MECHANICAL ENGINEERING JOB INTERVIEW QUESTIONS :- 1.)Why condenser is needed in steam power plant? Ans.-The function of the condenser is to condense exhaust steam from the steam turbine by rejecting the heat of vaporization to the cooling water passing through the condenser. 2.)What is absolute humidity and relative humidity? Ans.-Absolute humidity is the mass of water vapor divided by the mass of dry air in a volume of air at a given temperature. The hotter the air is, the more water it can contain.Relativ e humidity is the ratio of the current absolute humidity to the highest possible absolute humidity. 3.)What is viscosity? Ans.-The viscosity of a fluid is a measure of its resistance to gradual deformation by shear stress or tensile stress. For liquids, it corresponds to the informal notion of"thickness". For example, honey has a higher viscosity than water. 4.)What is difference between power cycles and heat pump cycles? Ans.-Any thermodynamic cycle functions in a similar way. There are basically 3 interlinked energy sources at play: 1. A reservoir of heat energy at high temperature Eh 2. A reservoir of heat energy at low temperature Ec 3. Mechanical (driving) energy P. The power cycle provides high temperature heat energy Eh, harvests mechanical P and throws away low temperature energy into Ec. Whereas, The heat pump provides P, harvests Eh and throws away into Ec.
Posted on: Mon, 23 Sep 2013 19:10:36 +0000
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