Mechanical Engineer Interview Questions And Answers Pdf
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- 600 TOP MECHANICAL ENGINEERING Interview Questions and Answers PDF
- Mechanical Engineering Interview Questions & Answers
Are you passionate to work in automobile industry or do you want to become a research scholar then choose the best online portal that is wisdomjobs online portal. Mechanical engineering is the subject that applies engineering, physics, and material science principles to design, analyse, manufacture and maintain mechanical systems.
It is a branch of engineering that is related to industrial application of mechanics and with the tools, machinery and their products. Mechanical engineers create and develop mechanical systems by using their knowledge of design, manufacture and operational processes to make the technology more advanced throughout the world. Leading companies are looking for candidates who have thorough knowledge in mechanical systems.
They have lot of scope in automobiles, aerospace, agriculture, chemical, power generation, consultancy, research and development organisations etc. So, guys utilize the opportunity by going through our mechanical engineering job interview questions and answers page. Question 1. What Is Extrued Aluminum? Extruded Aluminum is a common form of making small aluminum wire, bars or beams and many varieties of small non-structural, decorative pieces.
Question 2. Answer : It only takes half the effort to move an object but twice the distance. Answer : Knurling is a 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. Question 4. How Does Hydraulic Clutches Work? Answer : By using a non-compressible fluid, it acts like a solid push rod. Question 5. Answer : Overcharging a refrigeration or air conditioning system can result in an explosion.
To avoid serious injury or death, never overcharge the system. Always use proper charging techniques. Limit charge amounts to those specified on the system equipment serial label or in the original equipment manufacturer's service information. Overcharging the system immerses the compressor motor, piston, connecting rods, and cylinders in liquid refrigerant. This creates a hydraulic block preventing the compressor from starting.
The hydraulic block is also known as locked rotor. Continued supply of electricity to the system causes heat to build in the compressor. This heat will eventually vaporize the refrigerant and rapidly increase system pressure. If, for any reason, the thermal protector fails to open the electrical circuit, system pressure can raise to high enough levels to cause a compressor-housing explosion.
Question 6. Answer : Even the heaviest steel cables stretch under load, whether they heat or not. Heating the cable will certainly elongate it. Friction caused by guides or pulleys can greatly increase the temperature of a cable under load. You might consider the possibility of total failure if the heat is high enough and I am not sure but the cable might act in unpredictable ways when it fails.
Applying heat to a steel cable under load is probably dangerous to your health and the health of anyone nearby. When steel is heated, steel expands. It does not need to be under load. That is the reason that in the old days before advanced electronics and optics surveyors used chains rather than cables for measuring land. Had they used cable they would have gotten different measurements in summer and winter based on the difference in temperature and the coefficient of expansion of the material.
The coefficient of expansion is a number that informs just how much a given material will expand or contract for a given change in temperature. To find the coefficient of expansion and other interesting information consult a materials handbook, available in better libraries or your local college of engineering.
Another example of expanding steel and the necessity for dealing with this characteristic is the overlapping slip joint found on bridges that allows horizontal structural members to expand and contract without damaging the bridge.
Question 7. Answer : The medal was created in , designed by Congress for "any astronaut who in the performance of his duties has distinguished himself by exceptionally meritorious efforts and contributions to the welfare of the Nation and mankind.
Question 8. Answer : There are actually 3 Laws of Thermodynamics the actual number is debatable, but the number ranges from , depending on your adding skills.
Question 9. Answer : A Force applied to an object will cause a displacement. Strain is effectively a measure of this displacement change in length divided by original length. Question Answer : A supercharger is a used to increase the volume of air dragged into each cylinder per stroke. In combustion engines, there are only really two ways to increase power, firstly increase the amount of fuel in the engine either increase the displacement, or add more cylinders or increase the amount of air in the engine for a more effective explosion of the fuel.
Superchargers are powered by the engines crankshaft, which is connected usually by a belt drive. This rotational power turns a fan, which sucks air into the intake manifold similar in effect to turbochargers, with reduced lag. However, superchargers take more energy out the engine, so swings and roundabouts.
Answer : They are clicking because they are heating up. The heat causes expansion and that is why you hear clicking. Answer : Pneumatics use gases such as air or nitrogen, hydraulics use oil or water, both systems use pressure to act on a specific application. Answer : There is no fundamental difference between an electric motor and an electric generator or dynamo. In normal use, all motors behave as generators, and all generators behave as motors.
DC Motors act like generators because they use less electrical energy when allowed to spin fast. DC generators act like motors because they become easier to spin when less electrical energy is drawn from their terminals. For example, connect two small DC magnet motors together.
Then if you spin the shaft of the first motor, the second motor's shaft will start spinning too. One acts as a DC generator, and the other acts as a DC motor. Alternatively, spin the second one's shaft, and the first one will start spinning. Another example: If you connect a small DC motor to a small battery, then an electric current will appear in the motor's coils, and the motor starts spinning. However, if you spin the motor's shaft slightly faster than the normal speed, the direction of current in the circuit will reverse, and the battery starts taking in energy from the motor.
The motor has become a generator, and it is recharging the battery. Answer : It is an optical instrument for viewing objects, which are above the level of direct sight; mostly used in submarines. Answer : Green field projects are those projects, which do not create any environmental nuisance pollution , follows environmental management system and EIA environment impact assessment.
These projects are usually of big magnitude. Answer : More likely because it is easier to manufacture, much easier to put threads on, you do not have to worry about orientation when you put them together, and they have no weak spots created by corners. My gutter pipes are rectangular because they do not stick out as far from the house as a circular one with the same area.
However, they are low enough in the pressure they contain that they can be formed from sheet metal with a crimped seam. Making a water supply pipe, that way would be impossible. In addition, it is easy to keep them aligned to the house.
Running a rectangular water main under a street would be a major pain. Answer : The pipe was constructed in six sections by five different contractors employing 21, people at the peak of work. Answer : Submarines have ballast tanks. The tanks can hold air, or they can be "vented" and water can flow into them and fill them completely.
When the tanks are full of air, the submarine is buoyant and floats. When the main vents are opened, the tanks are flooded and the submarine submerges. When the submarine is submerged, wants to surface, air can be injected at high pressure into the ballast tanks to force out water, again make the submarine buoyant, and cause it to rise to the surface and float. In practice, when a submarine surfaces, it doesn't use a lot of air from its high pressure air tanks to "blow the ballast tanks" because it takes a long time to pump up the high pressure air tanks again.
What happens is that all the ballast tanks are given a "good shot" of high-pressure air a few seconds , and then the planes are used in conjunction with the screw which some call a propellor to actually drive a submarine to the surface. Once there, something called a low-pressure blower system can be used to finish blowing the ballast tanks while the high-pressure air compressors are running to pump the high-pressure air tanks back up.
What Is Railroad Track Ballast? Answer : That being said railroad track ballast is the cover for the subgrade. Ballast has several functions:. As ballast becomes contaminated with other materials, it looses its ability to do some or all of these jobs. What Is A Turboprop Engine? Answer : The combination of the words turbine and propeller in techno jargon will give you the word "turboprop".
A conventional jet engine produces its thrust in large part due to the heated gasses escaping out the rear of the engine. While this is very useful for aircraft, which fly at high speeds and high altitudes, it is less desirable for aircraft, which are designed to fly at slower speeds and take off from smaller runways. A turboprop engine is a jet engine, which converts the bulk of its thrust into rotational energy for powering a propeller.
This allows jet engines, which are a high-rpm low-torque engine to be used in situations where low-rpm and high-torque are needed instead. The higher reliability and efficiency of a jet or turboprop engine as compared to an internal combustion engine makes them very desirable for aircraft designs, which, in the past, would have utilized internal combustion engines.
What Are Examples Of Mechanisms? Answer : Examples of mechanisms are the workings of a clock, a light switch, and a nail clipper.
600 TOP MECHANICAL ENGINEERING Interview Questions and Answers PDF
What is the difference between isotropic and anisotropic materials? If a material exhibits same mechanical properties regardless of loading direction, it is isotropic, e. Materials lacking this property are anisotropic. What are orthotropic materials? It is a special class of anisotropic materials which can be described by giving their properties in three perpendicular directions e. What is view factor? View factor is dependent upon geometry of the two surfaces exchanging radiation.
Are you passionate to work in automobile industry or do you want to become a research scholar then choose the best online portal that is wisdomjobs online portal. Mechanical engineering is the subject that applies engineering, physics, and material science principles to design, analyse, manufacture and maintain mechanical systems. It is a branch of engineering that is related to industrial application of mechanics and with the tools, machinery and their products. Mechanical engineers create and develop mechanical systems by using their knowledge of design, manufacture and operational processes to make the technology more advanced throughout the world. Leading companies are looking for candidates who have thorough knowledge in mechanical systems. They have lot of scope in automobiles, aerospace, agriculture, chemical, power generation, consultancy, research and development organisations etc.
TOP MECHANICAL ENGINEERING Interview Questions and Answers PDF. What is the difference between isotropic and anisotropic materials? What are orthotropic materials? What is view factor? What properties need to be considered for applications calling for following requirements.
Mechanical Engineering Interview Questions & Answers
Aeronautical Engineering. Bio Engineering. Energy Oil Gas.
Every interviewer has similar goals in mind. Regardless of the mechanical engineering field , you work in, you will face some of the same standard questions during different phases of your interview. To help you prepare, here are some of the top questions and answers to expect when preparing for a mechanical engineering interview:. Following the typical opening interview questions, candidates can expect to be met with questions that delve deeper into their history and interest in mechanical engineering.
Mechanical Engineering Related Tutorials
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