Download Aptitude Crack
img not found img not found

Heat Transfer - Engineering

Q1:

If average heat transfer co-efficient is ha and the local coefficient at the end of the plate is hl then in case of heat transfer to a fluid flowing over a flat plate, heated over its entire length

A ha = hl

B ha = 2hl

C ha = 0.5 hl

D ha = 0.75 hl

ANS:B - ha = 2hl

In the case of heat transfer to a fluid flowing over a flat plate, heated over its entire length, the average heat transfer coefficient (ℎ​) is related to the local coefficient at the end of the plate (hl​) by the following relationship: ha​=0.75⋅hl​ So, the correct answer is: "ha = 0.75 hl"