Heat Transfer Questions

Q.  In counter flow heat exchangers_________________?

a. both the fluids at inlet (of heat ex¬changer where hot fluid enters) are in their coldest state
b. both the fluids at inlet are in their hot¬test state
c. both the fluids .at exit are in their hottest state
d. one fluid is in hottest state and other in coldest state at inlet
e. any combination is possible depending on design of heat exchanger


ANSWER: See Answer
 
No explanation is available for this question!
MCQs:  If the temperature of a solid surface changes form 27°C to 627°C, then its emissive power changes in the ratio of___________________?
Category: Mechanical Engineering Questions,   Published by: T-Code Scripts
MCQs:  In regenerator type heat exchanger, heat transfer takes place by___________________?
Category: Mechanical Engineering Questions,   Published by: T-Code Scripts
MCQs:  Two plates spaced 150 mm apart are maintained at 1000°C and 70°C. The heat transfer will take place mainly by ___________________?
Category: Mechanical Engineering Questions,   Published by: T-Code Scripts
MCQs:  Depending on the radiating properties, body will be transparent when________________?
Category: Mechanical Engineering Questions,   Published by: T-Code Scripts
MCQs:  Absorptivity of a body will be equal to its emissivity___________________?
Category: Mechanical Engineering Questions,   Published by: T-Code Scripts
MCQs:  The amount of radiation mainly depends on___________________?
Category: Mechanical Engineering Questions,   Published by: T-Code Scripts
MCQs:  The ratio of the energy absorbed by the body to total energy falling on it is called_________________?
Category: Mechanical Engineering Questions,   Published by: T-Code Scripts
MCQs:  The emissive power of a body depends upon its___________________?
Category: Mechanical Engineering Questions,   Published by: T-Code Scripts
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____________________?
Category: Mechanical Engineering Questions,   Published by: T-Code Scripts
MCQs:  The total emissivity power is .defined as the total amount of radiation emitted by a black body per unit_______________?
Category: Mechanical Engineering Questions,   Published by: T-Code Scripts
MCQs:  Depending on the radiating properties, a body will be black when_________________?
Category: Mechanical Engineering Questions,   Published by: T-Code Scripts
MCQs:  According to Stefan’s law, the total radiation from a black body per second per unit area is proportional to____________________?
Category: Mechanical Engineering Questions,   Published by: T-Code Scripts
MCQs:  The thermal diffusivities for solids are generally__________________?
Category: Mechanical Engineering Questions,   Published by: T-Code Scripts
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_________________?
Category: Mechanical Engineering Questions,   Published by: T-Code Scripts
MCQs:  Depending on the radiating properties, a body will be white when_________________?
Category: Mechanical Engineering Questions,   Published by: T-Code Scripts
MCQs:  Depending on the radiating properties, a body will be opaque when _________________?
Category: Mechanical Engineering Questions,   Published by: T-Code Scripts
MCQs:  According to Wien’s law, the wavelength corresponding to maximum energy is proportion to ________________?
Category: Mechanical Engineering Questions,   Published by: T-Code Scripts
MCQs:  For starting an axial flow pump, its delivery valve should be____________________?
Category: Mechanical Engineering Questions,   Published by: T-Code Scripts
MCQs:  Centrifugal pump is started with its delivery valve __________________?
Category: Mechanical Engineering Questions,   Published by: T-Code Scripts
MCQs:  When a piping system is made up primarily of vertical lift and very little pipe friction, the pump characteristics should be _________________?
Category: Mechanical Engineering Questions,   Published by: T-Code Scripts