Mechanical Engineering Interview Questions and Answers
Question - 61 : - Are the pneumatic system and the hydraulic system similar? Explain, how?
Answer - 61 : -
If you are looking for a job as a mechanical engineer they this question must be in your list of mechanical engineer questions and answers. You can explain this concept simply by saying yes, both the systems are similar in the mode of action. Both the pneumatic system and the hydraulic system use pressure to act on a particular application. As the pneumatic system makes use of gases like air or nitrogen, the hydraulic system uses oil or water.
Question - 62 : - Name the different types of gate valves.
Answer - 62 : -
You should consider this question while preparing for mechanical project engineer interview questions and answers. You can respond there are many types of gate valves, namely parallel disk gate valves, Single disk gate valves, and wedge gate valves.
Question - 63 : - Is there any mechanical advantage of using a double pulley?
Answer - 63 : -
This type of question is asked to check your analytical mind. So, you also must include this question in your mechanical project engineer interview questions and answers list. You should say yes, a double pulley cuts our efforts, taking half the effort and moving the object double the distance. You can enhance your understanding of this concept through mechanical engineering courses.
Question - 64 : - Explain the difference between the turbine and the pump.
Answer - 64 : -
This may seem a general question but it is important to include it in your mechanical engineering interview questions and answers list. You should answer this question in a simple way. While the turbine conveys the flow energy of the fluid to mechanical energy, the pump deals with transferring mechanical energy to the fluid.
Question - 65 : - Why airplanes made up of thicker paper fly farther?
Answer - 65 : -
If you are preparing for mechanical engineering interview questions and answers, this question must be on your list. You can answer this question by saying it happens because the thicker the paper, the greater is its mass and potential energy. Potential energy converts into kinetic energy while moving and this large kinetic energy provides a larger lift to the airplane and larger lift results in a large flight distance.
Question - 66 : - Can motor oil be used in a hydraulic system?
Answer - 66 : -
This is amongst the important questions to be considered while preparing for mechanical engineer questions and answers. Motor oil can be used in a hydraulic system but we should avoid using it. This is mainly because motor oil has lower sulfur content, contain tackifiers and other elements that are detrimental to seals and other hydraulic system components. Instead, we should use hydraulic fluids.
Question - 67 : - What is a periscope? Give its real-life application.
Answer - 67 : -
This is another basic question you should consider while preparing for mechanical project engineer interview questions and answers. Periscope typically refers to an optical instrument used for viewing objects which are above the level of sight. In the real world, periscope is used in submarines in order to keep an eye on enemies or any other danger.
Question - 68 : - Which gases can be used in place of nitrogen in welding?
Answer - 68 : -
This is the basic question you must include in your mechanical project engineer interview questions and answers list. You should answer this question by saying during welding, Argon, Helium, or Carbon Dioxide can be used in place of Nitrogen to prevent porosity.