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Mechanical Engineering Technical Questions with Correct Answers.
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Mechanical Engineering Technical Questions with Correct Answers.
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Mechanical Engineering Technical Questions with Correct AnswersWhat state the first law of Thermodynamics? Correct Answer-
Conservation of Energy
What states the second law of Thermodynamics? Correct Answer-All the heat entering in a system cannot be transformed to work
How many degrees of freedom did a four bar linkage posses? Correct Answer-1
Steel is an alloy between iron and...? Correct Answer-Carbon
In a simple spring-mass system, stability with oscillations is obtained when the differential equation laplace transform have..? Correct Answer-Imaginary negative roots
What describes the Navier Stokes equations? Correct Answer-Fluid Mechanics
The potential energy of a vertically raised body is __________ the kinetic energy of a vertically falling body. Correct Answer-Equal to
The angular velocity (in rad / s) of a body rotating at N revolutions per minute is Correct Answer-2πN/60 Which of the following is not a scalor quantity.
BA.Force
B.Speed
C.Velocity
D.Accelaration Correct Answer-Speed
The minimum force required to slide a body of weight W on a rough horizontal plane is Correct Answer-W tan θ
The rate of change of momentum is directly proportional to the impressed force, and takes place in the same direction in which the force
acts. This statement is known as Correct Answer-Newton's second law of motion
The point, through which the whole weight of the body acts, irrespective
of its position, is known as Correct Answer-centre of gravity
In ideal machines, mechanical advantage is __________ velocity ratio. Correct Answer-equal to
A differential pulley block has larger and smaller diameters of 100 mm and 80 mm respectively. Its velocity ratio is Correct Answer-10 The moment of inertia of a square of side a about its diagonal is Correct Answer-(a^4)/12
The ____________________ chisel is used for general chiseling. Correct Answer-Flat
Which layout tool is used to mark lines parallel to a finished edge? Correct Answer-Odd-leg caliper
The ______________ is used to scribe arcs, circles and step-off distances on a work piece. Correct Answer-Divider
The part of the file used to prevent the handle from splitting is called the _________________. Correct Answer-Ferrule
Files are layout tools made from high carbon steel Correct Answer-False
What Is The Mechanical Advantage Of A Double Pulley? Correct Answer-It only takes half the effort to move an object but twice the distance.
What Is Knurling? Correct Answer-Machining process normally carried our on a centre lathe. The act of Knurling creates a raised criss-cross pattern on a smooth round bar that could be used as a handle or something that requires extra grip. How Does Hydraulic Clutches Work? Correct Answer-By using a non-
compressible fluid, it acts like a solid push rod.
Define The Term Stability Of A Feed Back Control System ? Correct Answer-A system is said to be stable if the output of a system after fluctuations, variations or oscillations, settles at a reasonable value for any change in input.
What are the factors that can affect the Factor of safety selection? Correct Answer-The factor of safety is used in designing a machine component. Prior to selecting the correct factor of safety certain points must be taken into consideration such as:
> The properties of the material used for the machine and the changes in its intrinsic properties over the time period of service.
> The accuracy and authenticity of test results to the actual machine parts.
> The applied load reliability.> The limit of stresses (localized).
> The loss of property and life in case of failures.> The limit of initial stresses at the time period of manufacture.
> The extent to which the assumptions can be simplified.
The factor of safety also depends on numerous other considerations such
as the material, the method of manufacturing , the various types of stress, the part shapes etc.
What is heat treatment and why is it done? Correct Answer-Heat treatment can be defined as a combination of processes or operations in
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