Air cleaners that use high voltage DC current to ionize particles ...

[rosent76]

Air cleaners that use high voltage DC current to ionize particles in the air and attract them to oppositely charged plates are a type of
 
  A) Electro-mechanical particle arrested B) electrostatic air cleaner
  C) electronic air cleaner D) Ultraviolet air sterilizer

Question 2

As a rule of thumb, _____ screws are required per 1,000 square feet of wallboard to install single-layer
  drywall on 16 OC studs.
 
  a. 800
  b. 1,000
  c. 1,200
  d. 1,500

[cloudre37]

Answer to Question 1

C

Answer to Question 2

b