Technician A says that header-type exhaust manifolds produce less ...

[formula1]

Technician A says that header-type exhaust manifolds produce less back pressure than do most cast-iron exhaust manifolds. Technician B says that only cast-iron exhaust manifolds are used on production vehicles. Which technician is correct?
 
  A) Technician A only B) Technician B only C) Both technicians D) Neither technician

Question 2

Which of these has the lowest dielectric constant?
 
  A) Paper B) Vacuum C) Mica D) None of these

[kbennett34]

Answer to Question 1

A

Answer to Question 2

B