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

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Engineering Interview Questions

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Question 65 – A differential equation is given as y” + 5y’ + 6y = 0, y(0) = 2 and y’(0) = 3. By using Laplace transform, an engineer has correctly produced the equation L {y} = (2s + 13) / [(s + 2)(s + 3)] = A / (s + 2) + B (s + 3). (a) Find the values of A and B. (b) The inversed Laplace transform of 1 / (s + a) is given by exp (-at) where a is a constant. If the statement : L {y} = 9 L { exp (-2t) } - 7 L { exp (-3t) } is correct, find the equation of y as a function of t as a solution to the differential equation stated in the beginning of this question. When L {d} = 9 L {b} - 7 L {c}, then d = 9b - 7c with b, c and d are unknowns.

1 2261

how single phase preventer works ?

2503

what is the function of primary pump and secondary pump in HVAC plant.?

MES, NCC,

2 10208

What is meaning of tlc

Backbone,

2035

Why IR value of the (HT cable Plus synchronous motor) is less while individually having IR values in GΩ?

1757

How and where from do we get 162 for calculating sectional weight of TMT

Ankit Metal Power,

1 3500

what gas is present in incandescent and florescent bulbs

4 4884

How LVDT position transmitter works on DC supply(24vdc) from DCS, whereas transformer operates on AC supply? pls help..

1 2728

how statics is different from dynamics

1620

What is the m25

Itd Cementation India, L&T,

6 8681

What is a advantage of Self Reset Lockout ? On Fault breaker get trip & fault no longer exist then self reset lockout how inform us?

Bhad Engineers,

1833

Question 66 – The drag coefficient Cd = 0.05 and lift coefficient Cl = 0.4 for a levelled flow aircraft are measured. The velocity of the aircraft is v = 150 ft / s with its weight W = 2677.5 pound-force. (a) Find the value of the lift of the aircraft, L, when it is also its weight. (b) The drag of the aircraft, D = Cd M, L = Cl M. Find the value of D. (c) The power required is P = Dv. If 1 pound-force x (ft / s) = 1.356 W, find the value of P in the unit of Watt or W.

1 2521

What are formula we can apply to determine the HT/LT current of 11KV/433V transformer except KVA/LV×√3. ?

2 37486

a new 3ph induction motor doesn't rotates their ratted speed, why ?

Sail,

2 3630

What is vapour flooding and liquid floodin in distillation?

Deepak Fertilisers,

1636

Un-Answered Questions { Engineering }

I want the syllabus of Section Enginner(Signal & Telecom) of RRB Exam

2800

what sort of general awareness questions are asked in o.n.g.c entrance exam?????????????????

4597

Define setup time?

1076

what is tension footing?

1940

how to design orifice plate?what is the equation?

2021

What is the condition to be satisfied in the selection of l and c in a series inverter?

1844

What is the most economical spacing of buttress ?

1336

As a foreign applicant, what do you understand about our company before sending your application CV for consideration?

3581

3ph motor running with unequal kw and different pf what are the reasons

1795

Will a steel cable become longer if it is heated while under load?

1187

Diagram and details of polarity test for Current Transformer 11kv 400/200/100/1A

2992

Tell us what is clipping?

What is an ac motor?

1222

How to do gas analysers calibration in AUTO and Manually by using zero and span gas?

2313

How can we find the breaking capacity of a Load breaker switch (LBS) fed from 11 kv supply??ex:50KA, 26kA etc???detailed step vice answer pls.

1977

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