October 10, 2013

MECHANICAL ENGINEERING JOB INTERVIEW QUESTIONS


1.) What is the difference between Fan and Blower?

Ans.Fan is an air pushing device. Either Axial or Centrifugal type systems are used to move the air in low pressure. It is rotated 
by a motor separately.
When the fan is a housing of blades and motor, then it called as Blower. It directs the air in a single path with high pressure.

2.) What is Heat Rate of Power Plant?

Ans.Heat rate is a measure of the turbine efficiency. It is determined from the total energy input supplied to the Turbine divided by the electrical energy output.

3.) What is Hydrodynamic Cavitation?

Ans.Hydrodynamic cavitation describes the process of vaporization in a constrained channel at a specific velocity.
Bubble generation and Bubble implosion which occurs in a flowing liquid as a result of a decrease and subsequent increase in 
pressure.

4.)What is Difference between Hardness and Toughness?
Ans. Toughness is the ability of a material to absorb energy.
Hardness is the ability of a material to withstand wear.

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