Because concrete is so rigid, rebar in the concrete adds ...

[rl]

Because concrete is so rigid, rebar in the concrete adds ________.
 
  A) Tensile strength B) Reducing cracking threshold
  C) Heat conduction D) Arc length

Question 2

When are shims required when installing a traditional door in relation to the jamb assembly?
 
  A) After jamb assembly B) During jamb assembly
  C) Before jamb assembly D) N/A  shims are not needed

[Brummell1998]

Answer to Question 1

A

Answer to Question 2

B

[rl]

Great answer, keep it coming

[kilada]

Thanks for the timely response, appreciate it