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Pandabearsrlyfe Pandabearsrlyfe
wrote...
Posts: 529
Rep: 1 0
6 years ago
The risers and treads of some shop-built stairs are mortised together to _____.
 
  a. speed up assembly
  b. properly align the treads
  c. reduce fabrication costs
  d. prevent squeaking

 Q. 2

The vertical members used to support forms for a cast-in-place concrete stairway are called _____.
 
  a. struts
  b. props
  c. posts
  d. shores

 Q. 3

Which substance in refrigerants is most responsible for atmospheric ozone depletion?
 
  a. Chlorine
  b. Carbon
  c. Fluorine
  d. Hydrogen
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wrote...
#1
6 years ago
Ans. to #1

d

Ans. to #2

d

Ans. to #3

a
wrote...
#2
6 years ago
Thank you for helping me throughout this difficult semester
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