Which of the following characteristics of flat-roofed structures best explains why flat roofs don’t use shingles? Their roofs cannot be seen from the street.
They can be both one story or multistory.
They were common during the middle of the 20th century.
Their roofs are not actually flat but are slightly angled.

Apipe with an outside diameter of 15 cm is exposed to an ambient air and surrounding temperature of -20°c. the pipe has an outer surface temperature of 65°c and an emissivity of 0.85. if the rate of heat loss from the pipe surface is 0.95 kw per meter of length, the external convective heat transfer coefficient (h) is: (a) 12.5 w/m"k (b) 18.6 w/mk (c) 23.7 w/mk (d) 27.9 w/mk (e) 33.5 w/mk

The thermal expansion or contraction of a given metal is a function of the f a)-density b)-initial temperature c)- temperature difference d)- linear coefficient of thermal expansion e)- final temperature f)- original length

Inadequate stores control is not an obstacle to effective work order system. (clo4) a)-true b)-false