Heat Transfer Questions

Q.  The value of Prandtl number for air is about _______________________?

a. 0.1
b. 0.3
c. 0.7
d. 1.7
e. 10.5


ANSWER: See Answer
 
No explanation is available for this question!
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MCQs:  40% of incident radiant energy on the surface of a thermally transparent body is reflected back. If the transmissivity of the body be 0.15, then the emissivity of surface is____________________?
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MCQs:  The total emissivity power is .defined as the total amount of radiation emitted by a black body per unit_______________?
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MCQs:  Depending on the radiating properties, a body will be black when_________________?
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MCQs:  According to Stefan’s law, the total radiation from a black body per second per unit area is proportional to____________________?
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MCQs:  The thermal diffusivities for solids are generally__________________?
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MCQs:  The ratio of the emissive power and absorptive power of all bodies is the same and is equal to the emissive power of a perfectly black body. This statement is known as_________________?
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MCQs:  Depending on the radiating properties, a body will be white when_________________?
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MCQs:  Depending on the radiating properties, a body will be opaque when _________________?
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MCQs:  According to Wien’s law, the wavelength corresponding to maximum energy is proportion to ________________?
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MCQs:  For starting an axial flow pump, its delivery valve should be____________________?
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MCQs:  Centrifugal pump is started with its delivery valve __________________?
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MCQs:  When a piping system is made up primarily of vertical lift and very little pipe friction, the pump characteristics should be _________________?
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MCQs:  Multistage centrifugal pumps are used to obtain___________________?
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MCQs:  In a single casing, multistage pump running at constant speed, the capacity rating is to be slightly lowered. It can be done by_______________?
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MCQs:  One horsepower is equal to_________________?
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MCQs:  Axial flow pump is started with its delivery valve________________?
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MCQs:  Head developed by a centrifugal pump depends on___________________?
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MCQs:  In a centrifugal pump casing, the flow of water leaving the_______________?
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MCQs:  Reciprocating pumps are no more to be seen in industrial applications (in comparison to centrifugal pumps) because of____________________?
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MCQs:  The efficiency of a centrifugal pump is maximum when its blades are__________________?
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