9.why rotameter is called variable area flowmeter,it can measure flow even if area is not varying,why it is made tapered 10.design a 10 bit counter ,which counter you will prefer 11.how to remove self heating error in RTD 12.which is more sensitive pt100 or pt50 13.why thermocouple are connected in parallel 14.what is lead contact error in RTD,how to avoid 15.what is P,PI,PID,PD controller,why there is no ID controller 16.what is override,split range,sequential,ratio,feedforward,cascade controller 17.why we moved from SR to JK and then JK to master slave JK flipflop,give correct reason 18.how to measure level of a closed container which contains vapour and liquid,remember no vapour gas should be leaked,so ultrasonic and capacitive is not an option,design another method 19.how to design horse race counter including sensors and signal conditioning element 20.what is bevelling

2442

Define What is the distance between railway tracks?

1149

What are the advantages of powder metallurgy?

1158

Metals, in general are of low strength and do not possess required physio-chemical and technological properties for a definite purpose. Alloys are therefore more than metals alone. Discuss the arrangement of atoms and structures of alloys.

1134

In a gas over oil actuator, after the opening/closing of valve, how the gas is vented out? How does the hydraulic/gas circuit function?

1836

What is gd&t?

1171

What is the formuala to calculate the rating of motor protection circuit breaker

2234

What is intrinsic safety mean.

1925

I have recieved an interview call from HECL that is Heavy Engineering Corporation Ltd, Ranchi , Jharkhand. Can you please provide me some Electronics and Communication questions for preparation as early as possible since I am left with just one week.

2071

why not soot blowing performed of air preheater, while soot blower is in retract position?

1962

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