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 2316

how single phase preventer works ?

2535

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

MES, NCC,

2 10325

What is meaning of tlc

Backbone,

2090

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

1802

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

Ankit Metal Power,

1 3567

what gas is present in incandescent and florescent bulbs

4 5045

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

1 2798

how statics is different from dynamics

1667

What is the m25

Itd Cementation India, L&T,

6 8931

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,

1872

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 2592

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

2 37658

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

Sail,

2 3727

What is vapour flooding and liquid floodin in distillation?

Deepak Fertilisers,

1687

Un-Answered Questions { Engineering }

dear sir i m anshul kumar from dehradun i want to last five year railway chandigarh and allahabd entrance exam papers pls send it on my id my id is anshuldhiman83@gmail.com or anshuldhiman@rediffmail.com i shall be very greatful to u thank u

2418

i have gear oil pump with single phase motor.some time its motor starts running in reverse direction rather than forward direction...whats the reason behind this issue. 1- either capacitor is week? 2- or winding is week?

1409

What is the fault or needs to be done when frequency in ac drives is not changing?

1660

What is the current carrying capacity of 0SWG,3SWG,10 & 12 SWG solid bare overhead copper conductors?

3444

Give example of heterogeneous systems.

1013

Is it possible to download the Siemens Selection Chart(TYPE 2 coordination) for 1) fuseless selection 2)Fuse selection

8223

What are hrc fuses and where it is used?

1185

Lux meter is the measuring device to measure the lux level of lighting fixture. in industrial sector two types of lighting fixture is being used as street lighting purpose 1. HPSV (Sodium) and 2. HPMV (Mercury). HPMV having white light which is an combination of red, blue and yellow colour, while HPSV haivng Yellow lighting. in HPSV red & blue colour will be absent. during measurement of the lux level of HPSV and HPMV fixture. 1. Lux meter can measure the actual lux level of both fixture? 2. or it will show false reading for HPSV fixture light as it has only yellow light present. please give me answer

4652

i have interview in Pepsi company what type of question will ask please send the question and answeer

3467

We take the area of collector wide comparison to base and emitter. Why?

1053

Dear Sir, Please send me the questions frequently asked during bhel persoal interview for supervisor trainee With worm regards, Alok Kumar Rout e-mail id- rjdalok22@gmail.com

1927

draw shematic diagram of c/v positioner(smart type)?

2223

Illustrate â€“Any two Head dresses of Mauryan & Sunga period.

Draw torque - speed curve and load curve of induction motor? mark operating point ?

2057

what is the basic construction diffrance between servo motor ans sqiralcage induction motor

2479

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