Shielding gas for GTAW most often is: A) CO2 B) 100 helium C) ...

[ahriuashd]

Shielding gas for GTAW most often is:
 
  A) CO2 B) 100 helium
  C) 100 argon D) 75 argon, 25 CO2

Question 2

A mechanical seal that has one seal inside the stuffing box and one seal outside the stuffing box is known as a
  _____
  seal.
 
  a. single inside mechanical
  b. face-to-face mechanical
  c. back-to-back mechanical
  d. tandem

[janeli]

Answer to Question 1

C

Answer to Question 2

b

[ahriuashd]

Thanks for the timely response, appreciate it

[EAN94]

Gracias!