When stacking materials such as bricks or block, do not stack ...

[SO00]

When stacking materials such as bricks or block, do not stack materials beyond a _____.
 
  a. 3:1 height-to-base ratio
  b. 4:1 height-to-base ratio
  c. 5:1 height-to-base ratio
  d. 10:1 height-to-base ratio

Question 2

When placing a ladder against a platform or roof, the top of the ladder should extend above the point where
  the ladder touches the platform or roof by at least _____.
 
  a. 2 feet (61 cm)
  b. 3 feet (91 cm)
  c. 4 feet (1.2 m)
  d. 5 feet (1.5 m)

[Li Jun]

Answer to Question 1

b

Answer to Question 2

b

[SO00]

Excellent

[recede]

Gracias!