Scaffolding Quiz
Select the correct answer and then click DONE. Who must oversee the erecting and dismantling of scaffolding?
Site supervisor
O Manufacture representative
Competent person
Any worker
O Safety director
Done

The temperature of air decreases as it is compressed by an adiabatic compressor. a)- true b)- false

During a steady flow process, the change of energy with respect to time is zero. a)- true b)- false

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