MECHANICAL ENGINEERING JOB INTERVIEW QUESTIONS :- 1.)Which Pump is more Efficient Centrifugal Pump or Reciprocating Pump? Ans.Centrifugal pump. Because flow rate is higher compared to reciprocating pump. Flow is smooth and it requires less space to install. Lower initial cost and lower maintenance cost. 2.)Compare Brayton Cycle and Otto Cycle? Ans.The heat addition and rejection processes in Otto cycle are of constant volume, whereas in Brayton cycle, they are of constant pressure. -Otto cycle is the ideal cycle for spark ignition engines. -Brayton cycle is the ideal cycle for gas power turbines. 3.)What is the purpose of Scrapper Ring? Ans. Scrap the excess lube oil from the cylinder walls. there by preventing oil from entering combustion zone. 4.)State difference between AnitiFriction Bearing and Journal Bearing? Ans. Generally, journal bearings have higher friction force, consume higher energy and release more heat, but they have larger contact surface, so normally used in low speed high load applications. In anti friction bearings friction is less. One object just rolls over each other.
Posted on: Wed, 02 Oct 2013 01:41:13 +0000
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