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Thermal Engineering Interview Questions

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  • A bearing is designated as 6205 , what is it’s bore diameter?
  • advantages and disadvantages of using LPG in car?
  • All Rector or Exchanger have spherical/hemispherical end Why?
  • Compare Brayton and Otto cycle.
  • current rating of a 3 phase DG set is 20 Amps, but what will be the per phase current for single phase supply.
  • Define Overall Heat transfer coefficient.
  • Does Is 2062 Specifies Only Seamless Pipes Or ERW Pipe Is Also Covered Under Is 2062
  • During Steam Blowing Of Pipe Line, A Bluish Color Conical Pattern Is Observed At The End Of?
  • even though LPG is economical than petrol,why we are not promoting LPG usage?
  • explain bearing nomenclature with example.
  • Explain Why Nozzles are made convergent and Divergent?
  • Function of clutch
  • How a Diesel Engine Works in Generators?Explain with Labeled Diagram.
  • how can you increase the efficiency of power plant without changing in effort?
  • how gravity filling machine is designed
  • How hydraulic power steering @ clutch works please explain?
  • how much efficiency loss will took place in a steam turbine due to low vacuum
  • how to calculate the speed of conveyer in meter per minute
  • How to convert from HP to BHP or CC to BHP please explain?
  • How to find rating of Chiller a.c. plant i.e. how to calculate the a.c. load of an area, feed by Chiller ?
  • How to measure sound level of engine of tractor?
  • how turbo charger works?
  • If I want to set a power plant in desert of ‘Rajasthan’ and I have option of steam and gas power plant. Which plant I should set up?
  • if the blade height is increased,then how it increases the specific speed of centrifugal pump?
  • if you have to give support in 1 km long bridge,where you will give it & how many?
  • In a Waste heat recovery boiler feed control valve is after the economizer where as in auxiliary boiler feed control valve is given before the economizer.why?
  • In auto mobile industry for any type of vehicle how can we differentiate 2 stroke and 4 stroke engine….
  • In hydraulic clutch mechanism can i adjust clutch play? if it is possible please explain ?
  • increase in unit speed increases the discharge of impulse turbine how?
  • Name fuels used in nuclear power plant?
  • On what property u can distinguish material as brittle or ductile?
  • On what thermodynamic cycle nuclear power plant works?
  • Pipe. What’s The Concept Behind It?
  • Purpose of centrifugal pump casing wear ring and impeller wear ring what is back plate in centrifugal pumps and its purpose?
  • Suppose a steel bar of cross sectional area A is subjected to load P at one end and 2P at the other end ,what will be the induced
  • what are engines that use carburetor and that use inductor ? difference between them
  • What are the conditions considered while evaluating MARGIN OF SAFETY for newly designed mechanical components….? or
  • what are the types of welding machine?
  • What are your significant functional achievements in the present company? How did they contribute to the total process
  • What does a pump develops? Flow or Pressure. Give the Answer with Proper Logic.
  • what for orifice using in liquid flow line
  • what is bearing? how many types of bearing
  • What is difference between sand blasting and grit blasting ? What is its purpose and how is it done ?
  • what is drive speed & what is driven speed
  • What is Dry Bulb Temperature and Wet Bulb temperature?
  • what is electronically operated pneumatic valves? give one example
  • What is FEED?
  • what is friction?
  • what is gear ratio & how it can calculate
  • what is gyroscopic & gyroscopic effect?
  • What is mean by Resistance welding
  • What Is Mean By Ss-314(Stainless Steel Pipe Grade)?
  • what is pulverization
  • what is requirement of bottle filling machine
  • What is Solution Annealing? kindly explain its process in brief.
  • what is the basic need for designing the bottle filling machines
  • What is the critical speed. Compare the critical speed of hollow shaft and solid shaft.
  • What is the definition of mechanical
  • What Is The Difference Between Rated Speed And Economic Speed?
  • What Is The Difference In Is2062 And Is1239
  • what is the difference between construction of reaction turbine and impulse turbine
  • what is the difference between Torque and Power ( layman Idea)?
  • what is the manufacturing process for impellers of closed, semi open and open type?
  • What is the principle of operation of simple jet propulsion system?
  • what is the relationship between cop and hp(horse power) of compressor?
  • what is the thermodynamics?
  • what is the use of vanadium (non metal) ?
  • What is thermodynamics?
  • what is unit Ps ?
  • what’s the difference between front and rear wheel drive?on what basis we choose the type of drive?
  • what’s the range of poisson’s ratio of a stable material??
  • when a solid shaft is subjected to tension its linear dimension changes equally as its lateral dimension,then what will be its poisson’s
  • Whether ductile material can fail in brittle manner? WHEN?
  • which engine is more suitable over all. petrol engine, diesel engine . what are their differences
  • Who are the leaders among expansion valve manufacturers? what are the recent developments in the expansion valve industry, used in refrigeration and air-conditioning?
  • Why Air Conditioner capacity measured in Ton. Like 1.5ton
  • why as atmospheric pressure increases,boiling point also increases?
  • why de-super heater tubes are bend in shape
  • why diesel engine does not have spark plug like petrol engine, how ever petrol is better fuel than diesel?
  • why does cycle rim don’t bend even in heavy loads?
  • Why green curtains are used in hospital?
  • why petrol engine gives more power than diesel engine even though diesel engine has high compression ratio?
  • why petrol engines have more power than diesel engines of same capacity?
  • why the back wheel of tractor is bigger than front wheel?
  • why the path of a satellite is always elliptical with earth not at the centre of the ellipse?
  • Why tires are manufactured in black colour?
  • why we cant measure absolute entropy directly,but the change we can?
  • why we express the unit of torque in Nm.even though it can be expressed as Joule ( J )?
  • why we have to know the specific frequency of any equipment? does anybody know about specific frequency ?
  • Will anybody tell me about types and numbers of sensors in Toyota corolla GLI, Honda civic and Suzuki Cultus VXRI?
  • Write down the expression for air standard efficiency of diesel cycle?
  • You have to design a machine component. For what type of failure (ductile or brittle) you will design?

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