15. The heat transfer problems encountered in practice can be considered in two
ID: 703455 • Letter: 1
Question
15. The heat transfer problems encountered in practice can be considered in two groups A. vibrational and rotational problems B. external and internal problems C. rating and sizing problems D. None of the above and 16. The heat flux, or the rate of heat transfer per unit area, is measured in watts (Watts) only A. TRUE B. FALSE 17. In the analysis of systems that involve fluid flow, we frequently encounter the combination of properties u and Pv. The combination is defined as enthalpy: D. none of the above 18. Fouling occurs when any type of particles both organic or inorganic plug or plate out on heat transfer surfaces creating a to transfer energy. A. reaction B. resistance C. increase D. none of the aboveExplanation / Answer
15Ans.
option c is correct. rating and sizing problems.
The rating problems deal with the determination of the heat transfer rate for an existing system at a specified temperature difference. The sizing problems deal with the determination of the size of a system in order to transfer heat at a specified rate for a specified temperature difference.
16.Ans
option b is correct because The heat flux, or the rate of heat transfer per unit area, is measured in watts per area (W/m²)
17. Ans
option c is correct because of enthalpy (H) =U+PV
18.Ans
option B is correct because In Fouling heat transfer surfaces create resistance to transfer energy.
Related Questions
drjack9650@gmail.com
Navigate
Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.