To insure that the rafters or joists do not interfere with ...

[anshika]

To insure that the rafters or joists do not interfere with installation of the plenums on a curb mounted rooftop unit
 
  A) The roof curb must be installed diagonal to the roof joists or rafters
  B) The roof curb must be square with the roof joists or rafters
  C) The roof joists or rafters are cut out where the curb is installed
  D) The plenums are fabricated in place with the roof joists or rafters passing through them

Question 2

Select the characteristics of flake ice. You may select more than one.
 
  A) Slower melting B) Cloudy C) Faster melting
  D) 70 hardness E) 95 hardness F) Clear

[huda]

Answer to Question 1

B

Answer to Question 2

B, C, D

[anshika]

Wow, this really help

[kishoreddi]

Gracias!