Thermal Engineering Questions and Answers

Thermal Engineering Interview Questions and Answers

Our 1000+ Thermal Engineering questions and answers focuses on all areas of Thermal Engineering subject covering 100+ topics in Thermal Engineering. These topics are chosen from a collection of most authoritative and best reference books on Thermal Engineering. One should spend 1 hour daily for 2-3 months to learn and assimilate Thermal Engineering comprehensively. This way of systematic learning will prepare anyone easily towards Thermal Engineering interviews, online tests, examinations and certifications.


– 1000+ Multiple Choice Questions & Answers in Thermal Engineering with explanations
– Every MCQ set focuses on a specific topic in Thermal Engineering Subject

Who should Practice these Thermal Engineering Questions?
– Anyone wishing to sharpen their knowledge of Thermal Engineering Subject
– Anyone preparing for aptitude test in Thermal Engineering
– Anyone preparing for interviews (campus/off-campus interviews, walk-in interview and company interviews)
– Anyone preparing for entrance examinations and other competitive examinations
– All – Experienced, Freshers and Students


Here’s list of Questions & Answers on Thermal Engineering Subject covering 100+ topics:

1. Questions & Answers on Steam Generators

The section contains questions and answers on boilers classification, boilers selection and terminology, fire tube boilers, water tube and high pressure boilers.

Classification of Boilers
Selection of Boilers and Boiler Terminology
Fire Tube Boilers – 1
Fire Tube Boilers – 2
Water Tube Boilers
High Pressure Boilers

2. Questions on Boiler Mountings and Accessories

The section contains questions on boiler mountings and accessories.

Boiler Mountings – 1
Boiler Mountings – 2
Boiler Accessories – 1
Boiler Accessories – 2

3. Questions & Answers on Draught & Steam Generators Performance

The section contains questions and answers on draught classification, natural and artificial draught, boiler efficiency, evaporative capacity and equivalent evaporation.

Definition and Classification of Draught
Natural Draught
Artificial Draught
Evaporative Capacity and Equivalent Evaporation
Boiler Efficiency

4. Questions on Steam Nozzles

The section contains questions on steam flow through nozzles, nozzle efficiency, super saturated flow and wilson’s line, nozzle flow area, velocity and pressure relationship.

Steam Flow Through Nozzles
Nozzle Efficiency
Super Saturated Flow and Wilson’s Line
Relationship Between Area, Velocity and Pressure in Nozzle Flow

5. Questions & Answers on Steam Turbines

The section contains questions and answers on steam turbines, rotor speed reduction methods, impulse and reaction turbines, reheat factor, steam turbine energy losses, steam turbine governing and control.

Classification of Steam Turbines
Methods of Reducing Rotor Speed
Impulse Turbines – 1
Impulse Turbines – 2
Reaction Turbines – 1
Reaction Turbines – 2
Reheat Factor and Energy Losses in Steam Turbines
Steam Turbine Governing and Control

6. Questions on Steam Condensers

The section contains questions on steam condensers classification, jet condensers, surface condensers, air leakage sources and effects, condenser, vaccum efficiency, partial pressure dalton’s law, cooling water quantity, cooling towers and air pump.

Classification of Steam Condensers
Jet Condensers
Surface Condensers
Sources and Effects of Air Leakage
Condenser and Vacuum Efficiency
Dalton’s Law of Partial Pressure
Quantity of Cooling Water Required
Cooling Towers
Air Pump

7. Questions & Answers on Reciprocating Steam Engine

The section contains questions and answers on reciprocating steam engine definition, classification, parts, working and terminology, diagram factor, heat balance sheet, theoretical and actual indicator diagram.

Definition and Classificaton
Parts, Working and Terminology – 1
Parts, Working and Terminology – 2
Theoretical Indicator Diagram
Actual Indicator Diagram and Diagram Factor
Heat Balance Sheet

8. Questions on Fluidized Bed Boilers

The section contains questions on cogeneration basics, combined cycles, bubbling and circulating fluidized bed boilers.

Bubbling Fluidized Bed Boiler
Circulating Fluidized Bed Boilers
Introduction to Cogeneration and Combined Cycles

9. Questions & Answers on Internal Combustion Engines

The section contains questions and answers on heat engines, two and four stroke engines, ignition system and its requirements, fuel injection system, cooling and lubrication system, s.i engine combustion, ic engine performance, octane and cetane number, dissociation, supercharging, knock affecting factors and detonation.

Heat Engines
Two-Stroke Engine
Four Stroke Engines
Ignition System
Requirements of Ignition System
Fuel Injection System – 1
Fuel Injection System – 2
Cooling System
Lubrication Systems
Combustion in S.I. Engine
IC Engine Performance Parameters
Octane and Cetane Number
Governing of IC Engines
Factors Affecting Knock
Detonation (or) Pinking

10. Questions on Gas Power Cycles

The section contains questions on otto cycle, diesel cycle, dual combustion cycle and brayton cycle.

Otto Cycle (or) Constant Volume Cycle
Diesel Cycle (or) Constant Pressure Cycle
Dual Combustion Cycles
Brayton Cycle

11. Questions & Answers on Air Compressors

The section contains questions and answers on rotary and centrifugal compressor, air compressors classification, reciprocating compressor, hermetic sealed compressor, screw and scroll compressors.

Rotary Compressor
Centrifugal Compressor
Classification of Air Compressors
Reciprocating Compressor
Hermetic Sealed Compressor
Screw Compressor
Scroll Compressor

12. Questions on Refrigeration

The section contains questions on vcr system mechanism, ideal var system, heat pump, refrigerator, refrigeration performance, refrigerants classification, cascade systems, multi stage vcr system, actual vcr cycle, air refrigeration system and throttling process.

Mechanism of Simple VCR System
Ideal VAR System
Heat Pump
Refrigerator and Heat Pump
Co-Efficient of Performance of Refrigeration – 1
Co-Efficient of Performance of Refrigeration – 2
Classification of Refrigerants
Cascade Systems – 1
Cascade Systems – 2
Multi Stage Vapour Compression System
Actual VCR Cycle
Air Refrigeration System
Throttling Process

13. Questions & Answers on Air-Conditioning

The section contains questions and answers on air conditioning systems, air conditioning equipment, components and controls, bootstrap air cooling system and ducts.

Air Conditioning Systems
Air Conditioning Equipment, Components and Controls
Bootstrap Air Cooling System

14. Questions on Heat Transfer

The sections covers questions on heat transfer by conduction, convection and radiation, heat exchangers and fins.

Heat Transfer by Conduction
Heat Transfer by Convection
Heat Transfer by Radiation
Heat Exchangers

15. Questions & Answers on Basic Steam Power Cycles

The section contains questions and answers on rankine cycle, regenerative cycle, reheat and binary vapour cycle.

Rankine Cycle
Simple Steam Power Cycle and Rankine Cycle
Regenerative Cycle
Reheat Cycle
Binary Vapour Cycle – 1
Binary Vapour Cycle – 2
Binary Vapour Cycle – 3

16. Questions on Compound Steam Engine, Thermodynamics Laws and Kinetic Theory of Gases

The section contains questions on steady flow energy equations, thermodynamics second law, compound steam engines classification, thermometry & thermometers types.

Engineering Applications for Steady Flow Energy Equation
Second Law of Thermodynamics
Thermometry & Thermometers Types
Classification of Compound Steam Engines

17. Questions & Answers on Properties of Pure Substances

The section contains questions and answers on pure substance, pressure volume temperature surface, pure substances pressure temperature and phase changes.

Pure Substance
Phase Change of Pure Substances
Pressure Temperature for Pure Substances
Pressure-Volume-Temperature Surface

18. Questions on Thermodynamic Relations, Ideal and Real Gases

The section contains questions on thermodynamic relations, ideal gases, real gases, gas and vapour mixtures.

Thermodynamic Relations
Ideal Gas – 1
Ideal Gas – 2
Ideal Gas – 3
Ideal Gas – 4
Real Gases
Gas and Vapour Mixtures

19. Questions & Answers on Psychometrics

The section contains questions and answers on psychrometers, psychrometric chart, heating and cooling factor, psychrometric chart process, humidification and dehumidification.

Psychrometric Chart – 1
Psychrometric Chart – 2
Psychrometric Chart – 3
Psychrometric Chart – 4
Heating and Cooling Factor – 1
Heating and Cooling Factor – 2
Humidification and Dehumidification

20. Questions on Gas Turbines and Jet Propulsions & Non-Conventional Power Generation

The section contains questions on biogas plants types, gas turbines classification, jet propulsions, wind, tidal and solar thermal power plants.

Types of Biogas Plants – 1
Types of Biogas Plants – 2
Classification of Gas Turbines
Jet Propulsions
Wind Thermal Power Plant
Tidal Thermal Power Plant
Solar Thermal Power Plant

21. Questions & Answers on Heat and Mass Transfer, Availability and Irreversibility

The section contains questions and answers on availability and irreversibility, mass transfer, phase change heat transfer and variable specific heats.

Availability and Irreversibility
Mass Transfer
Phase Change Heat Transfer
Variable Specific Heats

22. Questions on Fuels and Combustion

The section contains questions on fuels and combustion, combustion equipments, coal analysis and carbonization.

Fuels and Combustion
Fuel Combustion and Combustion Equipments
Analysis of Coal

23. Questions & Answers on Dimensional and Modal Analysis, Flow through Circular Conduits

The section contains questions and answers on circular conduits flow, dimensional and modal analysis.

Model Analysis Flow through Circular Conduits

24. Questions on Pumps, Condensers and Kinematics of Flow

The section contains questions on centrifugal and reciprocating pumps, condensers types, heat transfer coefficients, fluid properties and carbonization.

Centrifugal & Reciprocating Pumps
Types of Condensers
Condensers – Heat Transfer Coefficients – 1
Condensers – Heat Transfer Coefficients – 2
Fluid Properties – 1
Fluid Properties – 2

25. Questions & Answers on Evaporators & Expansion Valves

The section contains questions and answers on evaporators and expansion valves.

Evaporators Types – 1
Evaporators Types – 2
Expansion Devices
If you would like to learn Thermal Engineering thoroughly, you should attempt to work on the complete set of questions and answers mentioned above. It will immensely help anyone trying to crack an exam or an interview.

Here’s the list of Best Reference Books in Thermal Engineering.

Wish you the best in your endeavor to learn and master Thermal Engineering!

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