Suggested Certification for Mechanical Engineer

Certified Systems Engineering Professional - International Council on Systems Engineering, IAPMO Mechanical Inspector - National Inspection, Testing and Certification Corporation

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Interview Questions and Answers

PE licensure typically requires a bachelors degree in engineering, passing the Fundamentals of Engineering (FE) exam, completing several years of work experience under a licensed engineer, and passing the Principles and Practice of Engineering (PE) exam.

By attending conferences, reading industry publications, participating in professional development courses, and engaging with professional organizations like ASME (American Society of Mechanical Engineers).

Ethical considerations include ensuring the safety of products and systems, protecting the environment, and upholding professional standards.

Mechanical engineers typically have a stronger focus on design, analysis, and research, while mechanical engineering technologists focus more on applying existing technologies and techniques to solve practical problems.

CAD is the use of computer software to create, modify, and analyze designs for mechanical components and systems.

Mechanical engineers in the automotive industry design and develop engines, transmissions, suspension systems, and other mechanical components of vehicles.

Mechanical engineers in the aerospace industry design and develop aircraft engines, airframes, and other mechanical systems for aircraft and spacecraft.

PE licensure typically requires a bachelors degree in engineering, passing the Fundamentals of Engineering (FE) exam, completing several years of work experience under a licensed engineer, and passing the Principles and Practice of Engineering (PE) exam.

By attending conferences, reading industry publications, participating in professional development courses, and engaging with professional organizations like ASME (American Society of Mechanical Engineers).

Solid mechanics is the study of the behavior of solid materials under stress and strain, including deformation, fracture, and fatigue.

Manufacturing processes are the methods used to convert raw materials into finished products, including machining, casting, forming, and joining.

Control systems are systems that regulate and control the behavior of machines and processes, often using feedback loops and automation.

FEA is a numerical method used to analyze the behavior of structures and components under stress, heat, and other conditions. It is used to predict deformation, stress distribution, and other critical parameters.

Mechanical engineers in the automotive industry design and develop engines, transmissions, suspension systems, and other mechanical components of vehicles.

Mechanical engineers in the aerospace industry design and develop aircraft engines, airframes, and other mechanical systems for aircraft and spacecraft.

Ethical considerations include ensuring the safety of products and systems, protecting the environment, and upholding professional standards.

Mechanical engineers typically have a stronger focus on design, analysis, and research, while mechanical engineering technologists focus more on applying existing technologies and techniques to solve practical problems.

Control systems are systems that regulate and control the behavior of machines and processes, often using feedback loops and automation.

FEA is a numerical method used to analyze the behavior of structures and components under stress, heat, and other conditions. It is used to predict deformation, stress distribution, and other critical parameters.

CAD is the use of computer software to create, modify, and analyze designs for mechanical components and systems.

Solid mechanics is the study of the behavior of solid materials under stress and strain, including deformation, fracture, and fatigue.

Manufacturing processes are the methods used to convert raw materials into finished products, including machining, casting, forming, and joining.

Powerproducing machines such as electric motors, internal combustion engines and steam and gas turbines are built by mechanical engineers, as well as powerusing machines such as cooling and airconditioning systems. Within buildings, mechanical engineers design other equipment, such as elevators and escalators.

Double pulleys can require less effort to move loads than single pulleys. A greater mechanical benefit means that the transfer of the same load requires less effort. By using a double pulley we require less effort to move the same load as compare to a single pulley.

Noncompressible liquid: The fluid which does not show a change in volume or density when subjected to external forces.

Knurling: Knurling is a manufacturing process, typically conducted on a lathe, whereby a pattern of straight, angled or crossed lines is rolled into the material.

Factor of safety: In engineering, a factor of safety (FoS), also known as safety factor (SF), expresses how much stronger a system is than it needs to be for an intended load.

Otto cycle: An Otto cycle is an idealized thermodynamic cycle that describes the functioning of a typical spark ignition piston engine. The Otto cycle is a description of what happens to a mass of gas as it is subjected to changes of pressure, temperature, volume, addition of heat, and removal of heat.

Stress is the force applied to a material, divided by the material's crosssectional area.

Strain is the deformation or displacement of material that results from an applied stress.

Pipes with a circular crosssection can withstand large pressure differences between the inside and the outside without undergoing significant distortion.

Cubic Centimetres

Size of an engine refers to the total volume of air and fuel being pushed through the engine by the cylinders. It's measured in cubic centimetres (cc). For example, a 1,000cc engine can displace one litre (1,000 cubic centimetres) of this airfuel mixture.

Heat treatment involves the use of heating or chilling, normally to extreme temperatures, to achieve the desired result such as hardening or softening of a material.

Maximum shear stress occurs on the crosssection of the shaft on the outermost surface of the shaft. It has importance in controlling the shaft's failure and should therefore be considered for design purposes.

Chain drives are made of metal, which makes them more durable and stronger compared to a belt.

Internal combustion heat engines work on the principle of the ideal gas law. Raising the temperature of a gas increases the pressure that makes the gas want to expand. An internal combustion engine has a chamber, which has fuel added to it which ignites in order to raise the temperature of the gas.

Advantages of Gear drive:


It is a positive drive hence velocity remains constant.
Provisions for changing velocity ratios can be made with the help of a gear box.
Its efficiency is very high.
It can be used even for low speeds.
It can transmit high torque values.
It is compact.

Sphere

Despite being difficult to manufacture, a sphere is the best shape for a pressure vessel. Spherical pressure vessels are preferred for storage of high pressure fluids. A sphere is a very strong structure.

The most common types of spring are: Cantilever spring – a spring fixed only at one end. Coil spring or helical spring – a spring (made by winding a wire around a cylinder).

The four most common types of air compressors are:


Rotary Screw Compressor.
Reciprocating Air Compressor.
Axial Compressor.
Centrifugal Compressor.

Rotameters or Variable Area Flow Meter.
Spring and Piston Flow Meters.
Mass Gas Flow Meters.
Ultrasonic Flow Meters.
Turbine Flow Meters.
Paddlewheel Sensors.
Positive Displacement Flow Meters.
Vortex Meters.

Diesel engines use higher compression ratios than petrol engines, because the lack of a spark plug means that the compression ratio must increase the temperature of the air in the cylinder sufficiently to ignite the diesel using compression ignition.

Disc Brakes. Disc brakes consist of a brake rotor that is attached directly to the wheel.
Drum Brakes. Drum brakes consist of a brake drum attached to the inside of the wheel.