MECHANICAL ENGINEERING INTERVIEW QUESTIONS
1.)What does angular momentum mean?
Ans:-Angular momentum is an expression of an objects mass and rotational speed. Momentum is the velocity of an object times it is mass, or how fast something is moving how much it weigh. Therefore, angular momentum is the objects mass times the angular velocity where angular velocity is how fast something is rotating expressed in terms like revolutions per minute or radians per second or degrees per second.
2.)What is the role of nitrogen in welding?
Ans:-Nitrogen is used to prevent porosity in the welding member by preventing oxygen and air from entering the molten metal during the welding process. Other gases are also used for this purpose such as Argon, Helium, Carbon Dioxide, and the gases given off when the flux burns away during SMAW (stick) welding.
3.) What causes white smoke in two stroke locomotive engines?
Ans:-That is the engine running too lean (lack of fuel). This condition will lead to overheating and failure of the engine.
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