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Mechanical Engineering MCQs and questions answers
Mechanical Engineering test questions for exams and entrance test
Compressors, gas turbines and Jet Propulsion - Mechanical Engineering test questions
Computer and Microprocessor - Mechanical Engineering test questions
Engineering Mechanics - Mechanical Engineering test questions
Fluid Mechanics and hydraulic machines - Mechanical Engineering test
General Engineering - Mechanical Engineering test
Heat Transfer - Mechanical Engineering test
Internal combustion engines and automobile engineering - Mechanical Engineering
Machine design - Mechanical Engineering test questions
Manufacturing science - Mechanical Engineering test questions
Mechanical measurement - Mechanical Engineering test questions
Metallurgy - Mechanical Engineering test questions
Power plant engineering and energy conversion - Mechanical Engineering test
Production Management and Industrial Engineering - Mechanical Engineering test
Refrigeration and Air-conditioning - Mechanical Engineering test
Steam boilers, engines, nozzles and turbines - Mechanical Engineering test
Strength of Materials - Mechanical Engineering test
Theory of Machines - Mechanical Engineering test
Thermodynamics - Mechanical Engineering test questions
Mechanical engineering multiple choice objective questions
Work done in raising a body of mass m by a height h is
Law of conservation of energy states that total energy of an isolated system__________
Find the Correct Equation.
Velocity of the ball when it impacts on the ground.
What will be the magnitude of the resultant velocity?
What should be the angular velocity of disk B so that the linear velocity of both the disks remains same.
Fluid is the substance that flows under the action of _________.
Property of the fluid, which offers resistance to the movement.
Which fluid is considered as an ideal fluid?
Vaporisation occurs when _______.
Pascal's law states that the intensity of pressure at a point in static fluid is _______.
The properties which are independent of mass of system are called as ____.
Which of the following statements is correct for closed system?
Enthalpy is _______.
When two bodies are in thermal equilibrium with third body separately then ______.
Isochoric is the process in which ____
Two physical systems are in thermal equilibrium when ______.
Kelvin-planck statement of second law of thermodynamics is related to _____.
Heat engine having thermal efficiency of 100% is called as Perpetual Motion Machine of _______.
Find the correct relation between COP of heat pump and COP of refrigerator.
In Carnot cycle which of the following processes are involved?
Entropy is a property which _____
Which of the following energy is not high grade energy?
The maximum work output from a certain heat input in a cyclic heat engine is called as _________.
A substance having constant chemical composition through its mass is called as ____.
The actual work done by a system is always less than the idealized reversible work, and the difference between the two is called as _____.
What will be the COP and power consumption by the cycle.
If a system A violates the Kelvin-Planck statement for heat engine then which is among the following conditions is correct.
If the Carnot engine is operated between the same two reservoirs, then which of the following statement is correct.
Considering the statement and equation which of the following statement is correct?
At the absolute zero temperature, the entropy of any thermodynamic system is ___.
It is possible to bring a thermodynamic system to absolute zero with finite number of operations. The above statement is ____.
What is the ideal gas equation?
According to the kinetic theory of gases the collision between the molecules are ___.
Which of the following is the property of a thermodynamic system?
Which cycle has a maximum efficiency?
The rate of flow of heat through a single homogeneous solid depends upon____.
Which is among the following has lowest thermal conductivity?
Gas A has a higher molecular weight than gas B. Which gas has a smaller thermal conductivity?
Which mathematical representation is correct for Fourier's law of conduction?
The translatability (τ) and absorptivity (α) of a perfectly black body are ____.
In which process the energy is transferred by means of electromagnetic?
A body which absorbs all incident radiation is called as ____.
Which of the following statement is correct for white body?
The emissive power of gray body is ____.
Ratio of emissive power of gray body at a temperature to the emissive power of black body at the same temperature is called as ____.
What are Free or natural vibrations?
In forced vibration system the vibration has ____.
Internal resistance offered by a body or a material against deformation is called as ____.
Intensity of resisting force parallel to the material cross sectional plane is called as _____.
Poisson's ratio gives a relationship between _____.
Force needed to extend or compress a spring
The ratio of stress to the strain is called as _____.
Young's modulus is related to _____.
Kinematic links are the parts of a machine which ____.
The body which is capable of transmitting required forces to a negligible deformation is known as.
Which is among the following is NOT a type of kinematic link?
Which of the following statements is NOT correct for a machine?
Choose the correct statement/s related to structure.
When two elements of a machine comes in contact with each other then____.
Relative motion between a paired links or elements.
Incompletely constrained motion is the motion in which____.
Higher pair is the pair in which the contact between the links or elements is ____.
Which among the following is not a lower pair?
Dynamic load is the loads which ____.
Find the impact load/s among following examples?
While designing any machine element, maximum stress to that element should be ____.
Factor of safety is the ratio of ___.
Which among the following are the factors, affecting factor of safety?
Rankine theory is ___.
The Rankine theory is satisfactory applicable for those components which are made of ___.
The crack in an part usually occur only on one side of the cross-section of the part when a part is subjected to ____.
In fatigue curve of a material, the log-log graph is plotted between ____.
Fatigue limit and Endurance limit
State whether the following sentence is True or False.
The mould which is used only once and must be broken to make solidified casting free is called as ____.
Which are among the following defects in sand casting?
Which is among the following is NOT an inspection method for defects?
Blow holes are caused by ____.
Which defect may be caused by low strength and low hardness of the mould?
When the working temperature is higher than the crystallisation temperature, it is called as ____.
What does the following stress strain curve represents.
Temperature of the workpiece in metal working depends on ____.
The density of a material increases during ___.
Which of the following are the hot working processes ?
In hot working process ____.
The material grains are permanently distorted in ____.
Cold working process results in ____.
Which among the following is cold working process ?
State whether the following sentence is True or False, for cold working operation.
In Autogeneous joining process ___.
Which filler is suitable for joining iron and silver which are insoluble in each other ?
In welding process, the melting point of the filler metal that is solder or any alloy is______.
The welding in which the joining metals are actually melted down and joining is carried out by further solidification is called as ____.
Fusion welding is ____.
Strength of the fusion welding depends upon ____.
An example of fusion welding is.
Spot welding process is difficult for
Which type of weld does the following symbol show?
Joining surfaces heated by electric current and axial compression.The welding process is _____.
Thermodynamics - Basics and Laws of Thermodynamics
The energy of an isolated system.
The properties of a system whose values depend upon mass of the system are called as.
Which among the following is an intensive property of a system?
Homogeneous system.
Macroscopic thermodynamics ______.
A system will be in a state of thermodynamic equilibrium, if it undergoes.
Quasi-static process.
The substance which is homogeneous and invariable in chemical composition throughout its mass is called as.
The
two-property rule
statement consists that ____.
Absolute pressure is measured as.
The term which can differentiate thermodynamics from other sciences is ____.
Which law of thermodynamics is the basis of temperature measurement ?
The characteristic of a material or a body which is taken as an indication of change in temperature is known as.
Which of the following is chosen as a standard thermometric substance ?
What will be the ideal gas equation for the following.
In electric resistance thermometer, the thermometric property is
The thermocouple circuit which is used to measure temperature works on ____.
The thermodynamic work done by the system on the surrounding is considered as ____.
Numerical on resistance thermometer.
Amount of Work done by the system.
Work involved in a thermodynamic process is.
Work done in a constant volume process is
Which among the following systems undergo/s work transfer ?
In free expansion of gas, the work transfer is
Heat is transferred across a boundary by virtue of a temperature difference. The heat is transferred, that means
Heat flow is a quantity of heat transfer.
The process in which no heat transfer takes place through boundaries is called as.
Heat transfer is.
Equation for calculating amount of heat transfer through a system boundary.
The amount of heat required to raise a unit mass of substance through a unit rise in temperature is called as.
The amount of heat transfered to convert unit mass of solid to vapour or vice versa is called as.
When the heat transfer into a system is more than the work transfer out of the system, then
Change in Internal Energy of a System.
Equation for the First Law of Thermodynamics.
Which of the following is NOT a path function ?
Which of the following is/are mode/s of storage of internal energy in a system?
A machine which can supply mechanical work continuously without consumption of any energy is called as
Total amount of energy in the universe is
Which among the following statements are correct ?
A quasi-static process has main characteristics as it is a
Practically heat and work are completely interchangeable forms of energy.
First law of thermodynamics provides.
The thermodynamic cycle in which heat is transferred to the system and work is transferred from the system.
Which of the following is NOT the heat engine cycle.
Efficiency of heat engine cycle is the ratio of
A thermal energy reservoir (TER) has
The thermal energy reservoir from which heat is transferred to the system which works on heat engine cycle is called as
Which among the following is/are example/s of sink ?
Which among the following are the examples of mechanical energy reservoir?
Heat engine cycle.
Second Law of Thermodynamics.
If a heat engine produces net work output by exchanging heat with only one reservoir, then the heat engine will be,
Clausius statement is related to.
The coefficient of performance (COP)
ref
of refrigerator is given by.
Which among the following is correct relation between COP of heat pump and COP of refrigerator ?
COP of a heat pump is.
Kelvin-Planck and Clausius statement.
In which process, every state passes by the system is an equilibrium state ?
All spontaneous processes are
The irreversibility of a process occurs due to.
Heat transfer is an irreversible process if
If temperature difference between two bodies in which heat transfer takes place increases, the irreversibility
Free expansion of gas within a system is
A process in which work is done without producing an equivalent increase in the KE or PE is
A process of application of breaks in a vehicle is
A process becomes reversible when
Carnot cycle is
Which of the following is a reversed heat engine?
As per Carnot's theorem, efficiency of a reversible heat engine operating between a same given constant temperature
Numerical - efficiency of reversible heat engines of different capacities at same temperature difference
Match the following.
The efficiency of the Carnot cycle is the function of
The Kelvin temperature scale is independent of the certain characteristics of any substance.
Which point is taken as the standard reference point to define the Kelvin temperature scale?
Arbitrarily, the value of triple point is taken as
The thermometric property in the Kelvin scale is
To achieve a definite zero point on the Kelvin scale, we have to violate
The temperature at which a system undergoes a reversible isothermal process without transfer of heat is called as
Any attainable value of absolute temperature is
Effect of fall in sink on efficiency of a heat engine
The irreversibility in the system caused by friction is an example of
When a process becomes irreversible due to heat interaction between system and surrounding at the boundary, irreversibility is
Match the following irreversibilities.
Numerical - Max efficiency of a heat engine at a given source and sink temperature
PMM2 is the machine which violates
Automobile Engineering- Combustion Process, Fuel System in Petrol & Diesel Engine
Which stroke is the power stroke in a four-stroke engine?
In diesel engine, what is used to ignite the fuel?
Automobile Engineering - Cooling, Lubrication & Supercharging of Engine
What is the function of a thermostat in automobile cooling system?
Various parts of automobile cooling system and their related functions
Automobile Engineering - Clutch, Gear box, Propeller Shaft & Universal Joint
What is the function of gear box in an automobile?
The propeller shaft in an automobile is connected between
Automobile Engineering - Brakes, Wheels and Tyres, Suspension System
Problems on stopping distance
How does the vapour locking in a brake system occur?
Automobile Engineering - Chassis, Auto-Electrical, Heating & AC Systems
Question on functions of the chassis
What is the function of Anti-lock brake system (ABS)?
Automobile Engineering- Emission & Control, Safety, Engine Performance & Testing
The incomplete combustion in automobile IC engines results in emission of ___
The amount of air taken inside the cylinder of IC engine is dependent on___
I. C. Engines - Cycles & Analysis - Air-Standard, Fuel-Air & Actual
In Air-Standard cycle, which process from actual cycle is replaced by the process of restoring....
Which loss/es is/are considered in the actual cycle?
I. C. Engines - Conventional & Alternative Fuels, Spark & Compression Ignition
What is used in petrol engine to ignite the fuel?
Which type of fuel the coal is?
I.C. Engines - Ignition, Combustion and Combustion Chambers
The compression ratio of diesel engine is
For the same capacity of engine, the efficiency of spark ignition engine is
I.C. Engines - Engine Friction & Lubrication, Heat Rejection & Cooling
How much heat is utilized to produce brake power from the total heat generated in combustion chamber?
Which cooling system is more convenient for aeroplane engines?
I.C. Engines - Emissions & Control, Supercharging
Supercharging of an internal combustion engine is the process of
How carbon monoxide (CO) is formed in the internal combustion engine?
I.C. Engines - Measurements & Testing, Performance Parameters & Characteristics
Relating Brake Power (bp) and Indicated Power (ip) of an I C engine, the brake power is always
What is relative fuel-air ratio?
I.C. Engines - Two-Stroke & Non-Conventional Engines
No. of revolutions the crankshaft has to complete in two-stroke engine to complete one thermodynamic cycle
Fuel is distributed for each cylinder and constantly supplied at the required pressure for injection in
Automobile Engineering - Rear Axle Assembly, Front Axle & Steering System
What is the function of differential gear box?
Why the best performance tyres must always be mounted on the rear of the vehicle?
I.C. Engines - Carburetion, Mechanical & Electronic Injection System
What is used for making proper fuel-air mixture in spark ignition engine?
What is the function of fuel injection system in I C engine?
Theory of Machines - Fundamentals of Kinematics and Mechanism
The forces and their effects, while acting upon the machine part in motion are studied in
Which kinematic pair has point contact between the links?
Theory of Machines - Static and Dynamic Force Analysis, Balancing
When is the body said to be in static equilibrium?
What is the free body diagram of the box pushed by a man on a surface?
Theory of Machines - Kinematic Analysis of Mechanism
How is kinematic inversion obtained?
Calculate relative velocity - A and B are traveling along parallel lines in a same direction with velocities 13 m/s and 5 m/s respectively.
Theory of Machines - Friction Clutches, Breaks, Dynamometer
Friction depends upon
What is the purpose of dynamometer?
Theory of Machines - Gears, Worm and Worm Wheel
How are the efficiencies of spur gear and helical gear compared?
What is the advantage/s of worm and worm wheel?
Theory of Machines - Vibrations, Cam and Follower, Governor, Gyroscope
In which vibration system, amplitude of vibration reduces toward zero with respect to time?
Effect of reactive gyroscopic couple on an aeroplane, whenit takes left turn and the rotation of propeller is in clockwise
Thermodynamics - Entropy, Exergy or Availability
Reversible adiabatic paths - MCQs with Answers
Clausius' Theorem - MCQs with Answers
Property of entropy - MCQs with Answers
Temperature-Entropy Plot - MCQs with Answers
Clausius Inequality - MCQs with Answer
Entropy Principle - MCQs with Answers
Applications of Entropy Principle - MCQs with Answers
Entropy Transfer - MCQs with Answers
Entropy Generation - MCQs with Answers
A directional Law of Nature - MCQs with Answers
Entropy and Disorder - MCQs with Answers
Absolute Entropy - MCQs with Answers
Exergy - MCQs with Answers
Dead State - MCQs with Answers
Exergy of Heat Input in a Cycle - MCQs with Answers
Quality of Energy - MCQs with Answers
Law of Degradation of Energy - MCQs with Answers
Exergy in Chemical Reaction, Irreversibility - MCQs with Answers
Exergy Balance - MCQs with Answers
Thermodynamics - Properties of Pure Substances, Gases and Gas Mixtures
Pure Substance - MCQs with Answers
Properties of Pure Substance - MCQs with Answers
Quality and Dryness Fraction - MCQs with Answers
Gases: Avogadro's Law - MCQs with Answers
Ideal Gas - MCQs with Answers
Equation of State - MCQs with Answers
Properties of Mixture of Gases - MCQs with Answers
Joule-Kelvin Effect - MCQs with Answers
Types of Equilibrium - MCQs with Answers
Heat Transfer - Conduction & Covection
Basics of Heat Transfer - MCQs with Answers
Modes of Heat Transfer - MCQs with Answers
Laws of Heat Transfer - Conduction - MCQs with Answers
Laws of Heat Transfer - Radiation - MCQs with Answers
Laws of Heat Transfer - Convection - MCQs with Answers
Electrical Analogy to Heat Flow - MCQs with Answers
Plane Wall - Steady-State Heat Conduction - MCQs with Answers
Composite Wall - Steady-State Heat Conduction - MCQs with Answers
Composite Wall - Parallel & Series Heat Flow Path - Steady-State Conduction
Hollow Cylinder - Steady-State Heat Conduction - MCQs with Answers
Critical Thickness of Insulation - MCQS with Answers
Heat Conduction in Spherical Shell - MCQS with Answers
Critical Radius of Insulation for Hollow Sphere - MCQS with Answers
Steady-State Heat Conduction in Systems with Heat Generation - MCQs
Heat Transfer Through Extended Surfaces (Fins) - MCQs
Effectiveness of Fins - MCQs with Answers
Two and Three Dimensional Steady-State Heat Conduction - MCQs
Unsteady-State Heat Conduction - MCQs with Answers
Convection Heat Transfer - MCQs with Answers
Fluid Flow and Heat Transfer - 1 - MCQs with Answers
Fluid Flow and Heat Transfer - 2 - MCQs with Answers
Nusselt Modulus - MCQs with Answers
Estimation of Convection Heat Transfer Coefficient - MCQs with Answers
Dimensional Analysis for Estimation of Convection Heat Transfer Coefficient - 1 - MCQs with Answers
Dimensional Analysis for Estimation of Convection Heat Transfer Coefficient - 2 - MCQs with Answers
Laminar Boundary Layer on a Flat Plate - MCQs with Answers
Turbulent Boundary Layer - MCQs with Answers
Natural Convection and Forced Convection - 1 - MCQs with Answers
Natural Convection and Forced Convection - 2 - MCQs with Answers
Thermodynamics - Vapour and Gas Power Cycle
Simple Steam Power Cycle - MCQs with Answers
Rankine Cycle - MCQs with Answers
Actual Vapour Power Cycle - MCQs with Answers
Comparison of Rankine and Carnot Cycles - MCQs with Answers
Reheat Cycle - MCQs with Answers
Ideal Regenerative Vapour & Gas Power Cycle - MCQs with Answers
Feedwater Heater - Vapour & Gas Power Cycle - MCQs with Answers
Ideal Working Fluid in Vapour Power Cycles - MCQs with Answers
Steam Power Plant - Vapour & Gas Power Cycle - MCQs with Answers
Gas Power Cycle - MCQs with Answers
Air Standard Cycle - MCQs with Answers
Otto Cycle - MCQs with Answers
Diesel Cycle - MCQs with Answers
Brayton Cycle - MCQs with Answers
Comparison of Brayton Cycle with Other Cycles - MCQs with Answers
Free-shaft Turbine - MCQs with Answers
Aircraft Propulsion - MCQs with Answers
Thermodynamics - Refrigeration, Psychrometry, Steam Generators
Refrigeration - MCQs with Answers
Vapour Compression Refrigeration Cycle - MCQs with Answers
Refrigerants - MCQs with Answers
Vapour Absorption Refrigeration System - MCQs with Answers
Heat Pump - MCQs with Answers
Gas Cycle Refrigeration - MCQs with Answers
Psychrometrics - MCQs with Answers
Psychrometrics II - MCQs with Answers
Psychrometrics III - MCQs with Answers
Steam Generators - MCQs with Answers
Heat Transfer - Radiation & Heat Exchangers
Thermal Radiation - MCQs with Answers
Radiation Properties - MCQs with Answers
The Black Body and Kirchoff's Law - 1 - MCQs with Answers
The Black Body and Kirchoff's Law - 2 - MCQs
Gray Body - MCQs with Answers
Intensity of Radiation - MCQs with Answers
Radiation Heat Exchange between Black Bodies - MCQs
Electrical Analogy - Radiant Heat Transfer - MCQs with Answers
Radiation Heat Exchange between Gray Bodies - MCQs with Answers
Radiation Shield- MCQs with Answers
Radiation from Gases, Greenhouse Effect - 1 - MCQs with Answers
Radiation from Gases, Greenhouse Effect - 2 - MCQs with Answers
Condensation Heat Transfer - MCQs with Answers
Film Condensation on a Vertical Plate - MCQs with Answers
Boiling Heat Transfer - MCQs with Answers
Heat Exchangers - MCQs with Answers
Compact, Shell & Tube Heat Exchangers - MCQs with Answers
Overall Heat Transfer Coefficient and Fouling Factor - MCQs with Answers
Parallel Flow and Counter Flow Heat Exchangers - MCQs with Answers
Hydraulics & Pneumatics
Fundamentals of Fluid Power System - MCQs with Answers
Fluid Power Systems - MCQs with Answers
Hydraulic Fluids - MCQs with Answers
Fluid Characteristics - 1 - MCQs with Answers
Fluid Characteristics - 2 - MCQs with Answers
Types of Fluid - MCQs with Answers
Governing Principles of Hydraulic System - 1 - MCQs and Answers
Governing Principles of Hydraulic System - 2 - MCQs and Answers
Flow of Hydraulic Fluids - MCQs and Answers
Reynolds Number, Darcey - Weisbach Formula - MCQs and Answers
Losses In Pipe Valves And Fittings - MCQs and Answers
Hydraulic System and Components - 1 - MCQs and Answers
Hydraulic System and Components - 2 - MCQs and Answers
Hydraulic System and Components - 3 - MCQs and Answers
Hydraulic System and Components - 4 - MCQs with Answers
Hydraulic System and Components - 5 - MCQs with Answers
Hydraulic System and Components - 6 - MCQs with Answers
Fluid Power Actuators - 1 - MCQs with Answers
Fluid Power Actuators - 2 - MCQs with Answers
Fluid Power Actuators - 3 - MCQs with Answers
Fluid Power Actuators - 4 - MCQs with Answers
Hydraulic Elements in the Design of Circuits - MCQs with Answers
Accumulators and Intensifiers - MCQs with Answers
Fluid Power in Machine Tools and Other Equipment - MCQs with Answers
Pneumatic Systems - Concepts and Components - MCQs with Answers
Design of Pneumatic Circuits - MCQs with Answers
Multicylinder Pneumatic Circuits & Electropneumatics - MCQs with Answers
Applications of Hydraulics and Pneumatics - MCQs with Answers
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